]> jfr.im git - yt-dlp.git/blobdiff - yt_dlp/YoutubeDL.py
Field `additional_urls` to download additional videos from metadata
[yt-dlp.git] / yt_dlp / YoutubeDL.py
index 3c53f4cd88a3edeb97b9ba8448822fcbece4f0b8..9a2d0abc27ee828a1ef47244a0d58902f10327b0 100644 (file)
@@ -19,7 +19,6 @@
 import re
 import shutil
 import subprocess
-import socket
 import sys
 import time
 import tokenize
@@ -33,7 +32,6 @@
     compat_basestring,
     compat_cookiejar,
     compat_get_terminal_size,
-    compat_http_client,
     compat_kwargs,
     compat_numeric_types,
     compat_os_name,
@@ -50,7 +48,6 @@
     date_from_str,
     DateRange,
     DEFAULT_OUTTMPL,
-    OUTTMPL_TYPES,
     determine_ext,
     determine_protocol,
     DOT_DESKTOP_LINK_TEMPLATE,
@@ -59,6 +56,7 @@
     DownloadError,
     encode_compat_str,
     encodeFilename,
+    EntryNotInPlaylist,
     error_to_compat_str,
     ExistingVideoReached,
     expand_path,
@@ -66,6 +64,7 @@
     float_or_none,
     format_bytes,
     format_field,
+    FORMAT_RE,
     formatSeconds,
     GeoRestrictedError,
     int_or_none,
@@ -75,7 +74,9 @@
     make_dir,
     make_HTTPS_handler,
     MaxDownloadsReached,
+    network_exceptions,
     orderedSet,
+    OUTTMPL_TYPES,
     PagedList,
     parse_filesize,
     PerRequestProxyHandler,
     PostProcessingError,
     preferredencoding,
     prepend_extension,
+    process_communicate_or_kill,
+    random_uuidv4,
     register_socks_protocols,
+    RejectedVideoReached,
     render_table,
     replace_extension,
-    RejectedVideoReached,
     SameFileError,
     sanitize_filename,
     sanitize_path,
     strftime_or_none,
     subtitles_filename,
     to_high_limit_path,
+    traverse_dict,
     UnavailableVideoError,
     url_basename,
     version_tuple,
     YoutubeDLCookieProcessor,
     YoutubeDLHandler,
     YoutubeDLRedirectHandler,
-    process_communicate_or_kill,
 )
 from .cache import Cache
-from .extractor import get_info_extractor, gen_extractor_classes, _LAZY_LOADER, _PLUGIN_CLASSES
+from .extractor import (
+    gen_extractor_classes,
+    get_info_extractor,
+    _LAZY_LOADER,
+    _PLUGIN_CLASSES
+)
 from .extractor.openload import PhantomJSwrapper
-from .downloader import get_suitable_downloader
+from .downloader import (
+    get_suitable_downloader,
+    shorten_protocol_name
+)
 from .downloader.rtmp import rtmpdump_version
 from .postprocessor import (
     FFmpegFixupM3u8PP,
@@ -166,13 +177,14 @@ class YoutubeDL(object):
     verbose:           Print additional info to stdout.
     quiet:             Do not print messages to stdout.
     no_warnings:       Do not print out anything for warnings.
-    forceurl:          Force printing final URL.
-    forcetitle:        Force printing title.
-    forceid:           Force printing ID.
-    forcethumbnail:    Force printing thumbnail URL.
-    forcedescription:  Force printing description.
-    forcefilename:     Force printing final filename.
-    forceduration:     Force printing duration.
+    forceprint:        A list of templates to force print
+    forceurl:          Force printing final URL. (Deprecated)
+    forcetitle:        Force printing title. (Deprecated)
+    forceid:           Force printing ID. (Deprecated)
+    forcethumbnail:    Force printing thumbnail URL. (Deprecated)
+    forcedescription:  Force printing description. (Deprecated)
+    forcefilename:     Force printing final filename. (Deprecated)
+    forceduration:     Force printing duration. (Deprecated)
     forcejson:         Force printing info_dict as JSON.
     dump_single_json:  Force printing the info_dict of the whole playlist
                        (or video) as a single JSON line.
@@ -181,6 +193,9 @@ class YoutubeDL(object):
     simulate:          Do not download the video files.
     format:            Video format code. see "FORMAT SELECTION" for more details.
     allow_unplayable_formats:   Allow unplayable formats to be extracted and downloaded.
+    ignore_no_formats_error: Ignore "No video formats" error. Usefull for
+                       extracting metadata even if the video is not actually
+                       available for download (experimental)
     format_sort:       How to sort the video formats. see "Sorting Formats"
                        for more details.
     format_sort_force: Force the given format_sort. see "Sorting Formats"
@@ -201,6 +216,8 @@ class YoutubeDL(object):
     ignoreerrors:      Do not stop on download errors
                        (Default True when running yt-dlp,
                        but False when directly accessing YoutubeDL class)
+    skip_playlist_after_errors: Number of allowed failures until the rest of
+                       the playlist is skipped
     force_generic_extractor: Force downloader to use the generic extractor
     overwrites:        Overwrite all video and metadata files if True,
                        overwrite only non-video files if None
@@ -216,6 +233,7 @@ class YoutubeDL(object):
     logtostderr:       Log messages to stderr instead of stdout.
     writedescription:  Write the video description to a .description file
     writeinfojson:     Write the video description to a .info.json file
+    clean_infojson:    Remove private fields from the infojson
     writecomments:     Extract video comments. This will not be written to disk
                        unless writeinfojson is also given
     writeannotations:  Write the video annotations to a .annotations.xml file
@@ -230,11 +248,15 @@ class YoutubeDL(object):
     writedesktoplink:  Write a Linux internet shortcut file (.desktop)
     writesubtitles:    Write the video subtitles to a file
     writeautomaticsub: Write the automatically generated subtitles to a file
-    allsubtitles:      Downloads all the subtitles of the video
+    allsubtitles:      Deprecated - Use subtitlelangs = ['all']
+                       Downloads all the subtitles of the video
                        (requires writesubtitles or writeautomaticsub)
     listsubtitles:     Lists all available subtitles for the video
     subtitlesformat:   The format code for subtitles
-    subtitleslangs:    List of languages of the subtitles to download
+    subtitleslangs:    List of languages of the subtitles to download (can be regex).
+                       The list may contain "all" to refer to all the available
+                       subtitles. The language can be prefixed with a "-" to
+                       exclude it from the requested languages. Eg: ['all', '-live_chat']
     keepvideo:         Keep the video file after post-processing
     daterange:         A DateRange object, download only if the upload_date is in the range.
     skip_download:     Skip the actual download of the video file
@@ -280,10 +302,9 @@ class YoutubeDL(object):
     postprocessors:    A list of dictionaries, each with an entry
                        * key:  The name of the postprocessor. See
                                yt_dlp/postprocessor/__init__.py for a list.
-                       * _after_move: Optional. If True, run this post_processor
-                               after 'MoveFilesAfterDownload'
-                       as well as any further keyword arguments for the
-                       postprocessor.
+                       * when: When to run the postprocessor. Can be one of
+                               pre_process|before_dl|post_process|after_move.
+                               Assumed to be 'post_process' if not given
     post_hooks:        A list of functions that get called as the final step
                        for each video file, after all postprocessors have been
                        called. The filename will be passed as the only argument.
@@ -356,11 +377,19 @@ class YoutubeDL(object):
                        geo_bypass_country
 
     The following options determine which downloader is picked:
-    external_downloader: Executable of the external downloader to call.
-                       None or unset for standard (built-in) downloader.
-    hls_prefer_native: Use the native HLS downloader instead of ffmpeg/avconv
+    external_downloader: A dictionary of protocol keys and the executable of the
+                       external downloader to use for it. The allowed protocols
+                       are default|http|ftp|m3u8|dash|rtsp|rtmp|mms.
+                       Set the value to 'native' to use the native downloader
+    hls_prefer_native: Deprecated - Use external_downloader = {'m3u8': 'native'}
+                       or {'m3u8': 'ffmpeg'} instead.
+                       Use the native HLS downloader instead of ffmpeg/avconv
                        if True, otherwise use ffmpeg/avconv if False, otherwise
                        use downloader suggested by extractor if None.
+    compat_opts:       Compatibility options. See "Differences in default behavior".
+                       Note that only format-sort, format-spec, no-live-chat, no-attach-info-json
+                       playlist-index, list-formats, no-youtube-channel-redirect
+                       and no-youtube-unavailable-videos works when used via the API
 
     The following parameters are not used by YoutubeDL itself, they are used by
     the downloader (see yt_dlp/downloader/common.py):
@@ -381,17 +410,18 @@ class YoutubeDL(object):
                         Use 'default' as the name for arguments to passed to all PP
 
     The following options are used by the extractors:
-    dynamic_mpd:        Whether to process dynamic DASH manifests (default: True)
+    extractor_retries: Number of times to retry for known errors
+    dynamic_mpd:       Whether to process dynamic DASH manifests (default: True)
     hls_split_discontinuity: Split HLS playlists to different formats at
-                        discontinuities such as ad breaks (default: False)
+                       discontinuities such as ad breaks (default: False)
     youtube_include_dash_manifest: If True (default), DASH manifests and related
-                        data will be downloaded and processed by extractor.
-                        You can reduce network I/O by disabling it if you don't
-                        care about DASH. (only for youtube)
+                       data will be downloaded and processed by extractor.
+                       You can reduce network I/O by disabling it if you don't
+                       care about DASH. (only for youtube)
     youtube_include_hls_manifest: If True (default), HLS manifests and related
-                        data will be downloaded and processed by extractor.
-                        You can reduce network I/O by disabling it if you don't
-                        care about HLS. (only for youtube)
+                       data will be downloaded and processed by extractor.
+                       You can reduce network I/O by disabling it if you don't
+                       care about HLS. (only for youtube)
     """
 
     _NUMERIC_FIELDS = set((
@@ -407,7 +437,7 @@ class YoutubeDL(object):
 
     params = None
     _ies = []
-    _pps = {'beforedl': [], 'aftermove': [], 'normal': []}
+    _pps = {'pre_process': [], 'before_dl': [], 'after_move': [], 'post_process': []}
     __prepare_filename_warned = False
     _first_webpage_request = True
     _download_retcode = None
@@ -422,7 +452,7 @@ def __init__(self, params=None, auto_init=True):
             params = {}
         self._ies = []
         self._ies_instances = {}
-        self._pps = {'beforedl': [], 'aftermove': [], 'normal': []}
+        self._pps = {'pre_process': [], 'before_dl': [], 'after_move': [], 'post_process': []}
         self.__prepare_filename_warned = False
         self._first_webpage_request = True
         self._post_hooks = []
@@ -437,39 +467,29 @@ def __init__(self, params=None, auto_init=True):
         }
         self.params.update(params)
         self.cache = Cache(self)
-        self.archive = set()
 
-        """Preload the archive, if any is specified"""
-        def preload_download_archive(self):
-            fn = self.params.get('download_archive')
-            if fn is None:
-                return False
-            try:
-                with locked_file(fn, 'r', encoding='utf-8') as archive_file:
-                    for line in archive_file:
-                        self.archive.add(line.strip())
-            except IOError as ioe:
-                if ioe.errno != errno.ENOENT:
-                    raise
-                return False
-            return True
+        if sys.version_info < (3, 6):
+            self.report_warning(
+                'Support for Python version %d.%d have been deprecated and will break in future versions of yt-dlp! '
+                'Update to Python 3.6 or above' % sys.version_info[:2])
 
         def check_deprecated(param, option, suggestion):
             if self.params.get(param) is not None:
-                self.report_warning(
-                    '%s is deprecated. Use %s instead.' % (option, suggestion))
+                self.report_warning('%s is deprecated. Use %s instead' % (option, suggestion))
                 return True
             return False
 
-        if self.params.get('verbose'):
-            self.to_stdout('[debug] Loading archive file %r' % self.params.get('download_archive'))
-
-        preload_download_archive(self)
-
         if check_deprecated('cn_verification_proxy', '--cn-verification-proxy', '--geo-verification-proxy'):
             if self.params.get('geo_verification_proxy') is None:
                 self.params['geo_verification_proxy'] = self.params['cn_verification_proxy']
 
+        check_deprecated('autonumber', '--auto-number', '-o "%(autonumber)s-%(title)s.%(ext)s"')
+        check_deprecated('usetitle', '--title', '-o "%(title)s-%(id)s.%(ext)s"')
+        check_deprecated('useid', '--id', '-o "%(id)s.%(ext)s"')
+
+        for msg in self.params.get('warnings', []):
+            self.report_warning(msg)
+
         if self.params.get('final_ext'):
             if self.params.get('merge_output_format'):
                 self.report_warning('--merge-output-format will be ignored since --remux-video or --recode-video is given')
@@ -478,10 +498,6 @@ def check_deprecated(param, option, suggestion):
         if 'overwrites' in self.params and self.params['overwrites'] is None:
             del self.params['overwrites']
 
-        check_deprecated('autonumber_size', '--autonumber-size', 'output template with %(autonumber)0Nd, where N in the number of digits')
-        check_deprecated('autonumber', '--auto-number', '-o "%(autonumber)s-%(title)s.%(ext)s"')
-        check_deprecated('usetitle', '--title', '-o "%(title)s-%(id)s.%(ext)s"')
-
         if params.get('bidi_workaround', False):
             try:
                 import pty
@@ -523,6 +539,24 @@ def check_deprecated(param, option, suggestion):
 
         self._setup_opener()
 
+        """Preload the archive, if any is specified"""
+        def preload_download_archive(fn):
+            if fn is None:
+                return False
+            self.write_debug('Loading archive file %r\n' % fn)
+            try:
+                with locked_file(fn, 'r', encoding='utf-8') as archive_file:
+                    for line in archive_file:
+                        self.archive.add(line.strip())
+            except IOError as ioe:
+                if ioe.errno != errno.ENOENT:
+                    raise
+                return False
+            return True
+
+        self.archive = set()
+        preload_download_archive(self.params.get('download_archive'))
+
         if auto_init:
             self.print_debug_header()
             self.add_default_info_extractors()
@@ -535,7 +569,7 @@ def check_deprecated(param, option, suggestion):
                 when = pp_def['when']
                 del pp_def['when']
             else:
-                when = 'normal'
+                when = 'post_process'
             pp = pp_class(self, **compat_kwargs(pp_def))
             self.add_post_processor(pp, when=when)
 
@@ -589,7 +623,7 @@ def add_default_info_extractors(self):
         for ie in gen_extractor_classes():
             self.add_info_extractor(ie)
 
-    def add_post_processor(self, pp, when='normal'):
+    def add_post_processor(self, pp, when='post_process'):
         """Add a PostProcessor object to the end of the chain."""
         self._pps[when].append(pp)
         pp.set_downloader(self)
@@ -615,18 +649,14 @@ def _bidi_workaround(self, message):
                       for _ in range(line_count))
         return res[:-len('\n')]
 
-    def to_screen(self, message, skip_eol=False):
-        """Print message to stdout if not in quiet mode."""
-        return self.to_stdout(message, skip_eol, check_quiet=True)
-
     def _write_string(self, s, out=None):
         write_string(s, out=out, encoding=self.params.get('encoding'))
 
-    def to_stdout(self, message, skip_eol=False, check_quiet=False):
-        """Print message to stdout if not in quiet mode."""
+    def to_stdout(self, message, skip_eol=False, quiet=False):
+        """Print message to stdout"""
         if self.params.get('logger'):
             self.params['logger'].debug(message)
-        elif not check_quiet or not self.params.get('quiet', False):
+        elif not quiet:
             message = self._bidi_workaround(message)
             terminator = ['\n', ''][skip_eol]
             output = message + terminator
@@ -634,7 +664,7 @@ def to_stdout(self, message, skip_eol=False, check_quiet=False):
             self._write_string(output, self._screen_file)
 
     def to_stderr(self, message):
-        """Print message to stderr."""
+        """Print message to stderr"""
         assert isinstance(message, compat_str)
         if self.params.get('logger'):
             self.params['logger'].error(message)
@@ -712,6 +742,11 @@ def trouble(self, message=None, tb=None):
             raise DownloadError(message, exc_info)
         self._download_retcode = 1
 
+    def to_screen(self, message, skip_eol=False):
+        """Print message to stdout if not in quiet mode"""
+        self.to_stdout(
+            message, skip_eol, quiet=self.params.get('quiet', False))
+
     def report_warning(self, message):
         '''
         Print the message to stderr, it will be prefixed with 'WARNING:'
@@ -741,6 +776,16 @@ def report_error(self, message, tb=None):
         error_message = '%s %s' % (_msg_header, message)
         self.trouble(error_message, tb)
 
+    def write_debug(self, message):
+        '''Log debug message or Print message to stderr'''
+        if not self.params.get('verbose', False):
+            return
+        message = '[debug] %s' % message
+        if self.params.get('logger'):
+            self.params['logger'].debug(message)
+        else:
+            self._write_string('%s\n' % message)
+
     def report_file_already_downloaded(self, file_name):
         """Report file has already been fully downloaded."""
         try:
@@ -769,95 +814,143 @@ def parse_outtmpl(self):
                     'Put  from __future__ import unicode_literals  at the top of your code file or consider switching to Python 3.x.')
         return outtmpl_dict
 
+    def prepare_outtmpl(self, outtmpl, info_dict, sanitize=None):
+        """ Make the template and info_dict suitable for substitution (outtmpl % info_dict)"""
+        template_dict = dict(info_dict)
+        na = self.params.get('outtmpl_na_placeholder', 'NA')
+
+        # duration_string
+        template_dict['duration_string'] = (  # %(duration>%H-%M-%S)s is wrong if duration > 24hrs
+            formatSeconds(info_dict['duration'], '-' if sanitize else ':')
+            if info_dict.get('duration', None) is not None
+            else None)
+
+        # epoch
+        template_dict['epoch'] = int(time.time())
+
+        # autonumber
+        autonumber_size = self.params.get('autonumber_size')
+        if autonumber_size is None:
+            autonumber_size = 5
+        template_dict['autonumber'] = self.params.get('autonumber_start', 1) - 1 + self._num_downloads
+
+        # resolution if not defined
+        if template_dict.get('resolution') is None:
+            if template_dict.get('width') and template_dict.get('height'):
+                template_dict['resolution'] = '%dx%d' % (template_dict['width'], template_dict['height'])
+            elif template_dict.get('height'):
+                template_dict['resolution'] = '%sp' % template_dict['height']
+            elif template_dict.get('width'):
+                template_dict['resolution'] = '%dx?' % template_dict['width']
+
+        # For fields playlist_index and autonumber convert all occurrences
+        # of %(field)s to %(field)0Nd for backward compatibility
+        field_size_compat_map = {
+            'playlist_index': len(str(template_dict.get('_last_playlist_index') or '')),
+            'autonumber': autonumber_size,
+        }
+        FIELD_SIZE_COMPAT_RE = r'(?<!%)%\((?P<field>autonumber|playlist_index)\)s'
+        mobj = re.search(FIELD_SIZE_COMPAT_RE, outtmpl)
+        if mobj:
+            outtmpl = re.sub(
+                FIELD_SIZE_COMPAT_RE,
+                r'%%(\1)0%dd' % field_size_compat_map[mobj.group('field')],
+                outtmpl)
+
+        numeric_fields = list(self._NUMERIC_FIELDS)
+        if sanitize is None:
+            sanitize = lambda k, v: v
+
+        EXTERNAL_FORMAT_RE = FORMAT_RE.format('(?P<key>[^)]*)')
+        # Field is of the form key1.key2...
+        # where keys (except first) can be string, int or slice
+        FIELD_RE = r'\w+(?:\.(?:\w+|[-\d]*(?::[-\d]*){0,2}))*'
+        INTERNAL_FORMAT_RE = re.compile(r'''(?x)
+            (?P<negate>-)?
+            (?P<fields>{0})
+            (?P<maths>(?:[-+]-?(?:\d+(?:\.\d+)?|{0}))*)
+            (?:>(?P<strf_format>.+?))?
+            (?:\|(?P<default>.*?))?
+            $'''.format(FIELD_RE))
+        MATH_OPERATORS_RE = re.compile(r'(?<![-+])([-+])')
+        MATH_FUNCTIONS = {
+            '+': float.__add__,
+            '-': float.__sub__,
+        }
+        for outer_mobj in re.finditer(EXTERNAL_FORMAT_RE, outtmpl):
+            final_key = outer_mobj.group('key')
+            str_type = outer_mobj.group('type')
+            value = None
+            mobj = re.match(INTERNAL_FORMAT_RE, final_key)
+            if mobj is not None:
+                mobj = mobj.groupdict()
+                # Object traversal
+                fields = mobj['fields'].split('.')
+                value = traverse_dict(template_dict, fields)
+                # Negative
+                if mobj['negate']:
+                    value = float_or_none(value)
+                    if value is not None:
+                        value *= -1
+                # Do maths
+                if mobj['maths']:
+                    value = float_or_none(value)
+                    operator = None
+                    for item in MATH_OPERATORS_RE.split(mobj['maths'])[1:]:
+                        if item == '':
+                            value = None
+                        if value is None:
+                            break
+                        if operator:
+                            item, multiplier = (item[1:], -1) if item[0] == '-' else (item, 1)
+                            offset = float_or_none(item)
+                            if offset is None:
+                                offset = float_or_none(traverse_dict(template_dict, item.split('.')))
+                            try:
+                                value = operator(value, multiplier * offset)
+                            except (TypeError, ZeroDivisionError):
+                                value = None
+                            operator = None
+                        else:
+                            operator = MATH_FUNCTIONS[item]
+                # Datetime formatting
+                if mobj['strf_format']:
+                    value = strftime_or_none(value, mobj['strf_format'])
+                # Set default
+                if value is None and mobj['default'] is not None:
+                    value = mobj['default']
+            # Sanitize
+            if str_type in 'crs' and value is not None:  # string
+                value = sanitize('%{}'.format(str_type) % fields[-1], value)
+            else:  # numeric
+                numeric_fields.append(final_key)
+                value = float_or_none(value)
+            if value is not None:
+                template_dict[final_key] = value
+
+        # Missing numeric fields used together with integer presentation types
+        # in format specification will break the argument substitution since
+        # string NA placeholder is returned for missing fields. We will patch
+        # output template for missing fields to meet string presentation type.
+        for numeric_field in numeric_fields:
+            if template_dict.get(numeric_field) is None:
+                outtmpl = re.sub(
+                    FORMAT_RE.format(re.escape(numeric_field)),
+                    r'%({0})s'.format(numeric_field), outtmpl)
+
+        template_dict = collections.defaultdict(lambda: na, (
+            (k, v if isinstance(v, compat_numeric_types) else sanitize(k, v))
+            for k, v in template_dict.items() if v is not None))
+        return outtmpl, template_dict
+
     def _prepare_filename(self, info_dict, tmpl_type='default'):
         try:
-            template_dict = dict(info_dict)
-
-            template_dict['duration_string'] = (  # %(duration>%H-%M-%S)s is wrong if duration > 24hrs
-                formatSeconds(info_dict['duration'], '-')
-                if info_dict.get('duration', None) is not None
-                else None)
-
-            template_dict['epoch'] = int(time.time())
-            autonumber_size = self.params.get('autonumber_size')
-            if autonumber_size is None:
-                autonumber_size = 5
-            template_dict['autonumber'] = self.params.get('autonumber_start', 1) - 1 + self._num_downloads
-            if template_dict.get('resolution') is None:
-                if template_dict.get('width') and template_dict.get('height'):
-                    template_dict['resolution'] = '%dx%d' % (template_dict['width'], template_dict['height'])
-                elif template_dict.get('height'):
-                    template_dict['resolution'] = '%sp' % template_dict['height']
-                elif template_dict.get('width'):
-                    template_dict['resolution'] = '%dx?' % template_dict['width']
-
             sanitize = lambda k, v: sanitize_filename(
                 compat_str(v),
                 restricted=self.params.get('restrictfilenames'),
                 is_id=(k == 'id' or k.endswith('_id')))
-            template_dict = dict((k, v if isinstance(v, compat_numeric_types) else sanitize(k, v))
-                                 for k, v in template_dict.items()
-                                 if v is not None and not isinstance(v, (list, tuple, dict)))
-            na = self.params.get('outtmpl_na_placeholder', 'NA')
-            template_dict = collections.defaultdict(lambda: na, template_dict)
-
             outtmpl = self.outtmpl_dict.get(tmpl_type, self.outtmpl_dict['default'])
-            force_ext = OUTTMPL_TYPES.get(tmpl_type)
-
-            # For fields playlist_index and autonumber convert all occurrences
-            # of %(field)s to %(field)0Nd for backward compatibility
-            field_size_compat_map = {
-                'playlist_index': len(str(template_dict['n_entries'])),
-                'autonumber': autonumber_size,
-            }
-            FIELD_SIZE_COMPAT_RE = r'(?<!%)%\((?P<field>autonumber|playlist_index)\)s'
-            mobj = re.search(FIELD_SIZE_COMPAT_RE, outtmpl)
-            if mobj:
-                outtmpl = re.sub(
-                    FIELD_SIZE_COMPAT_RE,
-                    r'%%(\1)0%dd' % field_size_compat_map[mobj.group('field')],
-                    outtmpl)
-
-            # As of [1] format syntax is:
-            #  %[mapping_key][conversion_flags][minimum_width][.precision][length_modifier]type
-            # 1. https://docs.python.org/2/library/stdtypes.html#string-formatting
-            FORMAT_RE = r'''(?x)
-                (?<!%)
-                %
-                \({0}\)  # mapping key
-                (?:[#0\-+ ]+)?  # conversion flags (optional)
-                (?:\d+)?  # minimum field width (optional)
-                (?:\.\d+)?  # precision (optional)
-                [hlL]?  # length modifier (optional)
-                (?P<type>[diouxXeEfFgGcrs%])  # conversion type
-            '''
-
-            numeric_fields = list(self._NUMERIC_FIELDS)
-
-            # Format date
-            FORMAT_DATE_RE = FORMAT_RE.format(r'(?P<key>(?P<field>\w+)>(?P<format>.+?))')
-            for mobj in re.finditer(FORMAT_DATE_RE, outtmpl):
-                conv_type, field, frmt, key = mobj.group('type', 'field', 'format', 'key')
-                if key in template_dict:
-                    continue
-                value = strftime_or_none(template_dict.get(field), frmt, na)
-                if conv_type in 'crs':  # string
-                    value = sanitize(field, value)
-                else:  # number
-                    numeric_fields.append(key)
-                    value = float_or_none(value, default=None)
-                if value is not None:
-                    template_dict[key] = value
-
-            # Missing numeric fields used together with integer presentation types
-            # in format specification will break the argument substitution since
-            # string NA placeholder is returned for missing fields. We will patch
-            # output template for missing fields to meet string presentation type.
-            for numeric_field in numeric_fields:
-                if numeric_field not in template_dict:
-                    outtmpl = re.sub(
-                        FORMAT_RE.format(re.escape(numeric_field)),
-                        r'%({0})s'.format(numeric_field), outtmpl)
+            outtmpl, template_dict = self.prepare_outtmpl(outtmpl, info_dict, sanitize)
 
             # expand_path translates '%%' into '%' and '$$' into '$'
             # correspondingly that is not what we want since we need to keep
@@ -872,6 +965,7 @@ def _prepare_filename(self, info_dict, tmpl_type='default'):
             # title "Hello $PATH", we don't want `$PATH` to be expanded.
             filename = expand_path(outtmpl).replace(sep, '') % template_dict
 
+            force_ext = OUTTMPL_TYPES.get(tmpl_type)
             if force_ext is not None:
                 filename = replace_extension(filename, force_ext, template_dict.get('ext'))
 
@@ -977,13 +1071,22 @@ def add_extra_info(info_dict, extra_info):
         for key, value in extra_info.items():
             info_dict.setdefault(key, value)
 
-    def extract_info(self, url, download=True, ie_key=None, info_dict=None, extra_info={},
+    def extract_info(self, url, download=True, ie_key=None, extra_info={},
                      process=True, force_generic_extractor=False):
-        '''
-        Returns a list with a dictionary for each video we find.
-        If 'download', also downloads the videos.
-        extra_info is a dict containing the extra values to add to each result
-        '''
+        """
+        Return a list with a dictionary for each video extracted.
+
+        Arguments:
+        url -- URL to extract
+
+        Keyword arguments:
+        download -- whether to download videos during extraction
+        ie_key -- extractor key hint
+        extra_info -- dictionary containing the extra values to add to each result
+        process -- whether to resolve all unresolved references (URLs, playlist items),
+            must be True for download to work.
+        force_generic_extractor -- force using the generic extractor
+        """
 
         if not ie_key and force_generic_extractor:
             ie_key = 'Generic'
@@ -1013,7 +1116,7 @@ def extract_info(self, url, download=True, ie_key=None, info_dict=None, extra_in
                 self.to_screen("[%s] %s: has already been recorded in archive" % (
                                ie_key, temp_id))
                 break
-            return self.__extract_info(url, ie, download, extra_info, process, info_dict)
+            return self.__extract_info(url, ie, download, extra_info, process)
         else:
             self.report_error('no suitable InfoExtractor for URL %s' % url)
 
@@ -1040,7 +1143,7 @@ def wrapper(self, *args, **kwargs):
         return wrapper
 
     @__handle_extraction_exceptions
-    def __extract_info(self, url, ie, download, extra_info, process, info_dict):
+    def __extract_info(self, url, ie, download, extra_info, process):
         ie_result = ie.extract(url)
         if ie_result is None:  # Finished already (backwards compatibility; listformats and friends should be moved here)
             return
@@ -1050,11 +1153,6 @@ def __extract_info(self, url, ie, download, extra_info, process, info_dict):
                 '_type': 'compat_list',
                 'entries': ie_result,
             }
-        if info_dict:
-            if info_dict.get('id'):
-                ie_result['id'] = info_dict['id']
-            if info_dict.get('title'):
-                ie_result['title'] = info_dict['title']
         self.add_default_extra_info(ie_result, ie, url)
         if process:
             return self.process_ie_result(ie_result, download, extra_info)
@@ -1089,14 +1187,29 @@ def process_ie_result(self, ie_result, download=True, extra_info={}):
 
         if result_type == 'video':
             self.add_extra_info(ie_result, extra_info)
-            return self.process_video_result(ie_result, download=download)
+            ie_result = self.process_video_result(ie_result, download=download)
+            additional_urls = ie_result.get('additional_urls')
+            if additional_urls:
+                # TODO: Improve MetadataFromFieldPP to allow setting a list
+                if isinstance(additional_urls, compat_str):
+                    additional_urls = [additional_urls]
+                self.to_screen(
+                    '[info] %s: %d additional URL(s) requested' % (ie_result['id'], len(additional_urls)))
+                self.write_debug('Additional URLs: "%s"' % '", "'.join(additional_urls))
+                ie_result['additional_entries'] = [
+                    self.extract_info(
+                        url, download, extra_info,
+                        force_generic_extractor=self.params.get('force_generic_extractor'))
+                    for url in additional_urls
+                ]
+            return ie_result
         elif result_type == 'url':
             # We have to add extra_info to the results because it may be
             # contained in a playlist
-            return self.extract_info(ie_result['url'],
-                                     download, info_dict=ie_result,
-                                     ie_key=ie_result.get('ie_key'),
-                                     extra_info=extra_info)
+            return self.extract_info(
+                ie_result['url'], download,
+                ie_key=ie_result.get('ie_key'),
+                extra_info=extra_info)
         elif result_type == 'url_transparent':
             # Use the information from the embedding page
             info = self.extract_info(
@@ -1170,57 +1283,24 @@ def _fixup(r):
         else:
             raise Exception('Invalid result type: %s' % result_type)
 
+    def _ensure_dir_exists(self, path):
+        return make_dir(path, self.report_error)
+
     def __process_playlist(self, ie_result, download):
         # We process each entry in the playlist
         playlist = ie_result.get('title') or ie_result.get('id')
         self.to_screen('[download] Downloading playlist: %s' % playlist)
 
-        if self.params.get('allow_playlist_files', True):
-            ie_copy = {
-                'playlist': playlist,
-                'playlist_id': ie_result.get('id'),
-                'playlist_title': ie_result.get('title'),
-                'playlist_uploader': ie_result.get('uploader'),
-                'playlist_uploader_id': ie_result.get('uploader_id'),
-                'playlist_index': 0
-            }
-            ie_copy.update(dict(ie_result))
-
-            def ensure_dir_exists(path):
-                return make_dir(path, self.report_error)
-
-            if self.params.get('writeinfojson', False):
-                infofn = self.prepare_filename(ie_copy, 'pl_infojson')
-                if not ensure_dir_exists(encodeFilename(infofn)):
-                    return
-                if not self.params.get('overwrites', True) and os.path.exists(encodeFilename(infofn)):
-                    self.to_screen('[info] Playlist metadata is already present')
-                else:
-                    playlist_info = dict(ie_result)
-                    # playlist_info['entries'] = list(playlist_info['entries'])  # Entries is a generator which shouldnot be resolved here
-                    del playlist_info['entries']
-                    self.to_screen('[info] Writing playlist metadata as JSON to: ' + infofn)
-                    try:
-                        write_json_file(self.filter_requested_info(playlist_info), infofn)
-                    except (OSError, IOError):
-                        self.report_error('Cannot write playlist metadata to JSON file ' + infofn)
-
-            if self.params.get('writedescription', False):
-                descfn = self.prepare_filename(ie_copy, 'pl_description')
-                if not ensure_dir_exists(encodeFilename(descfn)):
-                    return
-                if not self.params.get('overwrites', True) and os.path.exists(encodeFilename(descfn)):
-                    self.to_screen('[info] Playlist description is already present')
-                elif ie_result.get('description') is None:
-                    self.report_warning('There\'s no playlist description to write.')
-                else:
-                    try:
-                        self.to_screen('[info] Writing playlist description to: ' + descfn)
-                        with io.open(encodeFilename(descfn), 'w', encoding='utf-8') as descfile:
-                            descfile.write(ie_result['description'])
-                    except (OSError, IOError):
-                        self.report_error('Cannot write playlist description file ' + descfn)
-                        return
+        if 'entries' not in ie_result:
+            raise EntryNotInPlaylist()
+        incomplete_entries = bool(ie_result.get('requested_entries'))
+        if incomplete_entries:
+            def fill_missing_entries(entries, indexes):
+                ret = [None] * max(*indexes)
+                for i, entry in zip(indexes, entries):
+                    ret[i - 1] = entry
+                return ret
+            ie_result['entries'] = fill_missing_entries(ie_result['entries'], ie_result['requested_entries'])
 
         playlist_results = []
 
@@ -1247,25 +1327,20 @@ def iter_playlistitems(format):
 
         def make_playlistitems_entries(list_ie_entries):
             num_entries = len(list_ie_entries)
-            return [
-                list_ie_entries[i - 1] for i in playlistitems
-                if -num_entries <= i - 1 < num_entries]
-
-        def report_download(num_entries):
-            self.to_screen(
-                '[%s] playlist %s: Downloading %d videos' %
-                (ie_result['extractor'], playlist, num_entries))
+            for i in playlistitems:
+                if -num_entries < i <= num_entries:
+                    yield list_ie_entries[i - 1]
+                elif incomplete_entries:
+                    raise EntryNotInPlaylist()
 
         if isinstance(ie_entries, list):
             n_all_entries = len(ie_entries)
             if playlistitems:
-                entries = make_playlistitems_entries(ie_entries)
+                entries = list(make_playlistitems_entries(ie_entries))
             else:
                 entries = ie_entries[playliststart:playlistend]
             n_entries = len(entries)
-            self.to_screen(
-                '[%s] playlist %s: Collected %d video ids (downloading %d of them)' %
-                (ie_result['extractor'], playlist, n_all_entries, n_entries))
+            msg = 'Collected %d videos; downloading %d of them' % (n_all_entries, n_entries)
         elif isinstance(ie_entries, PagedList):
             if playlistitems:
                 entries = []
@@ -1277,26 +1352,87 @@ def report_download(num_entries):
                 entries = ie_entries.getslice(
                     playliststart, playlistend)
             n_entries = len(entries)
-            report_download(n_entries)
+            msg = 'Downloading %d videos' % n_entries
         else:  # iterable
             if playlistitems:
-                entries = make_playlistitems_entries(list(itertools.islice(
-                    ie_entries, 0, max(playlistitems))))
+                entries = list(make_playlistitems_entries(list(itertools.islice(
+                    ie_entries, 0, max(playlistitems)))))
             else:
                 entries = list(itertools.islice(
                     ie_entries, playliststart, playlistend))
             n_entries = len(entries)
-            report_download(n_entries)
+            msg = 'Downloading %d videos' % n_entries
+
+        if any((entry is None for entry in entries)):
+            raise EntryNotInPlaylist()
+        if not playlistitems and (playliststart or playlistend):
+            playlistitems = list(range(1 + playliststart, 1 + playliststart + len(entries)))
+        ie_result['entries'] = entries
+        ie_result['requested_entries'] = playlistitems
+
+        if self.params.get('allow_playlist_files', True):
+            ie_copy = {
+                'playlist': playlist,
+                'playlist_id': ie_result.get('id'),
+                'playlist_title': ie_result.get('title'),
+                'playlist_uploader': ie_result.get('uploader'),
+                'playlist_uploader_id': ie_result.get('uploader_id'),
+                'playlist_index': 0,
+            }
+            ie_copy.update(dict(ie_result))
+
+            if self.params.get('writeinfojson', False):
+                infofn = self.prepare_filename(ie_copy, 'pl_infojson')
+                if not self._ensure_dir_exists(encodeFilename(infofn)):
+                    return
+                if not self.params.get('overwrites', True) and os.path.exists(encodeFilename(infofn)):
+                    self.to_screen('[info] Playlist metadata is already present')
+                else:
+                    self.to_screen('[info] Writing playlist metadata as JSON to: ' + infofn)
+                    try:
+                        write_json_file(self.filter_requested_info(ie_result, self.params.get('clean_infojson', True)), infofn)
+                    except (OSError, IOError):
+                        self.report_error('Cannot write playlist metadata to JSON file ' + infofn)
+
+            # TODO: This should be passed to ThumbnailsConvertor if necessary
+            self._write_thumbnails(ie_copy, self.prepare_filename(ie_copy, 'pl_thumbnail'))
+
+            if self.params.get('writedescription', False):
+                descfn = self.prepare_filename(ie_copy, 'pl_description')
+                if not self._ensure_dir_exists(encodeFilename(descfn)):
+                    return
+                if not self.params.get('overwrites', True) and os.path.exists(encodeFilename(descfn)):
+                    self.to_screen('[info] Playlist description is already present')
+                elif ie_result.get('description') is None:
+                    self.report_warning('There\'s no playlist description to write.')
+                else:
+                    try:
+                        self.to_screen('[info] Writing playlist description to: ' + descfn)
+                        with io.open(encodeFilename(descfn), 'w', encoding='utf-8') as descfile:
+                            descfile.write(ie_result['description'])
+                    except (OSError, IOError):
+                        self.report_error('Cannot write playlist description file ' + descfn)
+                        return
+
+        # Save playlist_index before re-ordering
+        entries = [
+            ((playlistitems[i - 1] if playlistitems else i), entry)
+            for i, entry in enumerate(entries, 1)]
 
         if self.params.get('playlistreverse', False):
             entries = entries[::-1]
-
         if self.params.get('playlistrandom', False):
             random.shuffle(entries)
 
         x_forwarded_for = ie_result.get('__x_forwarded_for_ip')
 
-        for i, entry in enumerate(entries, 1):
+        self.to_screen('[%s] playlist %s: %s' % (ie_result['extractor'], playlist, msg))
+        failures = 0
+        max_failures = self.params.get('skip_playlist_after_errors') or float('inf')
+        for i, entry_tuple in enumerate(entries, 1):
+            playlist_index, entry = entry_tuple
+            if 'playlist_index' in self.params.get('compat_options', []):
+                playlist_index = playlistitems[i - 1] if playlistitems else i
             self.to_screen('[download] Downloading video %s of %s' % (i, n_entries))
             # This __x_forwarded_for_ip thing is a bit ugly but requires
             # minimal changes
@@ -1304,12 +1440,14 @@ def report_download(num_entries):
                 entry['__x_forwarded_for_ip'] = x_forwarded_for
             extra = {
                 'n_entries': n_entries,
+                '_last_playlist_index': max(playlistitems) if playlistitems else (playlistend or n_entries),
+                'playlist_index': playlist_index,
+                'playlist_autonumber': i,
                 'playlist': playlist,
                 'playlist_id': ie_result.get('id'),
                 'playlist_title': ie_result.get('title'),
                 'playlist_uploader': ie_result.get('uploader'),
                 'playlist_uploader_id': ie_result.get('uploader_id'),
-                'playlist_index': playlistitems[i - 1] if playlistitems else i + playliststart,
                 'extractor': ie_result['extractor'],
                 'webpage_url': ie_result['webpage_url'],
                 'webpage_url_basename': url_basename(ie_result['webpage_url']),
@@ -1320,6 +1458,12 @@ def report_download(num_entries):
                 continue
 
             entry_result = self.__process_iterable_entry(entry, download, extra)
+            if not entry_result:
+                failures += 1
+            if failures >= max_failures:
+                self.report_error(
+                    'Skipping the remaining entries in playlist "%s" since %d items failed extraction' % (playlist, failures))
+                break
             # TODO: skip failed (empty) entries?
             playlist_results.append(entry_result)
         ie_result['entries'] = playlist_results
@@ -1407,12 +1551,14 @@ def can_merge():
                 not can_merge()
                 or info_dict.get('is_live', False)
                 or self.outtmpl_dict['default'] == '-'))
+        compat = (
+            prefer_best
+            or self.params.get('allow_multiple_audio_streams', False)
+            or 'format-spec' in self.params.get('compat_opts', []))
 
         return (
-            'best/bestvideo+bestaudio'
-            if prefer_best
-            else 'bestvideo*+bestaudio/best'
-            if not self.params.get('allow_multiple_audio_streams', False)
+            'best/bestvideo+bestaudio' if prefer_best
+            else 'bestvideo*+bestaudio/best' if not compat
             else 'bestvideo+bestaudio/best')
 
     def build_format_selector(self, format_spec):
@@ -1431,6 +1577,8 @@ def syntax_error(note, start):
         allow_multiple_streams = {'audio': self.params.get('allow_multiple_audio_streams', False),
                                   'video': self.params.get('allow_multiple_video_streams', False)}
 
+        check_formats = self.params.get('check_formats')
+
         def _parse_filter(tokens):
             filter_parts = []
             for type, string, start, _, _ in tokens:
@@ -1528,6 +1676,86 @@ def _parse_format_selection(tokens, inside_merge=False, inside_choice=False, ins
                 selectors.append(current_selector)
             return selectors
 
+        def _merge(formats_pair):
+            format_1, format_2 = formats_pair
+
+            formats_info = []
+            formats_info.extend(format_1.get('requested_formats', (format_1,)))
+            formats_info.extend(format_2.get('requested_formats', (format_2,)))
+
+            if not allow_multiple_streams['video'] or not allow_multiple_streams['audio']:
+                get_no_more = {"video": False, "audio": False}
+                for (i, fmt_info) in enumerate(formats_info):
+                    for aud_vid in ["audio", "video"]:
+                        if not allow_multiple_streams[aud_vid] and fmt_info.get(aud_vid[0] + 'codec') != 'none':
+                            if get_no_more[aud_vid]:
+                                formats_info.pop(i)
+                            get_no_more[aud_vid] = True
+
+            if len(formats_info) == 1:
+                return formats_info[0]
+
+            video_fmts = [fmt_info for fmt_info in formats_info if fmt_info.get('vcodec') != 'none']
+            audio_fmts = [fmt_info for fmt_info in formats_info if fmt_info.get('acodec') != 'none']
+
+            the_only_video = video_fmts[0] if len(video_fmts) == 1 else None
+            the_only_audio = audio_fmts[0] if len(audio_fmts) == 1 else None
+
+            output_ext = self.params.get('merge_output_format')
+            if not output_ext:
+                if the_only_video:
+                    output_ext = the_only_video['ext']
+                elif the_only_audio and not video_fmts:
+                    output_ext = the_only_audio['ext']
+                else:
+                    output_ext = 'mkv'
+
+            new_dict = {
+                'requested_formats': formats_info,
+                'format': '+'.join(fmt_info.get('format') for fmt_info in formats_info),
+                'format_id': '+'.join(fmt_info.get('format_id') for fmt_info in formats_info),
+                'ext': output_ext,
+            }
+
+            if the_only_video:
+                new_dict.update({
+                    'width': the_only_video.get('width'),
+                    'height': the_only_video.get('height'),
+                    'resolution': the_only_video.get('resolution') or self.format_resolution(the_only_video),
+                    'fps': the_only_video.get('fps'),
+                    'vcodec': the_only_video.get('vcodec'),
+                    'vbr': the_only_video.get('vbr'),
+                    'stretched_ratio': the_only_video.get('stretched_ratio'),
+                })
+
+            if the_only_audio:
+                new_dict.update({
+                    'acodec': the_only_audio.get('acodec'),
+                    'abr': the_only_audio.get('abr'),
+                })
+
+            return new_dict
+
+        def _check_formats(formats):
+            for f in formats:
+                self.to_screen('[info] Testing format %s' % f['format_id'])
+                paths = self.params.get('paths', {})
+                temp_file = os.path.join(
+                    expand_path(paths.get('home', '').strip()),
+                    expand_path(paths.get('temp', '').strip()),
+                    'ytdl.%s.f%s.check-format' % (random_uuidv4(), f['format_id']))
+                try:
+                    dl, _ = self.dl(temp_file, f, test=True)
+                except (ExtractorError, IOError, OSError, ValueError) + network_exceptions:
+                    dl = False
+                finally:
+                    if os.path.exists(temp_file):
+                        os.remove(temp_file)
+                if dl:
+                    yield f
+                else:
+                    self.to_screen('[info] Unable to download format %s. Skipping...' % f['format_id'])
+
         def _build_selector_function(selector):
             if isinstance(selector, list):  # ,
                 fs = [_build_selector_function(s) for s in selector]
@@ -1552,34 +1780,48 @@ def selector_function(ctx):
                     return []
 
             elif selector.type == SINGLE:  # atom
-                format_spec = selector.selector if selector.selector is not None else 'best'
+                format_spec = selector.selector or 'best'
 
+                # TODO: Add allvideo, allaudio etc by generalizing the code with best/worst selector
                 if format_spec == 'all':
                     def selector_function(ctx):
                         formats = list(ctx['formats'])
-                        if formats:
-                            for f in formats:
-                                yield f
+                        if check_formats:
+                            formats = _check_formats(formats)
+                        for f in formats:
+                            yield f
+                elif format_spec == 'mergeall':
+                    def selector_function(ctx):
+                        formats = list(_check_formats(ctx['formats']))
+                        if not formats:
+                            return
+                        merged_format = formats[-1]
+                        for f in formats[-2::-1]:
+                            merged_format = _merge((merged_format, f))
+                        yield merged_format
 
                 else:
-                    format_fallback = False
-                    format_spec_obj = re.match(r'(best|worst|b|w)(video|audio|v|a)?(\*)?$', format_spec)
-                    if format_spec_obj is not None:
-                        format_idx = 0 if format_spec_obj.group(1)[0] == 'w' else -1
-                        format_type = format_spec_obj.group(2)[0] if format_spec_obj.group(2) else False
-                        not_format_type = 'v' if format_type == 'a' else 'a'
-                        format_modified = format_spec_obj.group(3) is not None
+                    format_fallback, format_reverse, format_idx = False, True, 1
+                    mobj = re.match(
+                        r'(?P<bw>best|worst|b|w)(?P<type>video|audio|v|a)?(?P<mod>\*)?(?:\.(?P<n>[1-9]\d*))?$',
+                        format_spec)
+                    if mobj is not None:
+                        format_idx = int_or_none(mobj.group('n'), default=1)
+                        format_reverse = mobj.group('bw')[0] == 'b'
+                        format_type = (mobj.group('type') or [None])[0]
+                        not_format_type = {'v': 'a', 'a': 'v'}.get(format_type)
+                        format_modified = mobj.group('mod') is not None
 
                         format_fallback = not format_type and not format_modified  # for b, w
-                        filter_f = ((lambda f: f.get(format_type + 'codec') != 'none')
-                                    if format_type and format_modified  # bv*, ba*, wv*, wa*
-                                    else (lambda f: f.get(not_format_type + 'codec') == 'none')
-                                    if format_type  # bv, ba, wv, wa
-                                    else (lambda f: f.get('vcodec') != 'none' and f.get('acodec') != 'none')
-                                    if not format_modified  # b, w
-                                    else None)  # b*, w*
+                        filter_f = (
+                            (lambda f: f.get('%scodec' % format_type) != 'none')
+                            if format_type and format_modified  # bv*, ba*, wv*, wa*
+                            else (lambda f: f.get('%scodec' % not_format_type) == 'none')
+                            if format_type  # bv, ba, wv, wa
+                            else (lambda f: f.get('vcodec') != 'none' and f.get('acodec') != 'none')
+                            if not format_modified  # b, w
+                            else None)  # b*, w*
                     else:
-                        format_idx = -1
                         filter_f = ((lambda f: f.get('ext') == format_spec)
                                     if format_spec in ['mp4', 'flv', 'webm', '3gp', 'm4a', 'mp3', 'ogg', 'aac', 'wav']  # extension
                                     else (lambda f: f.get('format_id') == format_spec))  # id
@@ -1589,75 +1831,20 @@ def selector_function(ctx):
                         if not formats:
                             return
                         matches = list(filter(filter_f, formats)) if filter_f is not None else formats
-                        if matches:
-                            yield matches[format_idx]
-                        elif format_fallback == 'force' or (format_fallback and ctx['incomplete_formats']):
+                        if format_fallback and ctx['incomplete_formats'] and not matches:
                             # for extractors with incomplete formats (audio only (soundcloud)
                             # or video only (imgur)) best/worst will fallback to
                             # best/worst {video,audio}-only format
-                            yield formats[format_idx]
+                            matches = formats
+                        if format_reverse:
+                            matches = matches[::-1]
+                        if check_formats:
+                            matches = list(itertools.islice(_check_formats(matches), format_idx))
+                        n = len(matches)
+                        if -n <= format_idx - 1 < n:
+                            yield matches[format_idx - 1]
 
             elif selector.type == MERGE:        # +
-                def _merge(formats_pair):
-                    format_1, format_2 = formats_pair
-
-                    formats_info = []
-                    formats_info.extend(format_1.get('requested_formats', (format_1,)))
-                    formats_info.extend(format_2.get('requested_formats', (format_2,)))
-
-                    if not allow_multiple_streams['video'] or not allow_multiple_streams['audio']:
-                        get_no_more = {"video": False, "audio": False}
-                        for (i, fmt_info) in enumerate(formats_info):
-                            for aud_vid in ["audio", "video"]:
-                                if not allow_multiple_streams[aud_vid] and fmt_info.get(aud_vid[0] + 'codec') != 'none':
-                                    if get_no_more[aud_vid]:
-                                        formats_info.pop(i)
-                                    get_no_more[aud_vid] = True
-
-                    if len(formats_info) == 1:
-                        return formats_info[0]
-
-                    video_fmts = [fmt_info for fmt_info in formats_info if fmt_info.get('vcodec') != 'none']
-                    audio_fmts = [fmt_info for fmt_info in formats_info if fmt_info.get('acodec') != 'none']
-
-                    the_only_video = video_fmts[0] if len(video_fmts) == 1 else None
-                    the_only_audio = audio_fmts[0] if len(audio_fmts) == 1 else None
-
-                    output_ext = self.params.get('merge_output_format')
-                    if not output_ext:
-                        if the_only_video:
-                            output_ext = the_only_video['ext']
-                        elif the_only_audio and not video_fmts:
-                            output_ext = the_only_audio['ext']
-                        else:
-                            output_ext = 'mkv'
-
-                    new_dict = {
-                        'requested_formats': formats_info,
-                        'format': '+'.join(fmt_info.get('format') for fmt_info in formats_info),
-                        'format_id': '+'.join(fmt_info.get('format_id') for fmt_info in formats_info),
-                        'ext': output_ext,
-                    }
-
-                    if the_only_video:
-                        new_dict.update({
-                            'width': the_only_video.get('width'),
-                            'height': the_only_video.get('height'),
-                            'resolution': the_only_video.get('resolution'),
-                            'fps': the_only_video.get('fps'),
-                            'vcodec': the_only_video.get('vcodec'),
-                            'vbr': the_only_video.get('vbr'),
-                            'stretched_ratio': the_only_video.get('stretched_ratio'),
-                        })
-
-                    if the_only_audio:
-                        new_dict.update({
-                            'acodec': the_only_audio.get('acodec'),
-                            'abr': the_only_audio.get('abr'),
-                        })
-
-                    return new_dict
-
                 selector_1, selector_2 = map(_build_selector_function, selector.selector)
 
                 def selector_function(ctx):
@@ -1772,7 +1959,8 @@ def sanitize_numeric_fields(info):
                 t.get('preference') if t.get('preference') is not None else -1,
                 t.get('width') if t.get('width') is not None else -1,
                 t.get('height') if t.get('height') is not None else -1,
-                t.get('id') if t.get('id') is not None else '', t.get('url')))
+                t.get('id') if t.get('id') is not None else '',
+                t.get('url')))
             for i, t in enumerate(thumbnails):
                 t['url'] = sanitize_url(t['url'])
                 if t.get('width') and t.get('height'):
@@ -1793,14 +1981,18 @@ def sanitize_numeric_fields(info):
         if 'display_id' not in info_dict and 'id' in info_dict:
             info_dict['display_id'] = info_dict['id']
 
-        if info_dict.get('upload_date') is None and info_dict.get('timestamp') is not None:
-            # Working around out-of-range timestamp values (e.g. negative ones on Windows,
-            # see http://bugs.python.org/issue1646728)
-            try:
-                upload_date = datetime.datetime.utcfromtimestamp(info_dict['timestamp'])
-                info_dict['upload_date'] = upload_date.strftime('%Y%m%d')
-            except (ValueError, OverflowError, OSError):
-                pass
+        for ts_key, date_key in (
+                ('timestamp', 'upload_date'),
+                ('release_timestamp', 'release_date'),
+        ):
+            if info_dict.get(date_key) is None and info_dict.get(ts_key) is not None:
+                # Working around out-of-range timestamp values (e.g. negative ones on Windows,
+                # see http://bugs.python.org/issue1646728)
+                try:
+                    upload_date = datetime.datetime.utcfromtimestamp(info_dict[ts_key])
+                    info_dict[date_key] = upload_date.strftime('%Y%m%d')
+                except (ValueError, OverflowError, OSError):
+                    pass
 
         # Auto generate title fields corresponding to the *_number fields when missing
         # in order to always have clean titles. This is very common for TV series.
@@ -1839,7 +2031,10 @@ def sanitize_numeric_fields(info):
             formats = info_dict['formats']
 
         if not formats:
-            raise ExtractorError('No video formats found!')
+            if not self.params.get('ignore_no_formats_error'):
+                raise ExtractorError('No video formats found!')
+            else:
+                self.report_warning('No video formats found!')
 
         def is_wellformed(f):
             url = f.get('url')
@@ -1903,21 +2098,25 @@ def is_wellformed(f):
 
         # TODO Central sorting goes here
 
-        if formats[0] is not info_dict:
+        if formats and formats[0] is not info_dict:
             # only set the 'formats' fields if the original info_dict list them
             # otherwise we end up with a circular reference, the first (and unique)
             # element in the 'formats' field in info_dict is info_dict itself,
             # which can't be exported to json
             info_dict['formats'] = formats
+
+        info_dict, _ = self.pre_process(info_dict)
+
         if self.params.get('listformats'):
+            if not info_dict.get('formats'):
+                raise ExtractorError('No video formats found', expected=True)
             self.list_formats(info_dict)
             return
 
         req_format = self.params.get('format')
         if req_format is None:
             req_format = self._default_format_spec(info_dict, download=download)
-            if self.params.get('verbose'):
-                self.to_screen('[debug] Default format spec: %s' % req_format)
+            self.write_debug('Default format spec: %s' % req_format)
 
         format_selector = self.build_format_selector(req_format)
 
@@ -1949,19 +2148,24 @@ def is_wellformed(f):
 
         formats_to_download = list(format_selector(ctx))
         if not formats_to_download:
-            raise ExtractorError('requested format not available',
-                                 expected=True)
-
-        if download:
-            self.to_screen('[info] Downloading format(s) %s' % ", ".join([f['format_id'] for f in formats_to_download]))
-            if len(formats_to_download) > 1:
-                self.to_screen('[info] %s: downloading video in %s formats' % (info_dict['id'], len(formats_to_download)))
-            for format in formats_to_download:
+            if not self.params.get('ignore_no_formats_error'):
+                raise ExtractorError('Requested format is not available', expected=True)
+            else:
+                self.report_warning('Requested format is not available')
+        elif download:
+            self.to_screen(
+                '[info] %s: Downloading %d format(s): %s' % (
+                    info_dict['id'], len(formats_to_download),
+                    ", ".join([f['format_id'] for f in formats_to_download])))
+            for fmt in formats_to_download:
                 new_info = dict(info_dict)
-                new_info.update(format)
+                # Save a reference to the original info_dict so that it can be modified in process_info if needed
+                new_info['__original_infodict'] = info_dict
+                new_info.update(fmt)
                 self.process_info(new_info)
         # We update the info dict with the best quality format (backwards compatibility)
-        info_dict.update(formats_to_download[-1])
+        if formats_to_download:
+            info_dict.update(formats_to_download[-1])
         return info_dict
 
     def process_subtitles(self, video_id, normal_subtitles, automatic_captions):
@@ -1979,15 +2183,29 @@ def process_subtitles(self, video_id, normal_subtitles, automatic_captions):
                 available_subs):
             return None
 
+        all_sub_langs = available_subs.keys()
         if self.params.get('allsubtitles', False):
-            requested_langs = available_subs.keys()
+            requested_langs = all_sub_langs
+        elif self.params.get('subtitleslangs', False):
+            requested_langs = set()
+            for lang in self.params.get('subtitleslangs'):
+                if lang == 'all':
+                    requested_langs.update(all_sub_langs)
+                    continue
+                discard = lang[0] == '-'
+                if discard:
+                    lang = lang[1:]
+                current_langs = filter(re.compile(lang + '$').match, all_sub_langs)
+                if discard:
+                    for lang in current_langs:
+                        requested_langs.discard(lang)
+                else:
+                    requested_langs.update(current_langs)
+        elif 'en' in available_subs:
+            requested_langs = ['en']
         else:
-            if self.params.get('subtitleslangs', False):
-                requested_langs = self.params.get('subtitleslangs')
-            elif 'en' in available_subs:
-                requested_langs = ['en']
-            else:
-                requested_langs = [list(available_subs.keys())[0]]
+            requested_langs = [list(all_sub_langs)[0]]
+        self.write_debug('Downloading subtitles: %s' % ', '.join(requested_langs))
 
         formats_query = self.params.get('subtitlesformat', 'best')
         formats_preference = formats_query.split('/') if formats_query else []
@@ -2014,34 +2232,73 @@ def process_subtitles(self, video_id, normal_subtitles, automatic_captions):
         return subs
 
     def __forced_printings(self, info_dict, filename, incomplete):
-        def print_mandatory(field):
+        def print_mandatory(field, actual_field=None):
+            if actual_field is None:
+                actual_field = field
             if (self.params.get('force%s' % field, False)
-                    and (not incomplete or info_dict.get(field) is not None)):
-                self.to_stdout(info_dict[field])
+                    and (not incomplete or info_dict.get(actual_field) is not None)):
+                self.to_stdout(info_dict[actual_field])
 
         def print_optional(field):
             if (self.params.get('force%s' % field, False)
                     and info_dict.get(field) is not None):
                 self.to_stdout(info_dict[field])
 
+        info_dict = info_dict.copy()
+        if filename is not None:
+            info_dict['filename'] = filename
+        if info_dict.get('requested_formats') is not None:
+            # For RTMP URLs, also include the playpath
+            info_dict['urls'] = '\n'.join(f['url'] + f.get('play_path', '') for f in info_dict['requested_formats'])
+        elif 'url' in info_dict:
+            info_dict['urls'] = info_dict['url'] + info_dict.get('play_path', '')
+
+        for tmpl in self.params.get('forceprint', []):
+            if re.match(r'\w+$', tmpl):
+                tmpl = '%({})s'.format(tmpl)
+            tmpl, info_copy = self.prepare_outtmpl(tmpl, info_dict)
+            self.to_stdout(tmpl % info_copy)
+
         print_mandatory('title')
         print_mandatory('id')
-        if self.params.get('forceurl', False) and not incomplete:
-            if info_dict.get('requested_formats') is not None:
-                for f in info_dict['requested_formats']:
-                    self.to_stdout(f['url'] + f.get('play_path', ''))
-            else:
-                # For RTMP URLs, also include the playpath
-                self.to_stdout(info_dict['url'] + info_dict.get('play_path', ''))
+        print_mandatory('url', 'urls')
         print_optional('thumbnail')
         print_optional('description')
-        if self.params.get('forcefilename', False) and filename is not None:
-            self.to_stdout(filename)
+        print_optional('filename')
         if self.params.get('forceduration', False) and info_dict.get('duration') is not None:
             self.to_stdout(formatSeconds(info_dict['duration']))
         print_mandatory('format')
+
         if self.params.get('forcejson', False):
-            self.to_stdout(json.dumps(info_dict))
+            self.post_extract(info_dict)
+            self.to_stdout(json.dumps(info_dict, default=repr))
+
+    def dl(self, name, info, subtitle=False, test=False):
+
+        if test:
+            verbose = self.params.get('verbose')
+            params = {
+                'test': True,
+                'quiet': not verbose,
+                'verbose': verbose,
+                'noprogress': not verbose,
+                'nopart': True,
+                'skip_unavailable_fragments': False,
+                'keep_fragments': False,
+                'overwrites': True,
+                '_no_ytdl_file': True,
+            }
+        else:
+            params = self.params
+        fd = get_suitable_downloader(info, params)(self, params)
+        if not test:
+            for ph in self._progress_hooks:
+                fd.add_progress_hook(ph)
+            self.write_debug('Invoking downloader on %r' % info.get('url'))
+        new_info = dict(info)
+        if new_info.get('http_headers') is None:
+            new_info['http_headers'] = self._calc_headers(new_info)
+        return fd.download(name, new_info, subtitle)
 
     def process_info(self, info_dict):
         """Process a single resolved IE result."""
@@ -2064,14 +2321,13 @@ def process_info(self, info_dict):
         if self._match_entry(info_dict, incomplete=False) is not None:
             return
 
+        self.post_extract(info_dict)
         self._num_downloads += 1
 
-        info_dict = self.pre_process(info_dict)
-
+        # info_dict['_filename'] needs to be set for backward compatibility
         info_dict['_filename'] = full_filename = self.prepare_filename(info_dict, warn=True)
         temp_filename = self.prepare_filename(info_dict, 'temp')
         files_to_move = {}
-        skip_dl = self.params.get('skip_download', False)
 
         # Forced printings
         self.__forced_printings(info_dict, full_filename, incomplete=False)
@@ -2086,17 +2342,14 @@ def process_info(self, info_dict):
         if full_filename is None:
             return
 
-        def ensure_dir_exists(path):
-            return make_dir(path, self.report_error)
-
-        if not ensure_dir_exists(encodeFilename(full_filename)):
+        if not self._ensure_dir_exists(encodeFilename(full_filename)):
             return
-        if not ensure_dir_exists(encodeFilename(temp_filename)):
+        if not self._ensure_dir_exists(encodeFilename(temp_filename)):
             return
 
         if self.params.get('writedescription', False):
             descfn = self.prepare_filename(info_dict, 'description')
-            if not ensure_dir_exists(encodeFilename(descfn)):
+            if not self._ensure_dir_exists(encodeFilename(descfn)):
                 return
             if not self.params.get('overwrites', True) and os.path.exists(encodeFilename(descfn)):
                 self.to_screen('[info] Video description is already present')
@@ -2113,7 +2366,7 @@ def ensure_dir_exists(path):
 
         if self.params.get('writeannotations', False):
             annofn = self.prepare_filename(info_dict, 'annotation')
-            if not ensure_dir_exists(encodeFilename(annofn)):
+            if not self._ensure_dir_exists(encodeFilename(annofn)):
                 return
             if not self.params.get('overwrites', True) and os.path.exists(encodeFilename(annofn)):
                 self.to_screen('[info] Video annotations are already present')
@@ -2130,14 +2383,6 @@ def ensure_dir_exists(path):
                     self.report_error('Cannot write annotations file: ' + annofn)
                     return
 
-        def dl(name, info, subtitle=False):
-            fd = get_suitable_downloader(info, self.params)(self, self.params)
-            for ph in self._progress_hooks:
-                fd.add_progress_hook(ph)
-            if self.params.get('verbose'):
-                self.to_screen('[debug] Invoking downloader on %r' % info.get('url'))
-            return fd.download(name, info, subtitle)
-
         subtitles_are_requested = any([self.params.get('writesubtitles', False),
                                        self.params.get('writeautomaticsub')])
 
@@ -2148,13 +2393,12 @@ def dl(name, info, subtitle=False):
             # ie = self.get_info_extractor(info_dict['extractor_key'])
             for sub_lang, sub_info in subtitles.items():
                 sub_format = sub_info['ext']
-                sub_fn = self.prepare_filename(info_dict, 'subtitle')
-                sub_filename = subtitles_filename(
-                    temp_filename if not skip_dl else sub_fn,
-                    sub_lang, sub_format, info_dict.get('ext'))
-                sub_filename_final = subtitles_filename(sub_fn, sub_lang, sub_format, info_dict.get('ext'))
+                sub_filename = subtitles_filename(temp_filename, sub_lang, sub_format, info_dict.get('ext'))
+                sub_filename_final = subtitles_filename(
+                    self.prepare_filename(info_dict, 'subtitle'), sub_lang, sub_format, info_dict.get('ext'))
                 if not self.params.get('overwrites', True) and os.path.exists(encodeFilename(sub_filename)):
                     self.to_screen('[info] Video subtitle %s.%s is already present' % (sub_lang, sub_format))
+                    sub_info['filepath'] = sub_filename
                     files_to_move[sub_filename] = sub_filename_final
                 else:
                     self.to_screen('[info] Writing video subtitles to: ' + sub_filename)
@@ -2164,62 +2408,41 @@ def dl(name, info, subtitle=False):
                             # See https://github.com/ytdl-org/youtube-dl/issues/10268
                             with io.open(encodeFilename(sub_filename), 'w', encoding='utf-8', newline='') as subfile:
                                 subfile.write(sub_info['data'])
+                            sub_info['filepath'] = sub_filename
                             files_to_move[sub_filename] = sub_filename_final
                         except (OSError, IOError):
                             self.report_error('Cannot write subtitles file ' + sub_filename)
                             return
                     else:
                         try:
-                            dl(sub_filename, sub_info, subtitle=True)
+                            self.dl(sub_filename, sub_info.copy(), subtitle=True)
+                            sub_info['filepath'] = sub_filename
                             files_to_move[sub_filename] = sub_filename_final
-                        except (ExtractorError, IOError, OSError, ValueError, compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
+                        except (ExtractorError, IOError, OSError, ValueError) + network_exceptions as err:
                             self.report_warning('Unable to download subtitle for "%s": %s' %
                                                 (sub_lang, error_to_compat_str(err)))
                             continue
 
-        if skip_dl:
-            if self.params.get('convertsubtitles', False):
-                # subconv = FFmpegSubtitlesConvertorPP(self, format=self.params.get('convertsubtitles'))
-                filename_real_ext = os.path.splitext(full_filename)[1][1:]
-                filename_wo_ext = (
-                    os.path.splitext(full_filename)[0]
-                    if filename_real_ext == info_dict['ext']
-                    else full_filename)
-                afilename = '%s.%s' % (filename_wo_ext, self.params.get('convertsubtitles'))
-                # if subconv.available:
-                #     info_dict['__postprocessors'].append(subconv)
-                if os.path.exists(encodeFilename(afilename)):
-                    self.to_screen(
-                        '[download] %s has already been downloaded and '
-                        'converted' % afilename)
-                else:
-                    try:
-                        self.post_process(full_filename, info_dict, files_to_move)
-                    except PostProcessingError as err:
-                        self.report_error('Postprocessing: %s' % str(err))
-                        return
-
         if self.params.get('writeinfojson', False):
             infofn = self.prepare_filename(info_dict, 'infojson')
-            if not ensure_dir_exists(encodeFilename(infofn)):
+            if not self._ensure_dir_exists(encodeFilename(infofn)):
                 return
             if not self.params.get('overwrites', True) and os.path.exists(encodeFilename(infofn)):
                 self.to_screen('[info] Video metadata is already present')
             else:
                 self.to_screen('[info] Writing video metadata as JSON to: ' + infofn)
                 try:
-                    write_json_file(self.filter_requested_info(info_dict), infofn)
+                    write_json_file(self.filter_requested_info(info_dict, self.params.get('clean_infojson', True)), infofn)
                 except (OSError, IOError):
                     self.report_error('Cannot write video metadata to JSON file ' + infofn)
                     return
             info_dict['__infojson_filename'] = infofn
 
-        thumbfn = self.prepare_filename(info_dict, 'thumbnail')
-        thumb_fn_temp = temp_filename if not skip_dl else thumbfn
-        for thumb_ext in self._write_thumbnails(info_dict, thumb_fn_temp):
-            thumb_filename_temp = replace_extension(thumb_fn_temp, thumb_ext, info_dict.get('ext'))
-            thumb_filename = replace_extension(thumbfn, thumb_ext, info_dict.get('ext'))
-            files_to_move[thumb_filename_temp] = info_dict['__thumbnail_filename'] = thumb_filename
+        for thumb_ext in self._write_thumbnails(info_dict, temp_filename):
+            thumb_filename_temp = replace_extension(temp_filename, thumb_ext, info_dict.get('ext'))
+            thumb_filename = replace_extension(
+                self.prepare_filename(info_dict, 'thumbnail'), thumb_ext, info_dict.get('ext'))
+            files_to_move[thumb_filename_temp] = thumb_filename
 
         # Write internet shortcut files
         url_link = webloc_link = desktop_link = False
@@ -2270,9 +2493,20 @@ def _write_link_file(extension, template, newline, embed_filename):
             if not _write_link_file('desktop', DOT_DESKTOP_LINK_TEMPLATE, '\n', embed_filename=True):
                 return
 
-        # Download
+        try:
+            info_dict, files_to_move = self.pre_process(info_dict, 'before_dl', files_to_move)
+        except PostProcessingError as err:
+            self.report_error('Preprocessing: %s' % str(err))
+            return
+
         must_record_download_archive = False
-        if not skip_dl:
+        if self.params.get('skip_download', False):
+            info_dict['filepath'] = temp_filename
+            info_dict['__finaldir'] = os.path.dirname(os.path.abspath(encodeFilename(full_filename)))
+            info_dict['__files_to_move'] = files_to_move
+            info_dict = self.run_pp(MoveFilesAfterDownloadPP(self, False), info_dict)
+        else:
+            # Download
             try:
 
                 def existing_file(*filepaths):
@@ -2332,10 +2566,17 @@ def compatible_formats(formats):
 
                     requested_formats = info_dict['requested_formats']
                     old_ext = info_dict['ext']
-                    if self.params.get('merge_output_format') is None and not compatible_formats(requested_formats):
-                        info_dict['ext'] = 'mkv'
-                        self.report_warning(
-                            'Requested formats are incompatible for merge and will be merged into mkv.')
+                    if self.params.get('merge_output_format') is None:
+                        if not compatible_formats(requested_formats):
+                            info_dict['ext'] = 'mkv'
+                            self.report_warning(
+                                'Requested formats are incompatible for merge and will be merged into mkv.')
+                        if (info_dict['ext'] == 'webm'
+                                and self.params.get('writethumbnail', False)
+                                and info_dict.get('thumbnails')):
+                            info_dict['ext'] = 'mkv'
+                            self.report_warning(
+                                'webm doesn\'t support embedding a thumbnail, mkv will be used.')
 
                     def correct_ext(filename):
                         filename_real_ext = os.path.splitext(filename)[1][1:]
@@ -2357,10 +2598,10 @@ def correct_ext(filename):
                             fname = prepend_extension(
                                 self.prepare_filename(new_info, 'temp'),
                                 'f%s' % f['format_id'], new_info['ext'])
-                            if not ensure_dir_exists(fname):
+                            if not self._ensure_dir_exists(fname):
                                 return
                             downloaded.append(fname)
-                            partial_success, real_download = dl(fname, new_info)
+                            partial_success, real_download = self.dl(fname, new_info)
                             info_dict['__real_download'] = info_dict['__real_download'] or real_download
                             success = success and partial_success
                         if merger.available and not self.params.get('allow_unplayable_formats'):
@@ -2375,13 +2616,13 @@ def correct_ext(filename):
                     # Just a single file
                     dl_filename = existing_file(full_filename, temp_filename)
                     if dl_filename is None:
-                        success, real_download = dl(temp_filename, info_dict)
+                        success, real_download = self.dl(temp_filename, info_dict)
                         info_dict['__real_download'] = real_download
 
                 dl_filename = dl_filename or temp_filename
                 info_dict['__finaldir'] = os.path.dirname(os.path.abspath(encodeFilename(full_filename)))
 
-            except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
+            except network_exceptions as err:
                 self.report_error('unable to download video data: %s' % error_to_compat_str(err))
                 return
             except (OSError, IOError) as err:
@@ -2434,9 +2675,8 @@ def correct_ext(filename):
                     else:
                         assert fixup_policy in ('ignore', 'never')
 
-                if (info_dict.get('protocol') == 'm3u8_native'
-                        or info_dict.get('protocol') == 'm3u8'
-                        and self.params.get('hls_prefer_native')):
+                if ('protocol' in info_dict
+                        and get_suitable_downloader(info_dict, self.params).__name__ == 'HlsFD'):
                     if fixup_policy == 'warn':
                         self.report_warning('%s: malformed AAC bitstream detected.' % (
                             info_dict['id']))
@@ -2452,13 +2692,13 @@ def correct_ext(filename):
                         assert fixup_policy in ('ignore', 'never')
 
                 try:
-                    self.post_process(dl_filename, info_dict, files_to_move)
+                    info_dict = self.post_process(dl_filename, info_dict, files_to_move)
                 except PostProcessingError as err:
                     self.report_error('Postprocessing: %s' % str(err))
                     return
                 try:
                     for ph in self._post_hooks:
-                        ph(full_filename)
+                        ph(info_dict['filepath'])
                 except Exception as err:
                     self.report_error('post hooks: %s' % str(err))
                     return
@@ -2497,7 +2737,8 @@ def download(self, url_list):
                 raise
             else:
                 if self.params.get('dump_single_json', False):
-                    self.to_stdout(json.dumps(res))
+                    self.post_extract(res)
+                    self.to_stdout(json.dumps(res, default=repr))
 
         return self._download_retcode
 
@@ -2506,10 +2747,10 @@ def download_with_info_file(self, info_filename):
                 [info_filename], mode='r',
                 openhook=fileinput.hook_encoded('utf-8'))) as f:
             # FileInput doesn't have a read method, we can't call json.load
-            info = self.filter_requested_info(json.loads('\n'.join(f)))
+            info = self.filter_requested_info(json.loads('\n'.join(f)), self.params.get('clean_infojson', True))
         try:
             self.process_ie_result(info, download=True)
-        except DownloadError:
+        except (DownloadError, EntryNotInPlaylist):
             webpage_url = info.get('webpage_url')
             if webpage_url is not None:
                 self.report_warning('The info failed to download, trying with "%s"' % webpage_url)
@@ -2519,21 +2760,33 @@ def download_with_info_file(self, info_filename):
         return self._download_retcode
 
     @staticmethod
-    def filter_requested_info(info_dict):
-        fields_to_remove = ('requested_formats', 'requested_subtitles')
-        return dict(
-            (k, v) for k, v in info_dict.items()
-            if (k[0] != '_' or k == '_type') and k not in fields_to_remove)
-
-    def run_pp(self, pp, infodict, files_to_move={}):
+    def filter_requested_info(info_dict, actually_filter=True):
+        info_dict.pop('__original_infodict', None)  # Always remove this
+        if not actually_filter:
+            info_dict['epoch'] = int(time.time())
+            return info_dict
+        exceptions = {
+            'remove': ['requested_formats', 'requested_subtitles', 'requested_entries', 'filepath', 'entries'],
+            'keep': ['_type'],
+        }
+        keep_key = lambda k: k in exceptions['keep'] or not (k.startswith('_') or k in exceptions['remove'])
+        filter_fn = lambda obj: (
+            list(map(filter_fn, obj)) if isinstance(obj, (list, tuple))
+            else obj if not isinstance(obj, dict)
+            else dict((k, filter_fn(v)) for k, v in obj.items() if keep_key(k)))
+        return filter_fn(info_dict)
+
+    def run_pp(self, pp, infodict):
         files_to_delete = []
+        if '__files_to_move' not in infodict:
+            infodict['__files_to_move'] = {}
         files_to_delete, infodict = pp.run(infodict)
         if not files_to_delete:
-            return files_to_move, infodict
+            return infodict
 
         if self.params.get('keepvideo', False):
             for f in files_to_delete:
-                files_to_move.setdefault(f, '')
+                infodict['__files_to_move'].setdefault(f, '')
         else:
             for old_filename in set(files_to_delete):
                 self.to_screen('Deleting original file %s (pass -k to keep)' % old_filename)
@@ -2541,27 +2794,49 @@ def run_pp(self, pp, infodict, files_to_move={}):
                     os.remove(encodeFilename(old_filename))
                 except (IOError, OSError):
                     self.report_warning('Unable to remove downloaded original file')
-                if old_filename in files_to_move:
-                    del files_to_move[old_filename]
-        return files_to_move, infodict
+                if old_filename in infodict['__files_to_move']:
+                    del infodict['__files_to_move'][old_filename]
+        return infodict
+
+    @staticmethod
+    def post_extract(info_dict):
+        def actual_post_extract(info_dict):
+            if info_dict.get('_type') in ('playlist', 'multi_video'):
+                for video_dict in info_dict.get('entries', {}):
+                    actual_post_extract(video_dict or {})
+                return
+
+            post_extractor = info_dict.get('__post_extractor') or (lambda: {})
+            extra = post_extractor().items()
+            info_dict.update(extra)
+            info_dict.pop('__post_extractor', None)
+
+            original_infodict = info_dict.get('__original_infodict') or {}
+            original_infodict.update(extra)
+            original_infodict.pop('__post_extractor', None)
+
+        actual_post_extract(info_dict or {})
 
-    def pre_process(self, ie_info):
+    def pre_process(self, ie_info, key='pre_process', files_to_move=None):
         info = dict(ie_info)
-        for pp in self._pps['beforedl']:
-            info = self.run_pp(pp, info)[1]
-        return info
+        info['__files_to_move'] = files_to_move or {}
+        for pp in self._pps[key]:
+            info = self.run_pp(pp, info)
+        return info, info.pop('__files_to_move', None)
 
-    def post_process(self, filename, ie_info, files_to_move={}):
+    def post_process(self, filename, ie_info, files_to_move=None):
         """Run all the postprocessors on the given file."""
         info = dict(ie_info)
         info['filepath'] = filename
-        info['__files_to_move'] = {}
-
-        for pp in ie_info.get('__postprocessors', []) + self._pps['normal']:
-            files_to_move, info = self.run_pp(pp, info, files_to_move)
-        info = self.run_pp(MoveFilesAfterDownloadPP(self, files_to_move), info)[1]
-        for pp in self._pps['aftermove']:
-            info = self.run_pp(pp, info, {})[1]
+        info['__files_to_move'] = files_to_move or {}
+
+        for pp in ie_info.get('__postprocessors', []) + self._pps['post_process']:
+            info = self.run_pp(pp, info)
+        info = self.run_pp(MoveFilesAfterDownloadPP(self), info)
+        del info['__files_to_move']
+        for pp in self._pps['after_move']:
+            info = self.run_pp(pp, info)
+        return info
 
     def _make_archive_id(self, info_dict):
         video_id = info_dict.get('id')
@@ -2610,12 +2885,11 @@ def format_resolution(format, default='unknown'):
             return 'audio only'
         if format.get('resolution') is not None:
             return format['resolution']
-        if format.get('height') is not None:
-            if format.get('width') is not None:
-                res = '%sx%s' % (format['width'], format['height'])
-            else:
-                res = '%sp' % format['height']
-        elif format.get('width') is not None:
+        if format.get('width') and format.get('height'):
+            res = '%dx%d' % (format['width'], format['height'])
+        elif format.get('height'):
+            res = '%sp' % format['height']
+        elif format.get('width'):
             res = '%dx?' % format['width']
         else:
             res = default
@@ -2690,7 +2964,9 @@ def join_fields(*vargs):
 
     def list_formats(self, info_dict):
         formats = info_dict.get('formats', [info_dict])
-        new_format = self.params.get('listformats_table', False)
+        new_format = (
+            'list-formats' not in self.params.get('compat_opts', [])
+            and self.params.get('list_formats_as_table', True) is not False)
         if new_format:
             table = [
                 [
@@ -2701,7 +2977,7 @@ def list_formats(self, info_dict):
                     '|',
                     format_field(f, 'filesize', ' %s', func=format_bytes) + format_field(f, 'filesize_approx', '~%s', func=format_bytes),
                     format_field(f, 'tbr', '%4dk'),
-                    f.get('protocol').replace('http_dash_segments', 'dash').replace("native", "n").replace('niconico_', ''),
+                    shorten_protocol_name(f.get('protocol', '').replace("native", "n")),
                     '|',
                     format_field(f, 'vcodec', default='unknown').replace('none', ''),
                     format_field(f, 'vbr', '%4dk'),
@@ -2750,10 +3026,17 @@ def list_subtitles(self, video_id, subtitles, name='subtitles'):
             return
         self.to_screen(
             'Available %s for %s:' % (name, video_id))
+
+        def _row(lang, formats):
+            exts, names = zip(*((f['ext'], f.get('name', 'unknown')) for f in reversed(formats)))
+            if len(set(names)) == 1:
+                names = [] if names[0] == 'unknown' else names[:1]
+            return [lang, ', '.join(names), ', '.join(exts)]
+
         self.to_screen(render_table(
-            ['Language', 'formats'],
-            [[lang, ', '.join(f['ext'] for f in reversed(formats))]
-                for lang, formats in subtitles.items()]))
+            ['Language', 'Name', 'Formats'],
+            [_row(lang, formats) for lang, formats in subtitles.items()],
+            hideEmpty=True))
 
     def urlopen(self, req):
         """ Start an HTTP download """
@@ -2791,6 +3074,9 @@ def print_debug_header(self):
         if _PLUGIN_CLASSES:
             self._write_string(
                 '[debug] Plugin Extractors: %s\n' % [ie.ie_key() for ie in _PLUGIN_CLASSES])
+        if self.params.get('compat_opts'):
+            self._write_string(
+                '[debug] Compatibility options: %s\n' % ', '.join(self.params.get('compat_opts')))
         try:
             sp = subprocess.Popen(
                 ['git', 'rev-parse', '--short', 'HEAD'],
@@ -2929,14 +3215,14 @@ def _write_thumbnails(self, info_dict, filename):  # return the extensions
             thumb_ext = determine_ext(t['url'], 'jpg')
             suffix = '%s.' % t['id'] if multiple else ''
             thumb_display_id = '%s ' % t['id'] if multiple else ''
-            t['filename'] = thumb_filename = replace_extension(filename, suffix + thumb_ext, info_dict.get('ext'))
+            t['filepath'] = thumb_filename = replace_extension(filename, suffix + thumb_ext, info_dict.get('ext'))
 
             if not self.params.get('overwrites', True) and os.path.exists(encodeFilename(thumb_filename)):
                 ret.append(suffix + thumb_ext)
                 self.to_screen('[%s] %s: Thumbnail %sis already present' %
                                (info_dict['extractor'], info_dict['id'], thumb_display_id))
             else:
-                self.to_screen('[%s] %s: Downloading thumbnail %s...' %
+                self.to_screen('[%s] %s: Downloading thumbnail %s ...' %
                                (info_dict['extractor'], info_dict['id'], thumb_display_id))
                 try:
                     uf = self.urlopen(t['url'])
@@ -2945,7 +3231,7 @@ def _write_thumbnails(self, info_dict, filename):  # return the extensions
                     ret.append(suffix + thumb_ext)
                     self.to_screen('[%s] %s: Writing thumbnail %sto: %s' %
                                    (info_dict['extractor'], info_dict['id'], thumb_display_id, thumb_filename))
-                except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
+                except network_exceptions as err:
                     self.report_warning('Unable to download thumbnail "%s": %s' %
                                         (t['url'], error_to_compat_str(err)))
             if ret and not write_all: