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Commit | Line | Data |
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e154c651 | 1 | import binascii |
f8271158 | 2 | import io |
3 | import re | |
3bc2ddcc | 4 | |
c487cf00 | 5 | from . import get_suitable_downloader |
0d66bd0e | 6 | from .external import FFmpegFD |
f8271158 | 7 | from .fragment import FragmentFD |
4a2f19ab | 8 | from .. import webvtt |
9b8ee23b | 9 | from ..compat import compat_urlparse |
10 | from ..dependencies import Cryptodome_AES | |
f8271158 | 11 | from ..utils import bug_reports_message, parse_m3u8_attributes, update_url_query |
3bc2ddcc JMF |
12 | |
13 | ||
12b84ac8 | 14 | class HlsFD(FragmentFD): |
0a473f2f | 15 | """ |
16 | Download segments in a m3u8 manifest. External downloaders can take over | |
52a8a1e1 | 17 | the fragment downloads by supporting the 'm3u8_frag_urls' protocol and |
0a473f2f | 18 | re-defining 'supports_manifest' function |
19 | """ | |
f0b5d6af | 20 | |
f9a5affa S |
21 | FD_NAME = 'hlsnative' |
22 | ||
0d66bd0e | 23 | @staticmethod |
edf65256 | 24 | def can_download(manifest, info_dict, allow_unplayable_formats=False): |
63ad4d43 | 25 | UNSUPPORTED_FEATURES = [ |
f5974637 | 26 | # r'#EXT-X-BYTERANGE', # playlists composed of byte ranges of media files [2] |
1e236d7e | 27 | |
c15c47d1 S |
28 | # Live streams heuristic does not always work (e.g. geo restricted to Germany |
29 | # http://hls-geo.daserste.de/i/videoportal/Film/c_620000/622873/format,716451,716457,716450,716458,716459,.mp4.csmil/index_4_av.m3u8?null=0) | |
2937590e | 30 | # r'#EXT-X-MEDIA-SEQUENCE:(?!0$)', # live streams [3] |
1e236d7e S |
31 | |
32 | # This heuristic also is not correct since segments may not be appended as well. | |
633b444f S |
33 | # Twitch vods of finished streams have EXT-X-PLAYLIST-TYPE:EVENT despite |
34 | # no segments will definitely be appended to the end of the playlist. | |
1e236d7e | 35 | # r'#EXT-X-PLAYLIST-TYPE:EVENT', # media segments may be appended to the end of |
51c4d85c | 36 | # # event media playlists [4] |
b1bb77d7 | 37 | # r'#EXT-X-MAP:', # media initialization [5] |
0d66bd0e S |
38 | # 1. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.2.4 |
39 | # 2. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.2.2 | |
40 | # 3. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.3.2 | |
6104cc29 | 41 | # 4. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.3.5 |
29f7c58a | 42 | # 5. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.2.5 |
63ad4d43 | 43 | ] |
44 | if not allow_unplayable_formats: | |
45 | UNSUPPORTED_FEATURES += [ | |
46 | r'#EXT-X-KEY:METHOD=(?!NONE|AES-128)', # encrypted streams [1] | |
47 | ] | |
0a473f2f | 48 | |
49 | def check_results(): | |
50 | yield not info_dict.get('is_live') | |
0a473f2f | 51 | for feature in UNSUPPORTED_FEATURES: |
52 | yield not re.search(feature, manifest) | |
53 | return all(check_results()) | |
0d66bd0e | 54 | |
f0b5d6af | 55 | def real_download(self, filename, info_dict): |
f9a5affa S |
56 | man_url = info_dict['url'] |
57 | self.to_screen('[%s] Downloading m3u8 manifest' % self.FD_NAME) | |
69035555 | 58 | |
c5a49ff0 S |
59 | urlh = self.ydl.urlopen(self._prepare_url(info_dict, man_url)) |
60 | man_url = urlh.geturl() | |
61 | s = urlh.read().decode('utf-8', 'ignore') | |
0d66bd0e | 62 | |
7687c8ac | 63 | can_download, message = self.can_download(s, info_dict, self.params.get('allow_unplayable_formats')), None |
9b8ee23b | 64 | if can_download and not Cryptodome_AES and '#EXT-X-KEY:METHOD=AES-128' in s: |
7687c8ac | 65 | if FFmpegFD.available(): |
49e7e9c3 | 66 | can_download, message = False, 'The stream has AES-128 encryption and pycryptodomex is not available' |
7687c8ac | 67 | else: |
49e7e9c3 | 68 | message = ('The stream has AES-128 encryption and neither ffmpeg nor pycryptodomex are available; ' |
7687c8ac | 69 | 'Decryption will be performed natively, but will be extremely slow') |
70 | if not can_download: | |
6b993ca7 | 71 | has_drm = re.search('|'.join([ |
72 | r'#EXT-X-FAXS-CM:', # Adobe Flash Access | |
73 | r'#EXT-X-(?:SESSION-)?KEY:.*?URI="skd://', # Apple FairPlay | |
74 | ]), s) | |
75 | if has_drm and not self.params.get('allow_unplayable_formats'): | |
76 | self.report_error( | |
77 | 'This video is DRM protected; Try selecting another format with --format or ' | |
78 | 'add --check-formats to automatically fallback to the next best format') | |
79 | return False | |
7687c8ac | 80 | message = message or 'Unsupported features have been detected' |
2bfaf89b | 81 | fd = FFmpegFD(self.ydl, self.params) |
7687c8ac | 82 | self.report_warning(f'{message}; extraction will be delegated to {fd.get_basename()}') |
2bfaf89b | 83 | return fd.real_download(filename, info_dict) |
7687c8ac | 84 | elif message: |
85 | self.report_warning(message) | |
0d66bd0e | 86 | |
5dcd8e1d | 87 | is_webvtt = info_dict['ext'] == 'vtt' |
88 | if is_webvtt: | |
89 | real_downloader = None # Packing the fragments is not currently supported for external downloader | |
90 | else: | |
96fccc10 | 91 | real_downloader = get_suitable_downloader( |
a46a815b | 92 | info_dict, self.params, None, protocol='m3u8_frag_urls', to_stdout=(filename == '-')) |
0a473f2f | 93 | if real_downloader and not real_downloader.supports_manifest(s): |
94 | real_downloader = None | |
beb4b92a | 95 | if real_downloader: |
86e5f3ed | 96 | self.to_screen(f'[{self.FD_NAME}] Fragment downloads will be delegated to {real_downloader.get_basename()}') |
0a473f2f | 97 | |
f1ab3b7d | 98 | def is_ad_fragment_start(s): |
3089bc74 S |
99 | return (s.startswith('#ANVATO-SEGMENT-INFO') and 'type=ad' in s |
100 | or s.startswith('#UPLYNK-SEGMENT') and s.endswith(',ad')) | |
74c42d9e | 101 | |
f1ab3b7d | 102 | def is_ad_fragment_end(s): |
3089bc74 S |
103 | return (s.startswith('#ANVATO-SEGMENT-INFO') and 'type=master' in s |
104 | or s.startswith('#UPLYNK-SEGMENT') and s.endswith(',segment')) | |
f1ab3b7d | 105 | |
d7009caa | 106 | fragments = [] |
5219cb3e | 107 | |
74c42d9e S |
108 | media_frags = 0 |
109 | ad_frags = 0 | |
110 | ad_frag_next = False | |
f0b5d6af PH |
111 | for line in s.splitlines(): |
112 | line = line.strip() | |
74c42d9e S |
113 | if not line: |
114 | continue | |
115 | if line.startswith('#'): | |
f1ab3b7d | 116 | if is_ad_fragment_start(line): |
a9ee4f6e | 117 | ad_frag_next = True |
f1ab3b7d RA |
118 | elif is_ad_fragment_end(line): |
119 | ad_frag_next = False | |
74c42d9e S |
120 | continue |
121 | if ad_frag_next: | |
f1ab3b7d | 122 | ad_frags += 1 |
74c42d9e S |
123 | continue |
124 | media_frags += 1 | |
f0b5d6af | 125 | |
f9a5affa | 126 | ctx = { |
f0b5d6af | 127 | 'filename': filename, |
74c42d9e S |
128 | 'total_frags': media_frags, |
129 | 'ad_frags': ad_frags, | |
f9a5affa S |
130 | } |
131 | ||
5219cb3e | 132 | if real_downloader: |
133 | self._prepare_external_frag_download(ctx) | |
134 | else: | |
3ba7740d | 135 | self._prepare_and_start_frag_download(ctx, info_dict) |
f9a5affa | 136 | |
4a2f19ab F |
137 | extra_state = ctx.setdefault('extra_state', {}) |
138 | ||
310c2ed2 | 139 | format_index = info_dict.get('format_index') |
b8079a40 | 140 | extra_query = None |
aaf44a2f | 141 | extra_param_to_segment_url = info_dict.get('extra_param_to_segment_url') |
b8079a40 RA |
142 | if extra_param_to_segment_url: |
143 | extra_query = compat_urlparse.parse_qs(extra_param_to_segment_url) | |
e154c651 | 144 | i = 0 |
145 | media_sequence = 0 | |
146 | decrypt_info = {'METHOD': 'NONE'} | |
f5974637 | 147 | byte_range = {} |
310c2ed2 | 148 | discontinuity_count = 0 |
75a24854 | 149 | frag_index = 0 |
74c42d9e | 150 | ad_frag_next = False |
e154c651 | 151 | for line in s.splitlines(): |
152 | line = line.strip() | |
153 | if line: | |
154 | if not line.startswith('#'): | |
310c2ed2 | 155 | if format_index and discontinuity_count != format_index: |
156 | continue | |
74c42d9e | 157 | if ad_frag_next: |
74c42d9e | 158 | continue |
75a24854 | 159 | frag_index += 1 |
3e0304fe | 160 | if frag_index <= ctx['fragment_index']: |
75a24854 | 161 | continue |
e154c651 | 162 | frag_url = ( |
163 | line | |
164 | if re.match(r'^https?://', line) | |
165 | else compat_urlparse.urljoin(man_url, line)) | |
b8079a40 RA |
166 | if extra_query: |
167 | frag_url = update_url_query(frag_url, extra_query) | |
5219cb3e | 168 | |
4cf1e5d2 | 169 | fragments.append({ |
170 | 'frag_index': frag_index, | |
171 | 'url': frag_url, | |
172 | 'decrypt_info': decrypt_info, | |
173 | 'byte_range': byte_range, | |
174 | 'media_sequence': media_sequence, | |
175 | }) | |
d9d8b857 | 176 | media_sequence += 1 |
5219cb3e | 177 | |
b1bb77d7 | 178 | elif line.startswith('#EXT-X-MAP'): |
310c2ed2 | 179 | if format_index and discontinuity_count != format_index: |
180 | continue | |
b1bb77d7 | 181 | if frag_index > 0: |
182 | self.report_error( | |
beb4b92a | 183 | 'Initialization fragment found after media fragments, unable to download') |
b1bb77d7 | 184 | return False |
185 | frag_index += 1 | |
186 | map_info = parse_m3u8_attributes(line[11:]) | |
187 | frag_url = ( | |
188 | map_info.get('URI') | |
189 | if re.match(r'^https?://', map_info.get('URI')) | |
190 | else compat_urlparse.urljoin(man_url, map_info.get('URI'))) | |
191 | if extra_query: | |
192 | frag_url = update_url_query(frag_url, extra_query) | |
4cf1e5d2 | 193 | |
e4fa34a1 | 194 | if map_info.get('BYTERANGE'): |
195 | splitted_byte_range = map_info.get('BYTERANGE').split('@') | |
196 | sub_range_start = int(splitted_byte_range[1]) if len(splitted_byte_range) == 2 else byte_range['end'] | |
197 | byte_range = { | |
198 | 'start': sub_range_start, | |
199 | 'end': sub_range_start + int(splitted_byte_range[0]), | |
200 | } | |
201 | ||
4cf1e5d2 | 202 | fragments.append({ |
203 | 'frag_index': frag_index, | |
204 | 'url': frag_url, | |
205 | 'decrypt_info': decrypt_info, | |
206 | 'byte_range': byte_range, | |
207 | 'media_sequence': media_sequence | |
208 | }) | |
d9d8b857 | 209 | media_sequence += 1 |
b1bb77d7 | 210 | |
b1bb77d7 | 211 | elif line.startswith('#EXT-X-KEY'): |
212 | decrypt_url = decrypt_info.get('URI') | |
213 | decrypt_info = parse_m3u8_attributes(line[11:]) | |
214 | if decrypt_info['METHOD'] == 'AES-128': | |
215 | if 'IV' in decrypt_info: | |
216 | decrypt_info['IV'] = binascii.unhexlify(decrypt_info['IV'][2:].zfill(32)) | |
217 | if not re.match(r'^https?://', decrypt_info['URI']): | |
218 | decrypt_info['URI'] = compat_urlparse.urljoin( | |
219 | man_url, decrypt_info['URI']) | |
220 | if extra_query: | |
221 | decrypt_info['URI'] = update_url_query(decrypt_info['URI'], extra_query) | |
222 | if decrypt_url != decrypt_info['URI']: | |
223 | decrypt_info['KEY'] = None | |
b1bb77d7 | 224 | |
225 | elif line.startswith('#EXT-X-MEDIA-SEQUENCE'): | |
226 | media_sequence = int(line[22:]) | |
227 | elif line.startswith('#EXT-X-BYTERANGE'): | |
228 | splitted_byte_range = line[17:].split('@') | |
229 | sub_range_start = int(splitted_byte_range[1]) if len(splitted_byte_range) == 2 else byte_range['end'] | |
230 | byte_range = { | |
231 | 'start': sub_range_start, | |
232 | 'end': sub_range_start + int(splitted_byte_range[0]), | |
233 | } | |
234 | elif is_ad_fragment_start(line): | |
235 | ad_frag_next = True | |
236 | elif is_ad_fragment_end(line): | |
237 | ad_frag_next = False | |
310c2ed2 | 238 | elif line.startswith('#EXT-X-DISCONTINUITY'): |
239 | discontinuity_count += 1 | |
4cf1e5d2 | 240 | i += 1 |
b1bb77d7 | 241 | |
4cf1e5d2 | 242 | # We only download the first fragment during the test |
4c7853de | 243 | if self.params.get('test', False): |
4cf1e5d2 | 244 | fragments = [fragments[0] if fragments else None] |
f9a5affa | 245 | |
5219cb3e | 246 | if real_downloader: |
03b4de72 | 247 | info_dict['fragments'] = fragments |
5219cb3e | 248 | fd = real_downloader(self.ydl, self.params) |
249 | # TODO: Make progress updates work without hooking twice | |
250 | # for ph in self._progress_hooks: | |
251 | # fd.add_progress_hook(ph) | |
03b4de72 | 252 | return fd.real_download(filename, info_dict) |
333217f4 | 253 | |
bd4d1ea3 | 254 | if is_webvtt: |
255 | def pack_fragment(frag_content, frag_index): | |
256 | output = io.StringIO() | |
257 | adjust = 0 | |
7a6742b5 F |
258 | overflow = False |
259 | mpegts_last = None | |
bd4d1ea3 | 260 | for block in webvtt.parse_fragment(frag_content): |
261 | if isinstance(block, webvtt.CueBlock): | |
7a6742b5 F |
262 | extra_state['webvtt_mpegts_last'] = mpegts_last |
263 | if overflow: | |
264 | extra_state['webvtt_mpegts_adjust'] += 1 | |
265 | overflow = False | |
bd4d1ea3 | 266 | block.start += adjust |
267 | block.end += adjust | |
268 | ||
269 | dedup_window = extra_state.setdefault('webvtt_dedup_window', []) | |
bd4d1ea3 | 270 | |
25a3f4f5 F |
271 | ready = [] |
272 | ||
bd4d1ea3 | 273 | i = 0 |
25a3f4f5 | 274 | is_new = True |
bd4d1ea3 | 275 | while i < len(dedup_window): |
25a3f4f5 F |
276 | wcue = dedup_window[i] |
277 | wblock = webvtt.CueBlock.from_json(wcue) | |
278 | i += 1 | |
279 | if wblock.hinges(block): | |
280 | wcue['end'] = block.end | |
281 | is_new = False | |
282 | continue | |
283 | if wblock == block: | |
284 | is_new = False | |
285 | continue | |
286 | if wblock.end > block.start: | |
4a2f19ab | 287 | continue |
25a3f4f5 F |
288 | ready.append(wblock) |
289 | i -= 1 | |
bd4d1ea3 | 290 | del dedup_window[i] |
bd4d1ea3 | 291 | |
25a3f4f5 F |
292 | if is_new: |
293 | dedup_window.append(block.as_json) | |
294 | for block in ready: | |
295 | block.write_into(output) | |
bd4d1ea3 | 296 | |
25a3f4f5 F |
297 | # we only emit cues once they fall out of the duplicate window |
298 | continue | |
bd4d1ea3 | 299 | elif isinstance(block, webvtt.Magic): |
300 | # take care of MPEG PES timestamp overflow | |
301 | if block.mpegts is None: | |
302 | block.mpegts = 0 | |
303 | extra_state.setdefault('webvtt_mpegts_adjust', 0) | |
304 | block.mpegts += extra_state['webvtt_mpegts_adjust'] << 33 | |
305 | if block.mpegts < extra_state.get('webvtt_mpegts_last', 0): | |
7a6742b5 | 306 | overflow = True |
bd4d1ea3 | 307 | block.mpegts += 1 << 33 |
7a6742b5 | 308 | mpegts_last = block.mpegts |
bd4d1ea3 | 309 | |
310 | if frag_index == 1: | |
311 | extra_state['webvtt_mpegts'] = block.mpegts or 0 | |
312 | extra_state['webvtt_local'] = block.local or 0 | |
313 | # XXX: block.local = block.mpegts = None ? | |
314 | else: | |
315 | if block.mpegts is not None and block.local is not None: | |
316 | adjust = ( | |
317 | (block.mpegts - extra_state.get('webvtt_mpegts', 0)) | |
318 | - (block.local - extra_state.get('webvtt_local', 0)) | |
319 | ) | |
320 | continue | |
321 | elif isinstance(block, webvtt.HeaderBlock): | |
322 | if frag_index != 1: | |
323 | # XXX: this should probably be silent as well | |
324 | # or verify that all segments contain the same data | |
325 | self.report_warning(bug_reports_message( | |
326 | 'Discarding a %s block found in the middle of the stream; ' | |
327 | 'if the subtitles display incorrectly,' | |
328 | % (type(block).__name__))) | |
329 | continue | |
330 | block.write_into(output) | |
331 | ||
0f06bcd7 | 332 | return output.getvalue().encode() |
25a3f4f5 F |
333 | |
334 | def fin_fragments(): | |
335 | dedup_window = extra_state.get('webvtt_dedup_window') | |
336 | if not dedup_window: | |
337 | return b'' | |
338 | ||
339 | output = io.StringIO() | |
340 | for cue in dedup_window: | |
341 | webvtt.CueBlock.from_json(cue).write_into(output) | |
342 | ||
0f06bcd7 | 343 | return output.getvalue().encode() |
25a3f4f5 F |
344 | |
345 | self.download_and_append_fragments( | |
346 | ctx, fragments, info_dict, pack_func=pack_fragment, finish_func=fin_fragments) | |
bd4d1ea3 | 347 | else: |
25a3f4f5 | 348 | return self.download_and_append_fragments(ctx, fragments, info_dict) |