From: Lesmiscore <redacted>
Date: Mon, 19 Dec 2022 02:36:14 +0000 (+0900)
Subject: Deprioritize HEVC-over-FLV formats (#5823)
X-Git-Tag: 2023.01.02~60
X-Git-Url: https://jfr.im/git/yt-dlp.git/commitdiff_plain/5424dbaf91728aaf77458e68d993ba6c34e8e222

Deprioritize HEVC-over-FLV formats (#5823)

Authored by: Lesmiscore
---

diff --git a/yt_dlp/utils.py b/yt_dlp/utils.py
index 9697ba1c1..65408bf19 100644
--- a/yt_dlp/utils.py
+++ b/yt_dlp/utils.py
@@ -6307,6 +6307,12 @@ def calculate_preference(self, format):
         # if format.get('preference') is None and format.get('ext') in ('f4f', 'f4m'):  # Not supported?
         #    format['preference'] = -1000
 
+        if format.get('preference') is None and format.get('ext') == 'flv' and re.match('[hx]265|he?vc?', format.get('vcodec') or ''):
+            # HEVC-over-FLV is out-of-spec by FLV's original spec
+            # ref. https://trac.ffmpeg.org/ticket/6389
+            # ref. https://github.com/yt-dlp/yt-dlp/pull/5821
+            format['preference'] = -100
+
         # Determine missing bitrates
         if format.get('tbr') is None:
             if format.get('vbr') is not None and format.get('abr') is not None: