#11423: Remuxing webm to opus adds silence to opus stream
-------------------------------------+-------------------------------------
Reporter: y1dj1sqd | Type: defect
Status: new | Priority: normal
Component: | Version: git-
undetermined | master
Keywords: webm opus | Blocked By:
remux |
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Summary of the bug:
When extracting the opus stream from a .webm file to a .opus file it does
change the duration of the opus stream.
The extracted stream starts delayed and it adds some additional silence to
the end.
How to reproduce:
{{{
% yt-dlp -f 251 "https://www.youtube.com/watch?v=dQw4w9WgXcQ";
% ffmpeg -i "Rick Astley - Never Gonna Give You Up (Official Music Video)
[dQw4w9WgXcQ].webm" -c copy out.opus
}}}
For comparison doing the same with mkvextract does output a stream which
is perfectly in sync and the exact same duration as the input:
{{{
% mkvextract "Rick Astley - Never Gonna Give You Up (Official Music Video)
[dQw4w9WgXcQ].webm" tracks 0:out2.opus
}}}
ffmpeg versions tested (both affected)
{{{
ffmpeg version n7.1 Copyright (c) 2000-2024 the FFmpeg developers
}}}
{{{
ffmpeg version N-118315-g4f3c9f2f03-20250116 Copyright (c) 2000-2025 the
FFmpeg developers
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/11423>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
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