From: John-Paul Stewart <jpstewart-at-personalprojects.net@ffmpeg.org>
To: ffmpeg-devel@ffmpeg.org
Subject: [FFmpeg-devel] [PATCH v2 0/2] avformat/mvdec: make audio stream conditional
Date: Fri, 31 Dec 2021 20:11:46 -0500
Message-ID: <20220101011148.13921-1-jpstewart@personalprojects.net> (raw)
Changed in v2:
Allocate the audio stream first to maintain consistent behaviour
with prior code.
Recent discussion on the list led me to realize that libavformat was
unconditionally creating an audio stream for all SGI movie format
(version 2) files, even when no audio is present in the file.
A sample of a movie file with no audio can be found at
http://www.personalprojects.net/ffmpeg/silent.movie
Unpatched ffmpeg will report an audio stream even though no audio is
present. After the following patch no audio stream is reported.
Incidentally, the silent.movie sample above is at 25fps and can also be
used by anyone who wants to double-check the earlier patch 3c9ffbd009
that reads and sets the framerate. The sample file is only about 88 KB.
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next reply other threads:[~2022-01-01 1:12 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-01 1:11 John-Paul Stewart [this message]
2022-01-01 1:11 ` [FFmpeg-devel] [PATCH v2 1/2] " John-Paul Stewart
2022-01-01 1:11 ` [FFmpeg-devel] [PATCH v2 2/2] avformat/mvdec: re-indent after last commit John-Paul Stewart
2022-01-05 6:18 ` [FFmpeg-devel] [PATCH v2 0/2] avformat/mvdec: make audio stream conditional Peter Ross
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