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avformat/movenc: Free old vos_data before overwriting it

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Otherwise the old data leaks whenever extradata needs to be rewritten
(e.g. when encoding FLAC with our encoder that sends an updated
extradata packet at the end).

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
(cherry picked from commit 432f291dffb0079bf447b1cdb8802a022298510f)
This commit is contained in:
Andreas Rheinhardt 2020-09-28 18:05:44 +02:00
parent dc4e3b9586
commit 3fc8dc3589
1 changed files with 1 additions and 0 deletions
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libavformat/movenc.c
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@ -6880,6 +6880,7 @@ static int mov_write_trailer(AVFormatContext *s)
AVCodecParameters *par = track->par;
track->vos_len = par->extradata_size;
av_freep(&track->vos_data);
track->vos_data = av_malloc(track->vos_len + AV_INPUT_BUFFER_PADDING_SIZE);
if (!track->vos_data)
return AVERROR(ENOMEM);