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avformat/matroskadec: Fix float-cast-overflow undefined behavior in matroska_parse_tracks()

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Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit e07649e618)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Nikolas Bowe 2018-01-18 15:21:56 -08:00 committed by Michael Niedermayer
parent e858326086
commit 9d0b3fa58c
1 changed files with 10 additions and 2 deletions
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12
libavformat/matroskadec.c
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@ -1782,8 +1782,16 @@ static int matroska_parse_tracks(AVFormatContext *s)
}
if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
if (!track->default_duration && track->video.frame_rate > 0)
track->default_duration = 1000000000 / track->video.frame_rate;
if (!track->default_duration && track->video.frame_rate > 0) {
double default_duration = 1000000000 / track->video.frame_rate;
if (default_duration > UINT64_MAX || default_duration < 0) {
av_log(matroska->ctx, AV_LOG_WARNING,
"Invalid frame rate %e. Cannot calculate default duration.\n",
track->video.frame_rate);
} else {
track->default_duration = default_duration;
}
}
if (track->video.display_width == -1)
track->video.display_width = track->video.pixel_width;
if (track->video.display_height == -1)