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avformat/timecode: use 64bit for intermediate for rounding in fps_from_frame_rate()

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Fixes: 62276/clusterfuzz-testcase-minimized-ffmpeg_dem_MOV_fuzzer-4802790784303104
Fixes: signed integer overflow: 1768972133 + 968491058 cannot be represented in type 'int'

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 3d8d778a68531b406455f8090d81216ef374ab75)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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Michael Niedermayer 2024-03-26 00:27:39 +01:00
parent a3fccb9729
commit 21435d08ba
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1 changed files with 1 additions and 1 deletions
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libavutil/timecode.c
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@ -210,7 +210,7 @@ static int fps_from_frame_rate(AVRational rate)
{
if (!rate.den || !rate.num)
return -1;
return (rate.num + rate.den/2) / rate.den;
return (rate.num + rate.den/2LL) / rate.den;
}
int av_timecode_check_frame_rate(AVRational rate)