generic-library/ffmpeg
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Merge remote-tracking branch 'qatar/master'

Browse Source 
* qatar/master:
  lavf: Make sure avg_frame_rate can be calculated without integer overflow

Merged-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-07-16 00:39:33 +02:00
commit 4f1d3e0212
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
libavformat/utils.c
View File

@ -2954,6 +2954,9 @@ int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
int best_fps = 0; int best_fps = 0;
double best_error = 0.01; double best_error = 0.01;
if (st->info->codec_info_duration >= INT64_MAX / st->time_base.num / 2||
st->info->codec_info_duration_fields >= INT64_MAX / st->time_base.den)
continue;
av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den, av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
st->info->codec_info_duration_fields*(int64_t)st->time_base.den, st->info->codec_info_duration_fields*(int64_t)st->time_base.den,
st->info->codec_info_duration*2*(int64_t)st->time_base.num, 60000); st->info->codec_info_duration*2*(int64_t)st->time_base.num, 60000);