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ffmpeg: Check that r_frame_rate is set before attempting to use it 

Avoids unexpected occurance and dependency on NaN behavior and divisions by 0

Testcase: fate-lavf-fate-avi_cram

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2016-05-16 12:49:06 +02:00
parent feeb3a9261
commit 6085d6b2ae
1 changed files with 2 additions and 1 deletions
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ffmpeg.c
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@ -2917,7 +2917,8 @@ static int transcode_init(void)
* overhead
*/
if(!strcmp(oc->oformat->name, "avi")) {
if ( copy_tb<0 && av_q2d(ist->st->r_frame_rate) >= av_q2d(ist->st->avg_frame_rate)
if ( copy_tb<0 && ist->st->r_frame_rate.num
&& av_q2d(ist->st->r_frame_rate) >= av_q2d(ist->st->avg_frame_rate)
&& 0.5/av_q2d(ist->st->r_frame_rate) > av_q2d(ist->st->time_base)
&& 0.5/av_q2d(ist->st->r_frame_rate) > av_q2d(dec_ctx->time_base)
&& av_q2d(ist->st->time_base) < 1.0/500 && av_q2d(dec_ctx->time_base) < 1.0/500