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ffmpeg: check timebase validity before using it.

Found-by: Daemon404
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-10-15 20:35:01 +02:00
parent af32a1f2d1
commit 547ec4d303

View File

@ -561,7 +561,7 @@ static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
if (!ist->framerate.num) {
AVRational codec_fr = av_inv_q(ist->st->codec->time_base);
codec_fr.den *= ist->st->codec->ticks_per_frame;
if(av_q2d(codec_fr) < av_q2d(fr)*0.7)
if(codec_fr.num>0 && codec_fr.den>0 && av_q2d(codec_fr) < av_q2d(fr)*0.7)
fr = codec_fr;
}