ffmpeg: check timebase validity before using it.

Found-by: Daemon404 Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
12 years ago · 547ec4d303
parent af32a1f2d1
commit 547ec4d303
1 changed files with 1 additions and 1 deletions
--- a/ffmpeg_filter.c
+++ b/ffmpeg_filter.c
@ -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;
    }