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avcodec/mpeg12dec: Fixes runtime error: division by zero
Fixes: 1464/clusterfuzz-testcase-minimized-4925445571084288 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> (cherry picked from commit c0ece1f4addf8ac31df95775a2d36be2a55fc759) Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -1291,7 +1291,8 @@ static int mpeg_decode_postinit(AVCodecContext *avctx)
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if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
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// MPEG-1 aspect
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avctx->sample_aspect_ratio = av_d2q(1.0 / ff_mpeg1_aspect[s->aspect_ratio_info], 255);
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AVRational aspect_inv = av_d2q(ff_mpeg1_aspect[s->aspect_ratio_info], 255);
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avctx->sample_aspect_ratio = (AVRational) { aspect_inv.den, aspect_inv.num };
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} else { // MPEG-2
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// MPEG-2 aspect
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if (s->aspect_ratio_info > 1) {
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