This seems to be determined by whether information is copied from the codec context to codecpar for the last time before or after the input file's aspect ratio changes. I'm not sure what the "right" value to return here is, nor why this is different with this patch.
> On Apr 13, 2016, at 06:28, Michael Niedermayer <mich...@niedermayer.cc> wrote: > > On Wed, Apr 13, 2016 at 03:26:03AM -0500, Rodger Combs wrote: >> --- >> libavcodec/mpegvideo_parser.c | 67 >> +++++++++++++++++++++++++++++++++++++++++++ >> 1 file changed, 67 insertions(+) > > is this intended to change aspect of some files ? > like > http://samples.ffmpeg.org/MPEG-VOB/transport/test16.ts > > testcase that shows this clearly: > ./ffmpeg -i test16.ts -vf > 'scale=iw/ih*oh*sar:288,pad=512:288:(ow-iw)/2:(oh-ih)/2:blue' > aspectchangetoconstantres-rcombs.ts > > [...] > -- > Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB > > No snowflake in an avalanche ever feels responsible. -- Voltaire > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
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