Jeff Downs <[email protected]> added the comment:

Removing these patches, they are not right. While they do prevent the crash, I
believe they can produce incorrect output.

The problem description/analysis is still accurate. however.  When s->linesize
is not the same as local var linesize (this happens at least for mpeg2 16x8 type
mv), the problem is triggered.

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FFmpeg issue tracker <[email protected]>
<https://roundup.ffmpeg.org/roundup/ffmpeg/issue1221>
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