[FFmpeg-devel] [PATCH] avfilter/vsrc_testsrc: fix colorchart black stripe

[Vladimir Petrov]

There is a typo at 'libavfilter/vsrc_testsrc.c' in
'colorchart_fill_picture()' regarding patch height when using
colorchart test image source. With current default size 64x64 all is
fine, but when move to any non-square patch size, there is unexpected
behavior:

Test examples:

[Blackstripe on bottom if height > width]
ffmpeg -f lavfi -i colorchart=duration=30:rate=25:patch_size=120x144
-f mp4 -c:v libx264 colorchart1.m4v

[Segmentation fault if height < width]
ffmpeg -f lavfi -i colorchart=duration=30:rate=25:patch_size=120x100
-f mp4 -c:v libx264 colorchart2.m4v
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