[FFmpeg-trac] #769(swscale:open): png gray8 alpha decodes incorrectly
FFmpeg
trac at avcodec.org
Fri Dec 16 22:24:33 CET 2011
#769: png gray8 alpha decodes incorrectly
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Reporter: ami_stuff | Owner:
Type: defect | Status: open
Priority: normal | Component: swscale
Version: git-master | Resolution:
Keywords: gray8a alpha | Blocked By:
Blocking: | Reproduced by developer: 1
Analyzed by developer: 0 |
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Comment (by ami_stuff):
I attache output from irfanview which I consider correct.
Now please create these files:
ffmpeg -loop 1 -t 5 -i basi4a08.png -vcodec rawvideo -pix_fmt rgba
rgba.avi
ffmpeg -loop 1 -t 5 -i basi4a08.png -vcodec rawvideo -pix_fmt yuv420p
yuv420p.avi
and play rgba.avi and yuv420p.avi with vlc.
rgba.avi will look more or less ok (there are still some strange black
dots - something like flipped "F", but let's ignore it for now).
yuv420p.avi will have vertical black lines, which is not correct.
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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/769#comment:7>
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