Re: [FFmpeg-trac] #5548(avcodec:open): FFV1 encoder creates invalid stream with -level 3 if width or height is between 1 and 3 (was: FFV1 encoder creates invalid stream with -level 3 if width or height is 1 or 2)

#5548: FFV1 encoder creates invalid stream with -level 3 if width or height is between 1 and 3 ------------------------------------+----------------------------------- Reporter: Zenitram | Owner: Type: defect | Status: open Priority: normal | Component: avcodec Version: git-master | Resolution: Keywords: FFV1 | Blocked By: Blocking: | Reproduced by developer: 1 Analyzed by developer: 0 | ------------------------------------+----------------------------------- Comment (by Zenitram): I slightly change the report: - with width or height of 1, there is no valid slice so there is an error from FFmpeg during decode - with width or height of 2 or 3, the last slice (horizontal or vertical) is invalid so discarded and the first slice is the only one decoded. with: - ffmpeg -y -f lavfi -i "color=c=white" -t 10 -filter:v scale="3:3" -vcodec ffv1 -level 3 3x3.mkv then playback in e.g. VLC it is yellow on the top left and black right and bottom. - ffmpeg -y -f lavfi -i "color=c=white" -t 10 -filter:v scale="4:4" -vcodec ffv1 -level 3 4x4.mkv then playback in e.g. VLC it is white everywhere. -- Ticket URL: <https://trac.ffmpeg.org/ticket/5548#comment:2> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker