We've just added a file to libwebp-test-data that covers this case: https://chromium.googlesource.com/webm/libwebp-test-data/+/refs/heads/main/dual_transform.webp FFmpeg currently fails to decode it, but it works with this patch.
My understanding is that an ffmpeg developer needs to upload the file to fate, and then I can add a fate test to the patch? On Fri, Aug 20, 2021 at 7:07 PM James Zern <jzern-at-google....@ffmpeg.org> wrote: > On Thu, Aug 19, 2021 at 12:56 AM Maryla <maryla-at-google....@ffmpeg.org> > wrote: > > > > When a color indexing transform with 16 or fewer colors is used, > > WebP uses "pixel packing", i.e. storing several pixels in one byte, > > which virtually reduces the width of the image (see WebPContext's > > reduced_width field). This reduced_width should always be used when > > reading and applying subsequent transforms. > > > > Fixes: 9368 > > Is there anything in > https://chromium.googlesource.com/webm/libwebp-test-data that covers > this or can you add the file from the ticket to fate? > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel > > To unsubscribe, visit link above, or email > ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe". > _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
