Labels: Type-Defect Priority-Medium
New issue 401 by geop...@gmail.com
: tiff w/ alpha -> lossless WebP results in distorted alpha channelhttps://bugs.chromium.org/p/webp/issues/detail?id=401
If you convert the attached tiff file into a lossless WebP using cwebp as follows:
cwebp -lossless test.tiff -o test.tiff.webp
then the resulting webp file will not look identical to the input file. Specifically, it appears that the two images diff in their alpha channel values. Interestingly enough, if the -lossless is removed to switch to lossy mode, the problem with the alpha channel goes away.
The cwebp version is 1.0.0.
test.tiff 1.4 KB
test.tiff.webp 1.5 KB
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