Comments (2)
So without --enable-full-color-range, all channels (including Alpha) clamped into 16-240 instead of 0-255?
Only a=255 makes full opaque so I think that's the bug.
Also is there a param to replace the alpha layer in an existing avif?
Like:
cavif -i img_with_bad_alpha.avif -o result.avif --???(replace_alpha)??? good_alpha.avif
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@Klanly yes, this is just a bug.
To tell you the truth, I am leaving @link-u and @ryou-kawabata will continue the development of cavif.
I know why this happens and how to fix it, but I made this issue as a training.
So without --enable-full-color-range, all channels (including Alpha) clamped into 16-240 instead of 0-255?
YES.
Also is there a param to replace the alpha layer in an existing avif?
No, we do not a flag like that, because this is just a bug and it also should work with --disable-full-color-range
.
@ryou-kawabata I hope this conversation helps you.
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Related Issues (20)
- Misfunction When Converting from Png Files HOT 2
- Build Errors HOT 3
- [Question] Recommendation for Quality Matching
- macOS Release Builds HOT 1
- Brightness (colors) of AVIF file depends on viewer application HOT 6
- How to enable Full Suport Alpha? HOT 1
- Upgrade deps HOT 1
- Is there a way to target a file size?
- Build error on Centos 8 HOT 2
- won't build on macos HOT 5
- Bug? Different output filesize if --cpu-used 1 and --cpu-used 0 HOT 1
- cavif/external/libavif-container/src/avif/util/File.cpp:5:10: fatal error: filesystem: No such file or directory HOT 1
- jpeg Support? HOT 2
- Debian builds are broken HOT 1
- Support libaom's external partitionig API
- depth encoding HOT 1
- Wrong error message about color type
- 「matrix-coeffcients に bt2020 が指定できませんでした。」
- We moved to avif-community! / avif-communityでの開発に移行しました。 HOT 1
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