Opened 6 years ago
Last modified 23 months ago
#7090 open defect
avfilter : color_range of frame incorrectly flagged as limited
| Reported by: | mvignali | Owned by: | |
|---|---|---|---|
| Priority: | normal | Component: | avfilter |
| Version: | unspecified | Keywords: | |
| Cc: | Blocked By: | ||
| Blocking: | Reproduced by developer: | no | |
| Analyzed by developer: | no |
Description
Summary of the bug:
Full range frame (at least for rgb)
are send to filter, in limited range.
How to reproduce:
./ffmpeg -i ./fate-suite/mov/mov_alpha_premult.mov -vf unpremultiply=inplace=1 resStraight.png -y
Same thing appear using png as input for example.
Change History (2)
comment:2 by , 23 months ago
Lol, here is the fix:
https://ffmpeg.org/pipermail/ffmpeg-devel/2018-March/226763.html
though apparently there is some metadata there? https://ffmpeg.org/pipermail/ffmpeg-devel/2018-March/226799.html
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Well, yes, ffplay.exe -i mov_alpha_premult.mov -vf extractplanes=r
shows the difference with RGBA png file.
I will point out that alpha is also not bitperfect between the two.