Returning to the issue of oversaturated colors of some videos on wide-gamut displays:
For the sample video, I made the following test: in the video player that was using madVR, switched to interpreting video as full range (via madVR shortcut) and made a screenshot in PNG. Then opened it in Photoshop and analyzed the values in the areas of these artifacts.
Red areas were indeed oversaturated in R channel (highest R was 255), but G and B were less than 252 (and even less that 235 in green area), although R values were 0 (or close to zero) there. So, most of the visible problems are in areas with R not in range 16-235 (or even 1-254).
Here is the captured frame:
Photoshop_-_Color_Lookup_Table.mkv_-_00000.png
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Originally Posted by huhn
it could be clipped.
there are for sure mathematical ways to ignore 0-16 and 236-255 or they could be mapped to 16/235.
of cause i have no clue how much work that is.
Quote:
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As for the range of the original video - I couldn't understand your answer on whether it's limited or not.
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should be limited(a normal video). it is not worth to check it with a histogram and the issue has nothing to do with the range anyway. |
It seems that either the video is badly encoded, or it is wrongfully interpreted.
Anyway, does it really has any sense to have values 0 and 255 pass to 3D LUT then?