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Interesting post! I have one question about terminology though: when you refer to “players“, do you mean all kinds of players or just physical hardware devices
by josteink 7y ago
Interesting post!
I have one question about terminology though: when you refer to “players“, do you mean all kinds of players or just physical hardware devices like Blu-ray players?
I ask because I haven’t had/observed any issues or defects with colour in software/PC-based desktop serious at all.
Disclaimer: not in the Blu-ray-authoring business.
- bscphil 7y agoI'm referring to both. It's more likely, I suppose, that software players could have problems in this area, but that's simply because many of them are free and they don't have to pass any kind of certification process. As a matter of fact, all well known software players I've encountered seem to do this right. Regular limited range YUV works pretty much everywhere. Doubly compressed YUV (the encoding mistake I was talking about) works nowhere because the data in the file is incorrect and has to be manually filtered to repair the damage.
- layoutIfNeeded 7y agoIt’s pretty easy to verify: create a uniform white png and convert it to yuv420p h264 via ffmpeg: ffmpeg -i input.png -pix_fmt yuv420p movie.mp4 Open in VLC or your favourite player and take a screenshot. Now check with a color picker whether you have white as 255 or 235. Update: checked with VLC and QuickTime Player, both handled it correctly and displayed white as 255.