[HELP] ProRes 422 HQ -> 8-Bit PNG -> x264 -> Problem with colors

[TR2N]

The images do not contain headers which would tell Hybrid whether they use limited or full range or what color matrix should be used.
If you import an image sequence (images are in RGB) you need to tell Hybrid which LumaRange and ColorMatrix it should use to concert between RGB and YUV.

master was encoded to ProRes 422HQ using Hybrid and processed in VEAI to PNG8

If the colors are still okay in the ProRes 422HQ from Hybrid, the question is what VEAI does with the input and how it converts the prores file to PNG.
I have no clue whether VEAI uses the BT.601/BT470bg color matrix and limited luma range, or whether it may be always assumes the source is full range and uses bt.709 one something else. It might assume a specific color matrix depending on the input resolultion.
My guess is that VEAI always assumes limited-range (which is bad if the input isn't limited range) and bt601/bt470b color matrix (which is bad if the input uses bt709), but I don't know for sure and can only guess.

do i have to choose the value the original source had, in my case the DVD (BT.601/BT470bg) and TV (limited range) in the 'Image Sequence selection' dialog?

Yes, you have to set those values, but since I have no clue what VEAI does I can't recommend anything other than: Try&See which values work.


Cu Selur

:-) Okay. I will try it with some test encodes. Will report when i found out what to set.