I am attempting to encode "ProRes 4444" movies with ffmpeg. Some research led me to the "prores_ks" encoder, which is the only one of ffmpeg's prores encoders that supports "4444".
I used this command to test it out (input excluded):
-c:v prores_ks -f mov -profile:v 4444 test.mov
This produces a ProRes 4444 movie. However, the colors appear darker than the original input. After some research I came upon this option:
Adding this filter seems to fix the problem. However, the file size is for some reason considerably bigger. Also, I do not like the idea that a filter has to be performed during this encoding, as I want the highest possible quality. Does anyone know of a way to overcome this "color shift" without a video filter?
ffmpeg -r 24 -i colorbars_8bit.png -c:v prores_ks -profile:v 4444 colorbars_prores_ks.mov: file.io/SeKH8I