Hello, I have used the trial version of unifab to see if the video compressor works correctly with dolby vision and hdr but I see that it does not, you can use hdr ai to give a video in mp4 dolby vision and hdr and by default its size increases a lot but if you want that same processed video to be compressed it loses the dolby vision layer and only the hdr layer remains. The same thing happens if we have a video with heavy hdr10+ and we want it to weigh less, the resulting mp4 will only have hdr as is.
