Peter Rabbitson wrote:
-c:v libx264 -colorspace bt709 -pix_fmt yuv444p -profile:v
high444 \
-qp 0 -preset:v ultrafast \
-t 5 greenz.mkv
FWIW just using -colorspace is not complete.
ffmpeg -i greenz.mkv would list 709/unknown/unknown
adding
-color_primaries bt709 -color_trc bt709
removes the unknowns and for ffmpeg changes behavior in one
test case I tried = retesting making a png. Your command will
produce a different png from the mkv than one made from an
mkv made with the two extra params.
The difference is gamma meta - many viewers may ignore it anyway
- it's just an example.
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