[FFmpeg-user] The internal ffmpeg rgb=>yuv pipeline and conversion matrices
adf.lists at gmail.com
Wed May 11 01:26:44 CEST 2016
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
-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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