matroska: default prores fourcc apcn
If there is no codec private data for prores it should default to Apple ProRes 422 Standard Definition (apcn). Can be tested with strobe_scientist.mkv from https://developers.google.com/media/vp9/hdr-encoding
If there is no codec private data for prores it should default to Apple ProRes 422 Standard Definition (apcn). Can be tested with strobe_scientist.mkv from https://developers.google.com/media/vp9/hdr-encoding