[FFmpeg-user] Does converting to yuv444p by default make sense?

thljcl jiachielee at live.com
Thu Aug 1 18:49:41 CEST 2013

Look at Page 42 of the H.264 Specification Ed 8.0

“For convenience of notation and terminology in this Specification, the
variables and terms associated with these arrays are referred to as luma (or
L or Y) and chroma, where the two chroma arrays are referred to as Cb and
Cr; regardless of the actual color representation method in use. The actual
color representation method in use can be indicated in syntax that is
specified in Annex E. The (monochrome) auxiliary arrays, which may or may
not be present as auxiliary pictures in a coded video sequence, are optional
for decoding and can be used for such purposes as alpha blending.”

It’s asking you to look at Annex E. So go to Annex E, Look at table E-3.

It specifically mentioned sRGB.

Of course, there are many RGB-based color spaces being mentioned, with sRGB
being one of them. Either way, it just shows that YCbCr is just a "relative
color space".

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