[vlc-devel] [PATCH 2 of 4] avcodec: add HDYC to known ffmpeg chroma table

David Flynn davidf+nntp at woaf.net
Wed Oct 15 10:44:39 CEST 2008

On 2008-10-15, Edouard Gomez <ed.gomez at free.fr> wrote:
> BT709 defines a new chroma conversion matrix, but doesn't specify
> the range.

Rec ITU.R BT.709-5 Part 2 section 5 item 5.6 (quantization levels):
Black level (R',G',B',Y') : 16
Achromatic (Cb, Cr) : 128
Nominal Peak (R', G', B', Y') : 235
Nominal Peak (Cb, Cr) : 16 and 240

for 10bit multiply by 2**2.

NB, ignore part 1 of Rec709, it is the old HDTV system which isn't used.

> Do you want me to submit an updated patch again ?

Please, incorrect comments will just trip people up somewhere else.

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