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| -rw-r--r-- | DOCS/tech/colorspaces.txt | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/DOCS/tech/colorspaces.txt b/DOCS/tech/colorspaces.txt index f64311ace8..b1d7d6f22e 100644 --- a/DOCS/tech/colorspaces.txt +++ b/DOCS/tech/colorspaces.txt @@ -33,12 +33,17 @@ note: this formule doesn't contain the +128 offsets of U,V values! Conclusion: Y = luminance, the weighted average of R G B components. (0=black 255=white) U = Cb = blue component (0=green 128=grey 255=blue) -V = Cv = red component (0=green 128=grey 255=red) +V = Cr = red component (0=green 128=grey 255=red) MPlayer side: ============= In MPlayer, we usually have 3 pointers to the Y, U and V planes, so it -doesn't matter what is they order in memory. +doesn't matter what is they order in memory: + for mp_image_t and libvo's draw_slice(): + planes[0] = Y = luminance + planes[1] = U = Cb = blue + planes[2] = V = Cr = red + But there are some codecs (vfw, dshow) and vo drivers (xv) ignoring the 2nd and 3rd pointer, and use only a single pointer to the planar yuv image. In this case we must know the right order and alignment of planes in the memory! |