Hello, I have been playing with latest xawtv and bttv, and trying to have those two pass between each other data in YCrCb 4:2:2 Planar format (in grabdisplay mode). I have modifed bttv to set the driver and output format as follows: btwrite(BT848_COLOR_FMT_YCrCb422, BT848_COLOR_FMT); p.palette=VIDEO_PALETTE_YUV422; it mostly work, in that I get the output image, except that it looks as if I was looking at picture thru a green glass.. I tried to capure an image of this, but screen snapshoot show up all fine. I tried to change yuv422p_to_rgb24() function in xawtv-3.62:libng/color_yuv2rgb.c to use "YCrCb to RGB" conversion as defined in Bt data scheets but it does not seem to make difference in terms of correctness of conversion. *(d++) = 1.164*(*y-16)+1.596*(*v-128); *(d++) = 1.164*(*y-16)-0.813*(*v-128)-0.391*(*u-128); *(d++) = 1.164*(*y-16)+2.018*(*u-128); any ideas what I might be overlooking? -- Adam http://www.eax.com The Supreme Headquarters of the 32 bit registers
