PIX FMT YUV420P: Difference between revisions
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* Cr ([[chrominance]] red) channel. | * Cr ([[chrominance]] red) channel. | ||
The [[chrominance]] is [[subsampled]] using the '''420''' scheme: | The [[chrominance]] is [[subsampling|subsampled]] using the '''420''' scheme: | ||
Note: Be careful not to confuse this pixel format with [[PIX_FMT_YUVJ420P]]. | Note: Be careful not to confuse this pixel format with [[PIX_FMT_YUVJ420P]]. |
Latest revision as of 02:30, 4 June 2007
PIX_FMT_YUV420P contains three channels (or components):
- Y' (luminance) channel
- Cb (chrominance blue) channel
- Cr (chrominance red) channel.
The chrominance is subsampled using the 420 scheme:
Note: Be careful not to confuse this pixel format with PIX_FMT_YUVJ420P.
YCbCr 4:2:0 indicates a planar YCbCr colorspace where a 2x2 block of pixels in an image is represented by 4 Y samples, 1 for each pixel, but all 4 pixels share a Cb sample and a Cr sample.
Note: The P in YUV420P indicates planar not progressive or palette or packed.
It has the following characteristics:
- YUV colorspace.
- 12bits per pixel average.