Value | Description |
---|---|
3 | 4: 4: 4 encoding preserves full chroma resolution |
2 | 4: 2: 2 encoding reduces chroma resolution to 1/2 of luminance resolution |
1 | 4: 2: 0 encoding reduces chroma resolution to 1/4 of luminance resolution |
0 | 4: 0: 0 encoding discards all chroma content, preserving luminance only. Because the codec uses a slightly modified definition of luminance to improve performance, it is preferred to convert an RGB image to monochrome before encoding rather than use this chroma subsampling mode |