Planar
From Avisynth wiki
Planar image format is a format for storing images where each color component needed to represent a pixel is placed at a separate place (block) in memory. This is in contrast with how interleaved images are stored in memory.
- Supported planar formats in AviSynth 2.5: YV12
- Supported planar formats in AviSynth 2.6: Y8, YV12, YV16, YV24, YV411
Some examples of other planar formats: I420 (same as YV12, but the chroma plane order is swapped).
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