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AVPicture https://ffmpeg.org/doxygen/2.7/group__lavc__picture.html#gac1b22e9b246cb8b0928cca8f5fa524d4
AVFrame TODO: what is meant by frame exactly in each codec type?

Stores each plane separately, as the format is more manageable.

You can get a raw byte array with:
```
avpicture_layout
```