Difference between this block's final quantization parameter and the corresponding per-frame value.
Distance in luma pixels from the top-left corner of the visible frame to the top-left corner of the block. Can be negative if top/right padding is present on the coded frame.
Width and height of the block in luma pixels.
Data structure for storing block-level encoding information. It is allocated as a part of AVVideoEncParams and should be retrieved with av_video_enc_params_block().
sizeof(AVVideoBlockParams) is not a part of the ABI and new fields may be added to it.