Offset in bytes from the beginning of this structure at which the array of blocks starts.
Quantisation parameter offset from the base (per-frame) qp for a given plane (first index) and AC/DC coefficients (second index).
Number of blocks in the array.
Base quantisation parameter for the frame. The final quantiser for a given block in a given plane is obtained from this value, possibly combined with {@code delta_qp} and the per-block delta in a manner documented for each type.
Type of the parameters (the codec they are used with).
Video encoding parameters for a given frame. This struct is allocated along with an optional array of per-block AVVideoBlockParams descriptors. Must be allocated with av_video_enc_params_alloc().