proc av_video_enc_params_alloc(type: AVVideoEncParams; nb_blocka: cuint;
                               out_size: ptr csize_t): ptr AVVideoEncParams {.
    importc, cdecl, ...raises: [], tags: [], forbids: [].}

proc av_video_enc_params_block(par: ptr AVVideoEncParams; idx: cuint): ptr AVVideoBlockParams {.
    importc, cdecl, ...raises: [], tags: [], forbids: [].}

proc av_video_enc_params_create_side_data(frame: ptr AVFrame;
    type: AVVideoEncParamsType; nb_blocks: cuint): ptr AVVideoEncParams {.
    importc, cdecl, ...raises: [], tags: [], forbids: [].}