memcpy(par->extradata + pos, hevc_data->pps, hevc_data->pps_size);
pos += hevc_data->pps_size;
memcpy(par->extradata + pos, hevc_data->sei, hevc_data->sei_size);
memcpy(par->extradata + pos, hevc_data->pps, hevc_data->pps_size);
pos += hevc_data->pps_size;
memcpy(par->extradata + pos, hevc_data->sei, hevc_data->sei_size);