hi_venc_h264_avbr_param

说明

定义H264协议编码通道AVBR码率控制模式的高级参数。

定义

hi_venc_h264_avbr_param = {"chg_pos": chg_pos,
                           "max_i_proportion": max_i_proportion,
                           "min_i_proportion": min_i_proportion,
                           "max_reencode_times": max_reencode_times,
                           "qpmap_en": qpmap_en,
                           "min_still_percent": min_still_percent,
                           "max_still_qp": max_still_qp,
                           "min_still_psnr": min_still_psnr,
                           "max_qp": max_qp,
                           "min_qp": min_qp,
                           "max_i_qp": max_i_qp,
                           "min_i_qp": min_i_qp,
                           "min_qp_delta": min_qp_delta,
                           "motion_sensitivity": motion_sensitivity,
                           "save_bitrate_en": save_bitrate_en}

成员

max_bit_rate表示运动场景下的最大码率，max_bit_rate*chg_pos*min_still_percent 表示静止情况下的最小码率。

根据运动程度的不同，目标码率会在最大码率和最小码率间调整。max_qp，min_qp用于控制图像的质量范围，码率控制以QP钳位为最高优先级，超出min_qp，max_qp范围内码率控制将失效。