hi_venc_h265_cvbr_param

Description

Defines the advanced CVBR parameters of an H.265 encoding channel.

Prototype

typedef struct {
    hi_u32 max_i_proportion;
    hi_u32 min_i_proportion;
    hi_s32 max_reencode_times;
    hi_bool qpmap_en;
    hi_venc_rc_qpmap_mode qpmap_mode;
    hi_u32 max_qp;
    hi_u32 min_qp;
    hi_u32 max_i_qp;
    hi_u32 min_i_qp;
    hi_u32 min_qp_delta;
    hi_u32 max_qp_delta;
    hi_u32 extra_bit_percent;
    hi_u32 long_term_stats_time_unit;
} hi_venc_h265_cvbr_param;

Members

Member	Description
min_i_proportion	Reserved.
max_i_proportion	Maximum ratio of bits allocated to I-frames and P-frames. Value range: [1, 100] Default value: 100
max_reencode_times	Number of times that each frame is re-encoded. If it is set to 0, re-encoding is disabled. Value range: [0, 3] Default value: 2
qpmap_en	Reserved. Whether to enable the QpMap function. The options are as follows: HI_TRUE: enabled HI_FALSE: disabled
qpmap_mode	Reserved. Method of assigning the QP values for CU32 and CU64 when the VENC channel uses the QpMap mode.
max_qp	Maximum QP of P-frames and B-frames. Value range: [min_qp, 51] Default value: 47
min_qp	Minimum QP of P-frames and B-frames. Value range: [0, 51] Default value: 22
max_i_qp	Maximum QP value of I-frames. Value range: [min_i_qp, 51] Default value: 47
min_i_qp	Minimum QP value of I-frames. Value range: [0, 51] Default value: 20
min_qp_delta	Difference between the minimum frame-level QP and the minimum CU-level QP. I-frame: FrameLevelMinQp = min_qp_delta + min_i_qp P-/B-frame: FrameLevelMinQp= min_qp_delta+min_qp Value range: [0, 4] Default value: 0
max_qp_delta	Difference between the maximum frame-level QP and the CU-level maximum QP. Max. QP of I-frames = max_i_qp – max_qp_delta Max. QP of P-/B-frames = max_qp – max_qp_delta Value range: [0, 4] Default value: 0
extra_bit_percent	Maximum percentage of extra bits in the streams output by the encoder. When the bit rate is insufficient, the encoder overdraws a certain number of bits to improve the image quality. The bits will be compensated when the encoding pressure is relieved. Value range: [0, 1000] Default value: 5
long_term_stats_time_unit	Unit (in seconds) of the long-term bit rate statistical period (long_term_stats_time). For example, if long_term_stats_time_unit is set to 60 and long_term_stats_time is set to 3, the long-term statistical period is 3 minutes. Value range: [1, 1800] Default value: 60

Parent topic: VENC/JPEGE