Encoder parameter setting x264

Void
X1__param_default
(X1__param_t * PARAM)

{

......

 
/* Video properties */

Param-> I _csp
= X264_csp_i420;

Param-> I _width
= 352;

Param-> I _height
= 288;

Param-> VUI. I _sar_width = 0;

Param-> VUI. I _sar_height = 0;

Param-> I _fps_num
= 25;

Param-> I _fps_den
= 1;

Param-> I _level_idc
= 40;/* level 4.0 is sufficient for 720x576



16 reference frames */

 
/* Encoder parameters */

 


Param-> I _frame_reference = 1;
//

Number of reference frames

Param-> I _keyint_max = 250;
//


Max
IDR

Frame spacing, default
250

 
Param-> I _keyint_min = 25;


/
/

Minimum
IDR

Frame spacing, default
25

 
Param-> I _bframe = 0;
//


In
IP

Pluggable between frames
B

Maximum number of frames, Range
0 ~ 16

, Default
0

Param-> I _scenecut_threshold = 40;
//


Dynamic screen change limit. When this value is exceeded, insert
I

Frame, default
40

Param-> B _bframe_adaptive = 0 ;//


It seems adaptive.
B

Number of frames

Param-> I _bframe_bias = 0;
//


Insert Control
B

Frame determination, Range
-100 ~ + 100

, The higher the value, the easier it is to insert
B

Frame, default
0

Param-> B _bframe_pyramid = 0;
//


Allow
B

Frame Reference Frame

 

Param-> B _deblocking_filter = 0;

Param-> I _deblocking_filter_alphac0 = 0;

Param-> I _deblocking_filter_beta = 0;

 

Param-> B _cabac = 0;

Param-> I _cabac_init_idc =-1;

 

Param-> RC. B _cbr = 0 ;//


Whether to use bitrate Control

Param-> RC. I _bitrate = 1000;

Param-> RC. f_rate_tolerance = 1.0;

Param-> RC. I _vbv_max_bitrate = 0;

Param-> RC. I _vbv_buffer_size = 0;

Param-> RC. f_vbv_buffer_init = 0.9;

Param-> RC. I _qp_constant = 30;

Param-> RC. I _qp_min = 20;

Param-> RC. I _qp_max = 51;

Param-> RC. I _qp_step = 4;

Param-> RC. f_ip_factor = 1.4;

Param-> RC. f_pb_factor = 1.3;

 

Param-> RC. B _stat_write = 0;

Param-> RC. psz_stat_out = "x264_2pass.log ";

Param-> RC. B _stat_read = 0;

Param-> RC. psz_stat_in = "x264_2pass.log ";

Param-> RC. psz_rc_eq = "blurcplx ^ (1-qcomp )";

Param-> RC. f_qcompress = 1.0;

Param-> RC. f_qblur = 1.0;

Param-> RC. f_complexity_blur = 20;

 

/* Log */

Param-> pf_log = x264_log_default;

Param-> p_log_private = NULL;

Param-> I _log_level = x1__log_none;

 

 
/**/

Param-> analyze. Intra = x264_analyse_i4x4 ;//


Intra-frame prediction Mode

Param-> analyze. Inter = x264_analyse_i4x4 | x264_analyse_psub16x16 | x264_analyse_bsub16x16 ;//


Interframe prediction Mode

Param-> analyze. I _direct_mv_pred = x264_direct_pred_temporal;

Param-> analyze. I _me_method = x1__me_dia ;//


It seems to be the algorithm selection of motion compensation.

Param-> analyze. I _me_range = 8;
// Me


Is
Umh/ESA

Search radius (in pixels), maximum
64

, Default
16

Param-> analyze. I _subpel_refine = 3 ;//


Sub-pixel search range

Param-> analyze. B _chroma_me = 1;

Param-> analyze. I _mv_range = 512 ;//


Motion Vector search range

Param-> analyze. I _chroma_qp_offset = 0;
//


Quantization difference between the color and brightness
,

Range
-12 ~ + 12

, Default
0

Param-> analyze. B _snr = 0 ;//


Signal-to-Noise Ratio

 

Param-> B _aud = 0;

}