4.X264.c中,h = x264_encoder_open( param ) )是用來復(fù)制參數(shù)并驗(yàn)證參數(shù)的有效性,在CCS下應(yīng)該是不需要驗(yàn)證參數(shù)的(參數(shù)都是在程序中設(shè)置好的),因此此處只作復(fù)制參數(shù)param和初始化X264_T h的操作.(VC下程序修改記錄080106下午)

修改COMMON.C中的void??? x264_param_default( x264_param_t *param )(即設(shè)置param的默認(rèn)參數(shù))為:

void??? x264_param_default( x264_param_t *param )
{
??? /* */
??? memset( param, 0, sizeof( x264_param_t ) );

??? /* CPU autodetect */
//?? param->cpu = x264_cpu_detect();
param->cpu = 0;
??? param->i_threads = 1;

??? /* Video properties */
??? param->i_csp?????????? = X264_CSP_I420;
??? param->i_width???????? = 0;
??? param->i_height??????? = 0;
??? param->vui.i_sar_width = 0;
??? param->vui.i_sar_height= 0;
//??? param->vui.i_overscan = 0; /* undef */
//??? param->vui.i_vidformat = 5; /* undef */
//??? param->vui.b_fullrange = 0; /* off */
//??? param->vui.i_colorprim = 2; /* undef */
//??? param->vui.i_transfer = 2; /* undef */
//??? param->vui.i_colmatrix = 2; /* undef */
//??? param->vui.i_chroma_loc= 0; /* left center */

??? param->i_fps_num?????? = 25;
??? param->i_fps_den?????? = 1;
//?? param->i_level_idc???? = 51; /* as close to "unrestricted" as we can get */
param->i_level_idc???? = 40; /* level 4.0 is sufficient for 720x576 with16 reference frames */

??? /* Encoder parameters */
??? param->i_frame_reference = 1;
??? param->i_keyint_max = 250;
??? param->i_keyint_min = 25;
??? param->i_bframe = 0;?? // 在IP幀之間可插入的B幀數(shù)量最大值，范圍0~16，默認(rèn)0
??? param->i_scenecut_threshold = 40; ;// 畫面動(dòng)態(tài)變化限，當(dāng)超出此值時(shí)插入I幀，默認(rèn)40
//??? param->b_bframe_adaptive = 1; 好像是自適應(yīng)的B幀個(gè)數(shù)
param->b_bframe_adaptive = 0;
??? param->i_bframe_bias = 0;
??? param->b_bframe_pyramid = 0;

//??? param->b_deblocking_filter = 1; //去塊效應(yīng)相關(guān)
param->b_deblocking_filter = 0;
??? param->i_deblocking_filter_alphac0 = 0;
??? param->i_deblocking_filter_beta = 0;

//??? param->b_cabac = 1;
param->b_cabac = 0;
//??? param->i_cabac_init_idc = 0;
param->i_cabac_init_idc = -1;

??? param->rc.i_rc_method = X264_RC_CQP; //使用恒定質(zhì)量方式
??? param->rc.i_bitrate = 0;
??? 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 = 26;
??? param->rc.i_rf_constant = 0;
??? param->rc.i_qp_min = 10;
??? 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 = 0.6;
??? param->rc.f_qblur = 0.5;
??? param->rc.f_complexity_blur = 20;
??? param->rc.i_zones = 0;

??? /* Log */
??? param->pf_log = x264_log_default;
??? param->p_log_private = NULL;
??? param->i_log_level = X264_LOG_INFO;

??? /* */
//?? param->analyse.intra = X264_ANALYSE_I4x4 | X264_ANALYSE_I8x8;
param->analyse.intra = X264_ANALYSE_I4x4;
//??? param->analyse.inter = X264_ANALYSE_I4x4 | X264_ANALYSE_I8x8
//???????????????????????? | X264_ANALYSE_PSUB16x16 | X264_ANALYSE_BSUB16x16;
param->analyse.inter = X264_ANALYSE_I4x4
?????????????????????????? | X264_ANALYSE_PSUB16x16 | X264_ANALYSE_BSUB16x16;
??? param->analyse.i_direct_mv_pred = X264_DIRECT_PRED_SPATIAL;
//?? param->analyse.i_me_method = X264_ME_HEX;
param->analyse.i_me_method = X264_ME_DIA; //使用菱形搜索
??? param->analyse.i_me_range = 16;
//??? param->analyse.i_subpel_refine = 5;
param->analyse.i_subpel_refine = 3; 亞像素搜索范圍
??? param->analyse.b_chroma_me = 1;
//?? param->analyse.i_mv_range = -1; // set from level_idc
param->analyse.i_mv_range = 512;//運(yùn)動(dòng)向量搜索范圍
??? param->analyse.i_chroma_qp_offset = 0; //色度和亮度之間的量化差,范圍-12~+12，默認(rèn)0
??? param->analyse.b_fast_pskip = 1;
??? param->analyse.b_dct_decimate = 1;
//??? param->analyse.b_psnr = 1;
param->analyse.b_psnr = 0; //是否使用信噪比

??? param->i_cqm_preset = X264_CQM_FLAT;
??? memset( param->cqm_4iy, 16, 16 );
??? memset( param->cqm_4ic, 16, 16 );
??? memset( param->cqm_4py, 16, 16 );
??? memset( param->cqm_4pc, 16, 16 );
??? memset( param->cqm_8iy, 16, 64 );
??? memset( param->cqm_8py, 16, 64 );

??? param->b_repeat_headers = 1;
??? param->b_aud = 0;
}

修改后對(duì)foreman01.yuv編碼速率由1.82fps提高到3.03fps

?

將main函數(shù)改為:

int main( int argc, char **argv )
{
??? x264_param_t param;
??? cli_opt_t opt;
/*??????????????????????????????????????????????????????? 主要是屏蔽以下四句,因?yàn)樵贑CS下不需要
#ifdef _MSC_VER
??? _setmode(_fileno(stdin), _O_BINARY);
??? _setmode(_fileno(stdout), _O_BINARY);
#endif
*/
??? x264_param_default( &param );

??? /* Parse command line */
??? if( Parse( argc, argv, &param, &opt ) < 0 )
??????? return -1;

??? /* Control-C handler */??????????????? //用來判斷是否按下CTRL+C鍵,若按下則退出命令行模式
//?? signal( SIGINT, SigIntHandler );

??? return Encode( &param, &opt );
}

程序可運(yùn)行,fps無影響

將X264程序中的muxers.c,matroskv.c文件刪除,其中的i

int open_file_yuv( char *psz_filename, hnd_t *p_handle, x264_param_t *p_param );
int get_frame_total_yuv( hnd_t handle );
int read_frame_yuv( x264_picture_t *p_pic, hnd_t handle, int i_frame );
int close_file_yuv( hnd_t handle );

int open_file_bsf( char *psz_filename, hnd_t *p_handle );
int set_param_bsf( hnd_t handle, x264_param_t *p_param );
int write_nalu_bsf( hnd_t handle, uint8_t *p_nal, int i_size );
int set_eop_bsf( hnd_t handle, x264_picture_t *p_picture );
int close_file_bsf( hnd_t handle );

extern int (*p_open_infile)( char *psz_filename, hnd_t *p_handle, x264_param_t *p_param );
extern int (*p_get_frame_total)( hnd_t handle );
extern int (*p_read_frame)( x264_picture_t *p_pic, hnd_t handle, int i_frame );
extern int (*p_close_infile)( hnd_t handle );

在X264.c中重寫.

muxer和matroskv文件的一些函數(shù)主要是定義了對(duì)mp4,y4m,mkv文件格式的輸入輸出支持,修改后程序則只能執(zhí)行YUV格式的輸入輸出了.運(yùn)行正常,2.97fps

4.X264.c中,h = x264_encoder_open( param ) )是用來復(fù)制參數(shù)并驗(yàn)證參數(shù)的有效性,在CCS下應(yīng)該是不需要驗(yàn)證參數(shù)的(參數(shù)都是在程序中設(shè)置好的),因此此處只作復(fù)制參數(shù)param和初始化X264_T h的操作.

但是也不能將static int x264_validate_parameters( x264_t *h )函數(shù)屏蔽了,因?yàn)槔锩孢€有其它賦值操作,在此函數(shù)中刪除了判斷圖像的寬高,CSP420的語句,速度3.36fps

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