欧美偷拍97色伦综合_ ffmpeg應用x264編碼，編碼參數解析

應用X264進(jìn)行H.264編碼，如果編碼不能成功，大部分情況是編碼參數選擇不正確

請看圖片：

這里邊的編碼參數大家應該看到了吧，那么如果我們用ffmpeg怎么設置這些編碼參數呢？

代碼為證：

m_VCtx->codec_type = CODEC_TYPE_VIDEO;
m_VCtx->bit_rate = bitrate * 1000;
m_VCtx->width = width;
m_VCtx->height = height;
m_VCtx->time_base.den = fps;
m_VCtx->time_base.num = 1;
m_VCtx->gop_size = fps * 10;
//m_VCtx->gop_size = 1;
m_VCtx->crf = 26;
m_VCtx->refs = 3;
m_VCtx->flags2 = CODEC_FLAG2_MIXED_REFS;
m_VCtx->max_b_frames = 3;
m_VCtx->deblockbeta = -1;
m_VCtx->deblockalpha = -1;
m_VCtx->trellis = 2;
m_VCtx->partitions = X264_PART_I4X4 | X264_PART_I8X8 | X264_PART_P8X8 | X264_PART_P4X4 | X264_PART_B8X8;
m_VCtx->flags2 |= CODEC_FLAG2_8X8DCT;
m_VCtx->me_method = 8;
m_VCtx->me_range = 16;
m_VCtx->me_subpel_quality = 7;
m_VCtx->qmin = 10;
m_VCtx->qmax = 51;
m_VCtx->rc_initial_buffer_occupancy = 0.9;
m_VCtx->i_quant_factor = 1.0 / 1.40f; // x4->params.rc.f_ip_factor = 1 / fabs(avctx->i_quant_factor);
m_VCtx->b_quant_factor = 1.30f;
m_VCtx->chromaoffset = 0;
m_VCtx->max_qdiff = 4;
m_VCtx->qcompress = 0.6f;
m_VCtx->complexityblur = 20.0f;
m_VCtx->qblur = 0.5f;
m_VCtx->directpred = 1;
m_VCtx->noise_reduction = 0;
m_VCtx->pix_fmt = PIX_FMT_YUV420P;
m_VCtx->thread_count = 1;
m_VCtx->scenechange_threshold = 40;
m_VCtx->bframebias = 0;
m_VCtx->flags2 |= CODEC_FLAG2_AUD;
m_VCtx->coder_type = FF_CODER_TYPE_AC;
m_VCtx->flags |= CODEC_FLAG_LOOP_FILTER;
m_VCtx->me_cmp = FF_CMP_CHROMA;
m_VCtx->flags2 |= CODEC_FLAG2_FASTPSKIP;
m_VCtx->flags2 |= CODEC_FLAG2_BPYRAMID;
m_VCtx->flags2 |= CODEC_FLAG_NORMALIZE_AQP;
m_VCtx->flags2 |= CODEC_FLAG2_WPRED;
m_VCtx->keyint_min = 25;
m_VCtx->flags2 |= CODEC_FLAG2_MBTREE;
// m_VCtx->rc_min_rate =1024 * 1000;
// m_VCtx->rc_max_rate = 1024 * 1000;
// m_VCtx->bit_rate_tolerance = 1024 * 1000;
// m_VCtx->rc_buffer_size=1024 * 1000;
// m_VCtx->rc_initial_buffer_occupancy = m_VCtx->rc_buffer_size*3/4;
// m_VCtx->rc_buffer_aggressivity= (float)1.0;
// m_VCtx->rc_initial_cplx= 0.5;
//m_VCtx->ticks_per_frame = 2;
m_VCtx->level = 30;
m_VCtx->b_frame_strategy = 2;
m_VCtx->codec_tag = 7; // FLV must not = 0 {CODEC_ID_H264, FLV_CODECID_H264 },

m_VCtx->codec_type= CODEC_TYPE_VIDEO;m_VCtx->bit_rate = bitrate * 1000;m_VCtx->width = width;m_VCtx->height = height;m_VCtx->time_base.den = fps;m_VCtx->time_base.num = 1;m_VCtx->gop_size = fps * 10;//m_VCtx->gop_size = 1;m_VCtx->crf = 26;m_VCtx->refs = 3;m_VCtx->flags2 = CODEC_FLAG2_MIXED_REFS;m_VCtx->max_b_frames = 3;m_VCtx->deblockbeta = -1;m_VCtx->deblockalpha = -1;m_VCtx->trellis = 2;m_VCtx->partitions = X264_PART_I4X4 | X264_PART_I8X8 |X264_PART_P8X8 | X264_PART_P4X4 | X264_PART_B8X8;m_VCtx->flags2 |= CODEC_FLAG2_8X8DCT;m_VCtx->me_method = 8;m_VCtx->me_range = 16;m_VCtx->me_subpel_quality = 7;m_VCtx->qmin = 10;m_VCtx->qmax = 51;m_VCtx->rc_initial_buffer_occupancy = 0.9;m_VCtx->i_quant_factor = 1.0 / 1.40f; //x4->params.rc.f_ip_factor = 1 / fabs(avctx->i_quant_factor);m_VCtx->b_quant_factor = 1.30f;m_VCtx->chromaoffset = 0;m_VCtx->max_qdiff = 4;m_VCtx->qcompress = 0.6f;m_VCtx->complexityblur = 20.0f;m_VCtx->qblur = 0.5f;m_VCtx->directpred = 1;m_VCtx->noise_reduction = 0;m_VCtx->pix_fmt = PIX_FMT_YUV420P;m_VCtx->thread_count = 1;m_VCtx->scenechange_threshold = 40;m_VCtx->bframebias = 0;m_VCtx->flags2 |= CODEC_FLAG2_AUD;m_VCtx->coder_type = FF_CODER_TYPE_AC;m_VCtx->flags |= CODEC_FLAG_LOOP_FILTER;m_VCtx->me_cmp = FF_CMP_CHROMA;m_VCtx->flags2 |= CODEC_FLAG2_FASTPSKIP;m_VCtx->flags2 |= CODEC_FLAG2_BPYRAMID;m_VCtx->flags2 |= CODEC_FLAG_NORMALIZE_AQP;m_VCtx->flags2 |= CODEC_FLAG2_WPRED;m_VCtx->keyint_min = 25;m_VCtx->flags2 |= CODEC_FLAG2_MBTREE;// 	m_VCtx->rc_min_rate =1024 * 1000;// 	m_VCtx->rc_max_rate = 1024 * 1000;// 	m_VCtx->bit_rate_tolerance = 1024 * 1000;// 	m_VCtx->rc_buffer_size=1024 * 1000;// 	m_VCtx->rc_initial_buffer_occupancy =m_VCtx->rc_buffer_size*3/4;// 	m_VCtx->rc_buffer_aggressivity= (float)1.0;// 	m_VCtx->rc_initial_cplx= 0.5;//m_VCtx->ticks_per_frame = 2;m_VCtx->level = 30;m_VCtx->b_frame_strategy = 2;m_VCtx->codec_tag = 7; // FLV must not = 0  {CODEC_ID_H264,FLV_CODECID_H264  },

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