X264 命令相关

古城微笑少年丶 2022-07-21 01:57 162阅读 0赞

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转自 [ffmpeg 和 x264的参数对照][ffmpeg _ x264]

## ffmpeg 和 x264的参数对照    ##

<table style="margin:0px; padding:0px; border:1px solid silver; border-collapse:collapse; word-break:break-word; width:827px"> 
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 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> x264 </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> ffmpeg </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 说明 </td> 
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 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 命令行 </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 字段 </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 命令行 </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 字段 </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
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 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> qp qp_constant </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> cqp </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> cqp </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 固定量化因子。取值范围0到51。 经常取值在20-40之间，越小质量 越好,要求的码率越高。0表示无损压缩 </td> 
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 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> max-keyint </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> i_keyint_max </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> g </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> gop_size </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 关键帧的最大间隔帧数 </td> 
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 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> min-keyint </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> i_keyint_min </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> keyint_min </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 关键帧的最小间隔帧数 </td> 
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 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> level </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> i_level_idc </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> level </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 取值范围10-51。 设置比特流的Level。默认40，即4.0。 用来告诉解码器需要支持的什么级别的 兼容性。只有在你知道自己在做什么的 时候才设置该参数。 </td> 
 </tr> 
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 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> frameref </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> i_frame_reference </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> refs </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> B和P帧向前预测参考的帧数。取值范 围1-16。 该值不影响解码的速度，但是越大解码 所需的内存越大。这个值在一般情况下 越大效果越好，但是超过6以后效果就 不明显了。 </td> 
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 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> bframes </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> i_bframe </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> max_b_frames </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 最大B帧数. </td> 
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 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> b-adapt </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> b_bframe_adaptive </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> b_frame_strategy </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 如果为true，则自动决定什么时候需要 插入B帧，最高达到设置的最大B帧数。 如果设置为false,那么最大的B帧数被 使用。 </td> 
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 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> b-pyramid </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> b_bframe_pyramid </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> FLAGS2(CODEC_FLAG2_BPYRAMID) </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 当设置B帧&gt;=2时候，通过开启这个选 项可以获得质量的略微提高，但是没有 任何的速度损失。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> b_deblocking_filter </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> FLAGS(CODEC_FLAG_LOOP_FILTER) </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> deblock </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> i_deblocking_filter_alphac0 </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> deblockalpha </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 </tr> 
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 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> cabac </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> b_cabac </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> coder_type(FF_CODER_TYPE_AC) </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 使用CABAC熵编码技术,为引起轻微的 编码和解码的速度损失，但是可以提高 10%-15%的编码质量。 </td> 
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 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> qmin </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> i_qp_min </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> qmin </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 最小的量化因子。取值范围1-51。建 议在10-30之间。 </td> 
 </tr> 
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 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> qmax </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> i_qp_max&nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> qmax </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 最大的量化因子。取值范围1-51。建 议在10-30之间。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> qpstep qp-step </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> i_qp_step </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> max_qdiff </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 最大的在帧与帧之间进行切变的量化 因子的变化量。 </td> 
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 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> qcomp </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> f_qcompress </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> vbv-maxrate </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> i_vbv_max_bitrate </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> b </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> rc_max_rate </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 允许的最大码流,x264里面以kbps为 单位，ffmpeg以bps为单位 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> vbv-bufsize </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> i_vbv_buffer_size </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> bufsize </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> rc_buffer_size&nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 在指定vbv-maxrate的时候必须设置 该字段。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> vbv-init </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> f_vbv_buffer_init </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> rc_initial_buffer_occupancy </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 初始的缓存占用量 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> qcomp </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> f_qcompress </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> qcompress </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 量化器压缩比率0-1.越小则比特率 越区域固定，但是越高越使量化器 参数越固定。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> direct-pred direct </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> i_direct_mv_pred </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> directpred </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> B帧里面采用的运动侦测的方式。 时间和空间方式大致PSNR和速度 是一致的。设置为auto质量会好一 些，但是速度会下降一些，设置为0 ，质量和速度都会下降.可以选择 none, auto, temporal, spatial. </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> weightb weight-b </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> b_weighted_bipred </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> FLAGS2(CODEC_FLAG2_WPRED) </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 当B帧设置&gt;1时使用 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> partitions analyse </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> inter </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> X264_ANALYSE_I4x4 X264_ANALYSE_I8x8 X264_ANALYSE_PSUB16x16 X264_ANALYSE_PSUB8x8 X264_ANALYSE_BSUB16x16 </td> 
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 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 8x8dct </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> b_transform_8x8 </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> FLAGS(CODEC_FLAG2_8X8DCT) </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> me </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> i_me_method </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> me_method </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 运动侦测的方式 ME_EPZS ME_HEX ME_UMH ME_FULL ME_ESA </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> me-range merange </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> i_me_range </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> me_range </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 运动侦测的半径 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> subq subme </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> i_subpel_refine </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> me_subpel_quality </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 这个参数控制在运动估算过程中质 量和速度的权衡。Subq=5可以压 缩&gt;10%于subq=1。1-7 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> mixed-refs </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> b_mixed_references </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> FLAGS2(CODEC_FLAG2_MIXED_REFS) </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 允许8*8,16*8运动块独立地选择 参考帧，如果disable,则所有的宏 块必须参考同一帧。 需要frameref &gt; 1 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> brdo </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> b_bframe_rdo </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> FLAGS2(CODEC_FLAG2_BRDO) </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 需要subq&gt;6 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> bime </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> b_bidir_me </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> bidir_refine </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 取值范围：true,false.这个值在没 有B帧的时候失效。在双向预测宏块中 双向运动矢量使用。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> trellis </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> i_trellis </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> trellis </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> deadzone-intra </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> i_luma_deadzone </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 没有对应值 </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> deadzone-inter </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> i_luma_deadzone </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 没有对应值 </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> fast-pskip </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> b_fast_pskip </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> FLAGS(CODEC_FLAG2_FASTPSKIP) </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 在P帧内执行早期快速跳跃探测。 这个经常在没有任何损失的前提 下提高了速度。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> dct-decimate </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> b_dct_decimate </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 没有对应值 </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> nr </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> i_noise_reduction </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> noise_reduction </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 0意味着关闭，对于噪声很大的 内容你需要打开。 范围：0-100000 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> interlaced </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> b_interlaced </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 没有对应值 </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> global-header </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> b_repeat_headers </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> FLAGS(CODEC_FLAG_GLOBAL_HEADER) </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 使得SPS和PPS只在流的开始处 产生一次。有些播放器，如SONY 的PSP需要开启此参数。默认的设 置使得SPS和PPS在每一个IDR帧 开始出都进行重复。 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> aud </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> b_aud </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> FLAGS2(CODEC_FLAG2_AUD) </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> threads </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> i_threads </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> thread_count </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 将帧切分成块，由不同的线程进行 分别编码。0-4。 0 for auto </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> rc-eq </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> psz_rc_eq </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> rc_eq </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> --no-psnr </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> b_psnr </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> FLAGS(CODEC_FLAG_PSNR) </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 是否开启PSNR. </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> --no-ssim </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> b_ssim </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 没有对应值 </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> --progress </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> b_progress </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 没有对应值 </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> --bitrate </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> i_bitrate </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> b </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> bit_rate </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 编码输出的比特率,并启用 ABR(Average Birtate&nbsp;模式（i_rc_method), </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> qblur </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> f_qblur </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> qblur </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> f_complexity_blur </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> complexityblur </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 　 &nbsp; </td> 
 </tr> 
 </tbody> 
</table>

===========================================================================

[X264 命令帮助][X264]

## X264 完全命令 ##

x264 core:135 r2345 f0c1c53
 Syntax: x264 [options] -o outfile infile
 
 Infile can be raw (in which case resolution is required),
 or YUV4MPEG (*.y4m),
 or Avisynth if compiled with support (yes).
 or libav* formats if compiled with lavf support (yes) or ffms support (yes).
 Outfile type is selected by filename:
 .264 -> Raw bytestream
 .mkv -> Matroska
 .flv -> Flash Video
 .mp4 -> MP4 if compiled with GPAC support (yes)
 Output bit depth: 8 (configured at compile time)
 
 Options:
 
 -h, --help List basic options
 --longhelp List more options
 --fullhelp List all options
 
 Example usage:
 
 Constant quality mode:
 x264 --crf 24 -o <output> <input>
 
 Two-pass with a bitrate of 1000kbps:
 x264 --pass 1 --bitrate 1000 -o <output> <input>
 x264 --pass 2 --bitrate 1000 -o <output> <input>
 
 Lossless:
 x264 --qp 0 -o <output> <input>
 
 Maximum PSNR at the cost of speed and visual quality:
 x264 --preset placebo --tune psnr -o <output> <input>
 
 Constant bitrate at 1000kbps with a 2 second-buffer:
 x264 --vbv-bufsize 2000 --bitrate 1000 -o <output> <input>
 
 Presets:
 
 --profile <string> Force the limits of an H.264 profile
 Overrides all settings.
 - baseline:
 --no-8x8dct --bframes 0 --no-cabac
 --cqm flat --weightp 0
 No interlaced.
 No lossless.
 - main:
 --no-8x8dct --cqm flat
 No lossless.
 - high:
 No lossless.
 - high10:
 No lossless.
 Support for bit depth 8-10.
 - high422:
 No lossless.
 Support for bit depth 8-10.
 Support for 4:2:0/4:2:2 chroma subsampling.
 - high444:
 Support for bit depth 8-10.
 Support for 4:2:0/4:2:2/4:4:4 chroma subsampling.
 --preset <string> Use a preset to select encoding settings [medium]
 Overridden by user settings.
 - ultrafast:
 --no-8x8dct --aq-mode 0 --b-adapt 0
 --bframes 0 --no-cabac --no-deblock
 --no-mbtree --me dia --no-mixed-refs
 --partitions none --rc-lookahead 0 --ref 1
 --scenecut 0 --subme 0 --trellis 0
 --no-weightb --weightp 0
 - superfast:
 --no-mbtree --me dia --no-mixed-refs
 --partitions i8x8,i4x4 --rc-lookahead 0
 --ref 1 --subme 1 --trellis 0 --weightp 1
 - veryfast:
 --no-mixed-refs --rc-lookahead 10
 --ref 1 --subme 2 --trellis 0 --weightp 1
 - faster:
 --no-mixed-refs --rc-lookahead 20
 --ref 2 --subme 4 --weightp 1
 - fast:
 --rc-lookahead 30 --ref 2 --subme 6
 --weightp 1
 - medium:
 Default settings apply.
 - slow:
 --b-adapt 2 --direct auto --me umh
 --rc-lookahead 50 --ref 5 --subme 8
 - slower:
 --b-adapt 2 --direct auto --me umh
 --partitions all --rc-lookahead 60
 --ref 8 --subme 9 --trellis 2
 - veryslow:
 --b-adapt 2 --bframes 8 --direct auto
 --me umh --merange 24 --partitions all
 --ref 16 --subme 10 --trellis 2
 --rc-lookahead 60
 - placebo:
 --bframes 16 --b-adapt 2 --direct auto
 --slow-firstpass --no-fast-pskip
 --me tesa --merange 24 --partitions all
 --rc-lookahead 60 --ref 16 --subme 11
 --trellis 2
 --tune <string> Tune the settings for a particular type of source
 or situation
 Overridden by user settings.
 Multiple tunings are separated by commas.
 Only one psy tuning can be used at a time.
 - film (psy tuning):
 --deblock -1:-1 --psy-rd <unset>:0.15
 - animation (psy tuning):
 --bframes {+2} --deblock 1:1
 --psy-rd 0.4:<unset> --aq-strength 0.6
 --ref {Double if >1 else 1}
 - grain (psy tuning):
 --aq-strength 0.5 --no-dct-decimate
 --deadzone-inter 6 --deadzone-intra 6
 --deblock -2:-2 --ipratio 1.1 
 --pbratio 1.1 --psy-rd <unset>:0.25
 --qcomp 0.8
 - stillimage (psy tuning):
 --aq-strength 1.2 --deblock -3:-3
 --psy-rd 2.0:0.7
 - psnr (psy tuning):
 --aq-mode 0 --no-psy
 - ssim (psy tuning):
 --aq-mode 2 --no-psy
 - fastdecode:
 --no-cabac --no-deblock --no-weightb
 --weightp 0
 - zerolatency:
 --bframes 0 --force-cfr --no-mbtree
 --sync-lookahead 0 --sliced-threads
 --rc-lookahead 0
 --slow-firstpass Don't force these faster settings with --pass 1:
 --no-8x8dct --me dia --partitions none
 --ref 1 --subme {2 if >2 else unchanged}
 --trellis 0 --fast-pskip
 
 Frame-type options:
 
 -I, --keyint <integer or "infinite"> Maximum GOP size [250]
 -i, --min-keyint <integer> Minimum GOP size [auto]
 --no-scenecut Disable adaptive I-frame decision
 --scenecut <integer> How aggressively to insert extra I-frames [40]
 --intra-refresh Use Periodic Intra Refresh instead of IDR frames
 -b, --bframes <integer> Number of B-frames between I and P [3]
 --b-adapt <integer> Adaptive B-frame decision method [1]
 Higher values may lower threading efficiency.
 - 0: Disabled
 - 1: Fast
 - 2: Optimal (slow with high --bframes)
 --b-bias <integer> Influences how often B-frames are used [0]
 --b-pyramid <string> Keep some B-frames as references [normal]
 - none: Disabled
 - strict: Strictly hierarchical pyramid
 - normal: Non-strict (not Blu-ray compatible)
 --open-gop Use recovery points to close GOPs
 Only available with b-frames
 --no-cabac Disable CABAC
 -r, --ref <integer> Number of reference frames [3]
 --no-deblock Disable loop filter
 -f, --deblock <alpha:beta> Loop filter parameters [0:0]
 --slices <integer> Number of slices per frame; forces rectangular
 slices and is overridden by other slicing options
 --slices-max <integer> Absolute maximum slices per frame; overrides
 slice-max-size/slice-max-mbs when necessary
 --slice-max-size <integer> Limit the size of each slice in bytes
 --slice-max-mbs <integer> Limit the size of each slice in macroblocks (max)
 --slice-min-mbs <integer> Limit the size of each slice in macroblocks (min)
 --tff Enable interlaced mode (top field first)
 --bff Enable interlaced mode (bottom field first)
 --constrained-intra Enable constrained intra prediction.
 --pulldown <string> Use soft pulldown to change frame rate
 - none, 22, 32, 64, double, triple, euro (requires cfr input)
 --fake-interlaced Flag stream as interlaced but encode progressive.
 Makes it possible to encode 25p and 30p Blu-Ray
 streams. Ignored in interlaced mode.
 --frame-packing <integer> For stereoscopic videos define frame arrangement
 - 0: checkerboard - pixels are alternatively from L and R
 - 1: column alternation - L and R are interlaced by column
 - 2: row alternation - L and R are interlaced by row
 - 3: side by side - L is on the left, R on the right
 - 4: top bottom - L is on top, R on bottom
 - 5: frame alternation - one view per frame
 
 Ratecontrol:
 
 -q, --qp <integer> Force constant QP (0-69, 0=lossless)
 -B, --bitrate <integer> Set bitrate (kbit/s)
 --crf <float> Quality-based VBR (0-51) [23.0]
 --rc-lookahead <integer> Number of frames for frametype lookahead [40]
 --vbv-maxrate <integer> Max local bitrate (kbit/s) [0]
 --vbv-bufsize <integer> Set size of the VBV buffer (kbit) [0]
 --vbv-init <float> Initial VBV buffer occupancy [0.9]
 --crf-max <float> With CRF+VBV, limit RF to this value
 May cause VBV underflows!
 --qpmin <integer> Set min QP [0]
 --qpmax <integer> Set max QP [69]
 --qpstep <integer> Set max QP step [4]
 --ratetol <float> Tolerance of ABR ratecontrol and VBV [1.0]
 --ipratio <float> QP factor between I and P [1.40]
 --pbratio <float> QP factor between P and B [1.30]
 --chroma-qp-offset <integer> QP difference between chroma and luma [0]
 --aq-mode <integer> AQ method [1]
 - 0: Disabled
 - 1: Variance AQ (complexity mask)
 - 2: Auto-variance AQ (experimental)
 --aq-strength <float> Reduces blocking and blurring in flat and
 textured areas. [1.0]
 
 -p, --pass <integer> Enable multipass ratecontrol
 - 1: First pass, creates stats file
 - 2: Last pass, does not overwrite stats file
 - 3: Nth pass, overwrites stats file
 --stats <string> Filename for 2 pass stats ["x264_2pass.log"]
 --no-mbtree Disable mb-tree ratecontrol.
 --qcomp <float> QP curve compression [0.60]
 --cplxblur <float> Reduce fluctuations in QP (before curve compression) [20.0]
 --qblur <float> Reduce fluctuations in QP (after curve compression) [0.5]
 --zones <zone0>/<zone1>/... Tweak the bitrate of regions of the video
 Each zone is of the form
 <start frame>,<end frame>,<option>
 where <option> is either
 q=<integer> (force QP)
 or b=<float> (bitrate multiplier)
 --qpfile <string> Force frametypes and QPs for some or all frames
 Format of each line: framenumber frametype QP
 QP is optional (none lets x264 choose). Frametypes: I,i,K,P,B,b.
 K= depending on open-gop setting
 QPs are restricted by qpmin/qpmax.
 
 Analysis:
 
 -A, --partitions <string> Partitions to consider ["p8x8,b8x8,i8x8,i4x4"]
 - p8x8, p4x4, b8x8, i8x8, i4x4
 - none, all
 (p4x4 requires p8x8. i8x8 requires --8x8dct.)
 --direct <string> Direct MV prediction mode ["spatial"]
 - none, spatial, temporal, auto
 --no-weightb Disable weighted prediction for B-frames
 --weightp <integer> Weighted prediction for P-frames [2]
 - 0: Disabled
 - 1: Weighted refs
 - 2: Weighted refs + Duplicates
 --me <string> Integer pixel motion estimation method ["hex"]
 - dia: diamond search, radius 1 (fast)
 - hex: hexagonal search, radius 2
 - umh: uneven multi-hexagon search
 - esa: exhaustive search
 - tesa: hadamard exhaustive search (slow)
 --merange <integer> Maximum motion vector search range [16]
 --mvrange <integer> Maximum motion vector length [-1 (auto)]
 --mvrange-thread <int> Minimum buffer between threads [-1 (auto)]
 -m, --subme <integer> Subpixel motion estimation and mode decision [7]
 - 0: fullpel only (not recommended)
 - 1: SAD mode decision, one qpel iteration
 - 2: SATD mode decision
 - 3-5: Progressively more qpel
 - 6: RD mode decision for I/P-frames
 - 7: RD mode decision for all frames
 - 8: RD refinement for I/P-frames
 - 9: RD refinement for all frames
 - 10: QP-RD - requires trellis=2, aq-mode>0
 - 11: Full RD: disable all early terminations
 --psy-rd <float:float> Strength of psychovisual optimization ["1.0:0.0"]
 #1: RD (requires subme>=6)
 #2: Trellis (requires trellis, experimental)
 --no-psy Disable all visual optimizations that worsen
 both PSNR and SSIM.
 --no-mixed-refs Don't decide references on a per partition basis
 --no-chroma-me Ignore chroma in motion estimation
 --no-8x8dct Disable adaptive spatial transform size
 -t, --trellis <integer> Trellis RD quantization. [1]
 - 0: disabled
 - 1: enabled only on the final encode of a MB
 - 2: enabled on all mode decisions
 --no-fast-pskip Disables early SKIP detection on P-frames
 --no-dct-decimate Disables coefficient thresholding on P-frames
 --nr <integer> Noise reduction [0]
 
 --deadzone-inter <int> Set the size of the inter luma quantization deadzone [21]
 --deadzone-intra <int> Set the size of the intra luma quantization deadzone [11]
 Deadzones should be in the range 0 - 32.
 --cqm <string> Preset quant matrices ["flat"]
 - jvt, flat
 --cqmfile <string> Read custom quant matrices from a JM-compatible file
 Overrides any other --cqm* options.
 --cqm4 <list> Set all 4x4 quant matrices
 Takes a comma-separated list of 16 integers.
 --cqm8 <list> Set all 8x8 quant matrices
 Takes a comma-separated list of 64 integers.
 --cqm4i, --cqm4p, --cqm8i, --cqm8p <list>
 Set both luma and chroma quant matrices
 --cqm4iy, --cqm4ic, --cqm4py, --cqm4pc <list>
 Set individual quant matrices
 
 Video Usability Info (Annex E):
 The VUI settings are not used by the encoder but are merely suggestions to
 the playback equipment. See doc/vui.txt for details. Use at your own risk.
 
 --overscan <string> Specify crop overscan setting ["undef"]
 - undef, show, crop
 --videoformat <string> Specify video format ["undef"]
 - component, pal, ntsc, secam, mac, undef
 --range <string> Specify color range ["auto"]
 - auto, tv, pc
 --colorprim <string> Specify color primaries ["undef"]
 - undef, bt709, bt470m, bt470bg, smpte170m,
 smpte240m, film, bt2020
 --transfer <string> Specify transfer characteristics ["undef"]
 - undef, bt709, bt470m, bt470bg, smpte170m,
 smpte240m, linear, log100, log316,
 iec61966-2-4, bt1361e, iec61966-2-1,
 bt2020-10, bt2020-12
 --colormatrix <string> Specify color matrix setting ["???"]
 - undef, bt709, fcc, bt470bg, smpte170m,
 smpte240m, GBR, YCgCo, bt2020nc, bt2020c
 --chromaloc <integer> Specify chroma sample location (0 to 5) [0]
 --nal-hrd <string> Signal HRD information (requires vbv-bufsize)
 - none, vbr, cbr (cbr not allowed in .mp4)
 --pic-struct Force pic_struct in Picture Timing SEI
 --crop-rect <string> Add 'left,top,right,bottom' to the bitstream-level
 cropping rectangle
 
 Input/Output:
 
 -o, --output <string> Specify output file
 --muxer <string> Specify output container format ["auto"]
 - auto, raw, mkv, flv, mp4
 --demuxer <string> Specify input container format ["auto"]
 - auto, raw, y4m, avs, lavf, ffms
 --input-fmt <string> Specify input file format (requires lavf support)
 --input-csp <string> Specify input colorspace format for raw input
 - valid csps for `raw' demuxer:
 i420, yv12, nv12, i422, yv16, nv16, i444, yv24, bgr, bgra, rgb
 - valid csps for `lavf' demuxer:
 yuv420p, yuyv422, rgb24, bgr24, yuv422p, 
 yuv444p, yuv410p, yuv411p, gray, monow, monob, 
 pal8, yuvj420p, yuvj422p, yuvj444p, xvmcmc, 
 xvmcidct, uyvy422, uyyvyy411, bgr8, bgr4, 
 bgr4_byte, rgb8, rgb4, rgb4_byte, nv12, nv21, 
 argb, rgba, abgr, bgra, gray16be, gray16le, 
 yuv440p, yuvj440p, yuva420p, vdpau_h264, 
 vdpau_mpeg1, vdpau_mpeg2, vdpau_wmv3, 
 vdpau_vc1, rgb48be, rgb48le, rgb565be, 
 rgb565le, rgb555be, rgb555le, bgr565be, 
 bgr565le, bgr555be, bgr555le, vaapi_moco, 
 vaapi_idct, vaapi_vld, yuv420p16le, 
 yuv420p16be, yuv422p16le, yuv422p16be, 
 yuv444p16le, yuv444p16be, vdpau_mpeg4, 
 dxva2_vld, rgb444le, rgb444be, bgr444le, 
 bgr444be, gray8a, bgr48be, bgr48le, yuv420p9be, 
 yuv420p9le, yuv420p10be, yuv420p10le, 
 yuv422p10be, yuv422p10le, yuv444p9be, 
 yuv444p9le, yuv444p10be, yuv444p10le, 
 yuv422p9be, yuv422p9le, vda_vld, gbrp, gbrp9be, 
 gbrp9le, gbrp10be, gbrp10le, gbrp16be, 
 gbrp16le, yuva420p9be, yuva420p9le, 
 yuva422p9be, yuva422p9le, yuva444p9be, 
 yuva444p9le, yuva420p10be, yuva420p10le, 
 yuva422p10be, yuva422p10le, yuva444p10be, 
 yuva444p10le, yuva420p16be, yuva420p16le, 
 yuva422p16be, yuva422p16le, yuva444p16be, 
 yuva444p16le, vdpau, xyz12le, xyz12be, 
 rgba64be, rgba64le, bgra64be, bgra64le, 0rgb, 
 rgb0, 0bgr, bgr0, yuva444p, yuva422p, 
 yuv420p12be, yuv420p12le, yuv420p14be, 
 yuv420p14le, yuv422p12be, yuv422p12le, 
 yuv422p14be, yuv422p14le, yuv444p12be, 
 yuv444p12le, yuv444p14be, yuv444p14le, 
 gbrp12be, gbrp12le, gbrp14be, gbrp14le
 --output-csp <string> Specify output colorspace ["i420"]
 - i420, i422, i444, rgb
 --input-depth <integer> Specify input bit depth for raw input
 --input-range <string> Specify input color range ["auto"]
 - auto, tv, pc
 --input-res <intxint> Specify input resolution (width x height)
 --index <string> Filename for input index file
 --sar width:height Specify Sample Aspect Ratio
 --fps <float|rational> Specify framerate
 --seek <integer> First frame to encode
 --frames <integer> Maximum number of frames to encode
 --level <string> Specify level (as defined by Annex A)
 --bluray-compat Enable compatibility hacks for Blu-ray support
 --stitchable Don't optimize headers based on video content
 Ensures ability to recombine a segmented encode
 
 -v, --verbose Print stats for each frame
 --no-progress Don't show the progress indicator while encoding
 --quiet Quiet Mode
 --log-level <string> Specify the maximum level of logging ["info"]
 - none, error, warning, info, debug
 --psnr Enable PSNR computation
 --ssim Enable SSIM computation
 --threads <integer> Force a specific number of threads
 --lookahead-threads <integer> Force a specific number of lookahead threads
 --sliced-threads Low-latency but lower-efficiency threading
 --thread-input Run Avisynth in its own thread
 --sync-lookahead <integer> Number of buffer frames for threaded lookahead
 --non-deterministic Slightly improve quality of SMP, at the cost of repeatability
 --cpu-independent Ensure exact reproducibility across different cpus,
 as opposed to letting them select different algorithms
 --asm <integer> Override CPU detection
 --no-asm Disable all CPU optimizations
 --opencl Enable use of OpenCL
 --opencl-clbin <string> Specify path of compiled OpenCL kernel cache
 --opencl-device <integer> Specify OpenCL device ordinal
 --visualize Show MB types overlayed on the encoded video
 --dump-yuv <string> Save reconstructed frames
 --sps-id <integer> Set SPS and PPS id numbers [0]
 --aud Use access unit delimiters
 --force-cfr Force constant framerate timestamp generation
 --tcfile-in <string> Force timestamp generation with timecode file
 --tcfile-out <string> Output timecode v2 file from input timestamps
 --timebase <int/int> Specify timebase numerator and denominator
 <integer> Specify timebase numerator for input timecode file
 or specify timebase denominator for other input
 --dts-compress Eliminate initial delay with container DTS hack
 
 Filtering:
 
 --vf, --video-filter <filter0>/<filter1>/... Apply video filtering to the input file
 
 Filter options may be specified in <filter>:<option>=<value> format.
 
 Available filters:
 crop:left,top,right,bottom
 removes pixels from the edges of the frame
 resize:[width,height][,sar][,fittobox][,csp][,method]
 resizes frames based on the given criteria:
 - resolution only: resizes and adapts sar to avoid stretching
 - sar only: sets the sar and resizes to avoid stretching
 - resolution and sar: resizes to given resolution and sets the sar
 - fittobox: resizes the video based on the desired constraints
 - width, height, both
 - fittobox and sar: same as above except with specified sar
 - csp: convert to the given csp. syntax: [name][:depth]
 - valid csp names [keep current]: i420, yv12, nv12, i422, yv16, nv16, i444, yv24, bgr, bgra, rgb
 - depth: 8 or 16 bits per pixel [keep current]
 note: not all depths are supported by all csps.
 - method: use resizer method ["bicubic"]
 - fastbilinear, bilinear, bicubic, experimental, point,
 - area, bicublin, gauss, sinc, lanczos, spline
 select_every:step,offset1[,...]
 apply a selection pattern to input frames
 step: the number of frames in the pattern
 offsets: the offset into the step to select a frame
 see: http://avisynth.org/mediawiki/Select#SelectEvery

[ffmpeg _ x264]: http://www.cnblogs.com/soief/archive/2013/12/12/3471465.html
[X264]: http://x264.janhum.alfahosting.org/fullhelp.txt