级别: 新手上路
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- 2009-06-17
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引用 最初由 roozhou 发布
x264 --longhelp > x264.txt
打开x264.txt，然后看看你哪些参数里面是没有的
看得我眼都花了，应该提取哪些信息呢？是不是上面要求的都要加呢？有些我只需要默认是不是也要加呢？ - x264 core:67 r1163
- Syntax: x264 [options] -o outfile infile [widthxheight]
- Infile can be raw YUV 4:2:0 (in which case resolution is required),
- or YUV4MPEG 4:2:0 (*.y4m),
- or AVI or Avisynth if compiled with AVIS support (yes).
- or any file that can be rendered in DirectShow.
- Outfile type is selected by filename:
- .264 -> Raw bytestream
- .mkv -> Matroska
- .mp4 -> MP4 if compiled with GPAC support (yes)
- Options:
- -h, --help List the more commonly used options
- --longhelp List all options
- Frame-type options:
- -I, --keyint Maximum GOP size [250]
- -i, --min-keyint Minimum GOP size [6]
- --no-scenecut Disable adaptive I-frame decision
- --scenecut How aggressively to insert extra I-frames [40]
- -b, --bframes Number of B-frames between I and P [0]
- --b-adapt Adaptive B-frame decision method [1]
- Higher values may lower threading efficiency.
- - 0: Disabled
- - 1: Fast
- - 2: Optimal (slow with high --bframes)
- --b-bias Influences how often B-frames are used [0]
- --b-pyramidKeep some B-frames as references
- --no-cabac Disable CABAC
- -r, --ref Number of reference frames [1]
- --no-deblock Disable loop filter
- -f, --deblock Loop filter AlphaC0 and Beta parameters [0:0]
- --interlaced Enable pure-interlaced mode (tff)
- --tff Alias for --interlaced
- --bff Enable pure-interlaced mode (bff)
- Ratecontrol:
- -q, --qp Set QP (0=lossless) [26]
- -B, --bitrate Set bitrate (kbit/s)
- --crf Quality-based VBR (nominal QP)
- --vbv-maxrate Max local bitrate (kbit/s) [0]
- --vbv-bufsize Enable CBR and set size of the VBV buffer (kb) [0]
- --vbv-init Initial VBV buffer occupancy [0.9]
- --qpmin Set min QP [10]
- --qpmax Set max QP [51]
- --qpstep Set max QP step [4]
- --ratetol Allowed variance of average bitrate [1.0]
- --ipratio QP factor between I and P [1.40]
- --pbratio QP factor between P and B [1.30]
- --chroma-qp-offset QP difference between chroma and luma [0]
- --aq-mode AQ method [1]
- - 0: Disabled
- - 1: Variance AQ (complexity mask)
- --aq-strength Reduces blocking and blurring in flat and
- textured areas. [1.0]
- - 0.5: weak AQ
- - 1.5: strong AQ
- -p, --pass <1|2|3> Enable multipass ratecontrol
- - 1: First pass, creates stats file
- - 2: Last pass, does not overwrite stats file
- - 3: Nth pass, overwrites stats file
- --stats Filename for 2 pass stats ["x264_2pass.log"]
- --qcomp QP curve compression: 0.0 => CBR, 1.0 => CQP [0.60]
- --cplxblur Reduce fluctuations in QP
- (before curve compression) [20.0]
- --qblur Reduce fluctuations in QP
- (after curve compression) [0.5]
- --zones //... Tweak the bitrate of some regions of the video
- Each zone is of the form
- ,,
- where
- q= (force QP)
- or b= (bitrate multiplier)
- --qpfile Force frametypes and QPs for some or all frames
- Format of each line: framenumber frametype QP
- QP of -1 lets x264 choose. Frametypes: I,i,P,B,b.
- Analysis:
- -A, --partitions Partitions to consider ["p8x8,b8x8,i8x8,i4x4"]
- - p8x8, p4x4, b8x8, i8x8, i4x4
- - none, all
- (p4x4 requires p8x8. i8x8 requires --8x8dct.)
- --direct Direct MV prediction mode ["spatial"]
- - none, spatial, temporal, auto
- -w, --weightb Weighted prediction for B-frames
- --me 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 Maximum motion vector search range [16]
- --mvrange Maximum motion vector length [-1 (auto)]
- --mvrange-thread Minimum buffer between threads [-1 (auto)]
- -m, --subme Subpixel motion estimation and mode decision [6]
- - 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
- --psy-rd Strength of psychovisual optimization ["1.0:0.0"]
- #1: RD (requires subme>=6)
- #2: Trellis (requires trellis, experimental)
- --mixed-refs Decide references on a per partition basis
- --no-chroma-me Ignore chroma in motion estimation
- -8, --8x8dct Adaptive spatial transform size
- -t, --trellis Trellis RD quantization. Requires CABAC. [0]
- - 0: disabled
- - 1: enabled only on the final encode of a MB
- - 2: enabled on all mode decisions
- --no-fast-pskipDisables early SKIP detection on P-frames
- --no-dct-decimate Disables coefficient thresholding on P-frames
- --nr Noise reduction [0]
- --deadzone-inter Size of the inter luma quantization deadzone [21]
- --deadzone-intra Size of the intra luma quantization deadzone [11]
- Deadzones should be in the range 0 - 32.
- --cqm Preset quant matrices ["flat"]
- - jvt, flat
- --cqmfile Custom quant matrices from a JM-compatible file
- Overrides any other --cqm* options.
- --cqm4
Set all 4x4 quant matrices - Takes a comma-separated list of 16 integers.
- --cqm8
Set all 8x8 quant matrices - Takes a comma-separated list of 64 integers.
- --cqm4i, --cqm4p, --cqm8i, --cqm8p
- Set both luma and chroma quant matrices
- --cqm4iy, --cqm4ic, --cqm4py, --cqm4pc
- 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 Specify crop overscan setting ["undef"]
- - undef, show, crop
- --videoformat Specify video format ["undef"]
- - component, pal, ntsc, secam, mac, undef
- --fullrange Specify full range samples setting ["off"]
- - off, on
- --colorprim Specify color primaries ["undef"]
- - undef, bt709, bt470m, bt470bg
- smpte170m, smpte240m, film
- --transfer Specify transfer characteristics ["undef"]
- - undef, bt709, bt470m, bt470bg, linear,
- log100, log316, smpte170m, smpte240m
- --colormatrix Specify color matrix setting ["undef"]
- - undef, bt709, fcc, bt470bg
- smpte170m, smpte240m, GBR, YCgCo
- --chromaloc Specify chroma sample location (0 to 5) [0]
- Input/Output:
- -o, --output Specify output file
- --sar width:height Specify Sample Aspect Ratio
- --fps Specify framerate
- --seek First frame to encode
- --frames Maximum number of frames to encode
- --level Specify level (as defined by Annex A)
- -v, --verbose Print stats for each frame
- --progress Show a progress indicator while encoding
- --quietQuiet Mode
- --no-psnr Disable PSNR computation
- --no-ssim Disable SSIM computation
- --threads Parallel encoding
- --thread-input Run Avisynth in its own thread
- --non-deterministicSlightly improve quality of SMP,
- at the cost of repeatability
- --asm Override CPU detection
- --no-asm Disable all CPU optimizations
- --visualizeShow MB types overlayed on the encoded video
- --dump-yuv Save reconstructed frames
- --sps-id Set SPS and PPS id numbers [0]
- --swapuv Swap UV planes, only available with RAW YUV input
- --timescale Manually set pts timescale [auto]
- --timecode Specify output timecode file
- --deldup
- Enable near duplicate frame remover prefilter
- : specify the minimum fps
- : luma threshold [0.8]
- ,: if the number of
- 8x8 blocks with SAD larger than mbthresh
- exceeds mbmax, it will be considered
- a non-duplicate frame [400,width/10]
- : chroma theshold [lthresh*2]
- --smoothts Adjust timestamps so that video plays smoothly
- --ivtc Enable field matching pre-filter
- require YUY2 input from DirectShow
- - a: auto
- - t: tff
- - b: bff
- --sub Load a subtitle using VobSub (need vsfilter.dll)
- --starttime Start encoding at specified position
- --endtime Stop encoding at specified position
- --versioninfo Write version information in stream header
- --aud Use access unit delimiters
- --nal-hrd Use NAL HRD parameters
- --pulldown Use 3:2 pulldown
- - 32: TBT,BT,BTB,BT pattern
- - 64: triple,double *recommended for 720p
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