通过编译好的x264可执行程序 --fullhelp 即可查询全部参数使用方法和对应的含义。
本文只备注全部参数集合，其中profile、preset、tune参数具体含义可参考：x264编码参数详细介绍：profile、preset、tune_DogDaoDao的博客-CSDN博客
其中cpu、Video properties参数具体含义可参考：x264编码参数详细介绍：cpu与Video properties_DogDaoDao的博客-CSDN博客
Encoder相关参数集具体详细介绍可以参考：x264编码参数详细介绍：Encoder_DogDaoDao的博客-CSDN博客
x264 core:161
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 (no) or ffms support (no).
Outfile type is selected by filename:
.264 -> Raw bytestream
.mkv -> Matroska
.flv -> Flash Video
.mp4 -> MP4 if compiled with GPAC or L-SMASH support (no)
Output bit depth: 8/10
.
Options:
-h, --help List basic options
--longhelp List more options
--fullhelp List all options
Example usage:
Constant quality mode:
x264 --crf 24 -o 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 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:
--direct auto --rc-lookahead 50 --ref 5
--subme 8 --trellis 2
- 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 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 :0.15
- animation (psy tuning):
--bframes {+2} --deblock 1:1
--psy-rd 0.4: --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 :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 Maximum GOP size [250]
-i, --min-keyint Minimum GOP size [auto]
--no-scenecut Disable adaptive I-frame decision
--scenecut How aggressively to insert extra I-frames [40]
--intra-refresh Use Periodic Intra Refresh instead of IDR frames
-b, --bframes Number of B-frames between I and P [3]
--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-pyramid 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 Number of reference frames [3]
--no-deblock Disable loop filter
-f, --deblock Loop filter parameters [0:0]
--slices Number of slices per frame; forces rectangular
slices and is overridden by other slicing options
--slices-max Absolute maximum slices per frame; overrides
slice-max-size/slice-max-mbs when necessary
--slice-max-size Limit the size of each slice in bytes
--slice-max-mbs Limit the size of each slice in macroblocks (max)
--slice-min-mbs 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 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 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
- 6: mono - 2D frame without any frame packing
- 7: tile format - L is on top-left, R split across
Ratecontrol:
-q, --qp Force constant QP (0-81, 0=lossless)
-B, --bitrate Set bitrate (kbit/s)
--crf Quality-based VBR (-12-51) [23.0]
--rc-lookahead Number of frames for frametype lookahead [40]
--vbv-maxrate Max local bitrate (kbit/s) [0]
--vbv-bufsize Set size of the VBV buffer (kbit) [0]
--vbv-init Initial VBV buffer occupancy [0.9]
--crf-max With CRF+VBV, limit RF to this value
May cause VBV underflows!
--qpmin Set min QP [0]
--qpmax Set max QP [81]
--qpstep Set max QP step [4]
--ratetol Tolerance of ABR ratecontrol and VBV [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)
- 2: Auto-variance AQ
- 3: Auto-variance AQ with bias to dark scenes
--aq-strength Reduces blocking and blurring in flat and
textured areas. [1.0]
-p, --pass 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"]
--no-mbtree Disable mb-tree ratecontrol.
--qcomp QP curve compression [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 regions of the video
Each zone is of the form
,,
where is either
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 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 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
--no-weightb Disable weighted prediction for B-frames
--weightp Weighted prediction for P-frames [2]
- 0: Disabled
- 1: Weighted refs
- 2: Weighted refs + Duplicates
--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 [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 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 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 Noise reduction [0]
--deadzone-inter Set the size of the inter luma quantization deadzone [21]
--deadzone-intra Set the size of the intra luma quantization deadzone [11]
Deadzones should be in the range 0 - 32.
--cqm Preset quant matrices ["flat"]
- flat, jvt
--cqmfile Read 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
--range Specify color range ["auto"]
- auto, tv, pc
--colorprim Specify color primaries ["undef"]
- undef, bt709, bt470m, bt470bg, smpte170m,
smpte240m, film, bt2020, smpte428,
smpte431, smpte432
--transfer Specify transfer characteristics ["undef"]
- undef, bt709, bt470m, bt470bg, smpte170m,
smpte240m, linear, log100, log316,
iec61966-2-4, bt1361e, iec61966-2-1,
bt2020-10, bt2020-12, smpte2084, smpte428,
arib-std-b67
--colormatrix Specify color matrix setting ["???"]
- undef, bt709, fcc, bt470bg, smpte170m,
smpte240m, GBR, YCgCo, bt2020nc, bt2020c,
smpte2085, chroma-derived-nc,
chroma-derived-c, ICtCp
--chromaloc Specify chroma sample location (0 to 5) [0]
--alternative-transfer Specify an alternative transfer
characteristics ["undef"]
- same values as --transfer
--nal-hrd Signal HRD information (requires vbv-bufsize)
- none, vbr, cbr (cbr not allowed in .mp4)
--filler Force hard-CBR and generate filler (implied by
--nal-hrd cbr)
--pic-struct Force pic_struct in Picture Timing SEI
--crop-rect Add 'left,top,right,bottom' to the bitstream-level
cropping rectangle
Input/Output:
-o, --output Specify output file
--muxer Specify output container format ["auto"]
- auto, raw, mkv, flv
--demuxer Specify input container format ["auto"]
- auto, raw, y4m, avs
--input-fmt Specify input file format (requires lavf support)
--input-csp Specify input colorspace format for raw input
- valid csps for `raw' demuxer:
i400, i420, yv12, nv12, nv21, i422, yv16, nv16,
yuyv, uyvy, i444, yv24, bgr, bgra, rgb
--output-csp Specify output colorspace ["i420"]
- i400, i420, i422, i444, rgb
--input-depth Specify input bit depth for raw input
--output-depth Specify output bit depth
--input-range Specify input color range ["auto"]
- auto, tv, pc
--input-res Specify input resolution (width x height)
--index Filename for input index 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)
--bluray-compat Enable compatibility hacks for Blu-ray support
--avcintra-class Use compatibility hacks for AVC-Intra class
- 50, 100, 200
--avcintra-flavor AVC-Intra flavor ["panasonic"]
- panasonic, sony
--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 Specify the maximum level of logging ["info"]
- none, error, warning, info, debug
--psnr Enable PSNR computation
--ssim Enable SSIM computation
--threads Force a specific number of threads
--lookahead-threads 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 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 Override CPU detection
--no-asm Disable all CPU optimizations
--opencl Enable use of OpenCL
--opencl-clbin Specify path of compiled OpenCL kernel cache
--opencl-device Specify OpenCL device ordinal
--dump-yuv Save reconstructed frames
--sps-id Set SPS and PPS id numbers [0]
--aud Use access unit delimiters
--force-cfr Force constant framerate timestamp generation
--tcfile-in Force timestamp generation with timecode file
--tcfile-out Output timecode v2 file from input timestamps
--timebase Specify timebase numerator and denominator
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 //... Apply video filtering to the input file
Filter options may be specified in := format.
Available filters:
crop:left,top,right,bottom
removes pixels from the edges of the frame
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.nl/index.php/Select#SelectEvery
