FullHelp x264

Miércoles, 6 de enero de 2010
x264 core:80 r1376 3feaec2

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 Avisynth if compiled with support (native).
Outfile type is selected by filename:
.264 -> Raw bytestream
.mkv -> Matroska
.flv -> Flash Video
.mp4 -> MP4 if compiled with GPAC support (yes)
-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>
x264 –crf 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>
–profile               Force H.264 profile [high]
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
–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 –ref 1 –scenecut 0
–subme 0 –trellis 0 –no-weightb
–weightp 0
- veryfast:
–no-mbtree –me dia –no-mixed-refs
–partitions i8x8,i4x4 –ref 1
–subme 1 –trellis 0 –weightp 0
- faster:
–no-mbtree –no-mixed-refs –refs 2
–subme 4 –weightp 1
- fast
–rc-lookahead 30 –ref 2 –subme 6
- 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 –me-range 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 –me-range 24 –partitions all
–rc-lookahead 60 –ref 16 –subme 10
–trellis 2
–tune                  Tune the settings for a particular type of source
Overridden by user settings
- film:
–deblock -1:-1 –psy-rd <unset>:0.15
- animation:
–bframes {+2} –deblock 1:1
–psy-rd 0.4:<unset> –aq-strength 0.6
–ref {Double if >1 else 1}
- grain:
–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
- psnr:
–aq-mode 0 –no-psy
- ssim:
–aq-mode 2 –no-psy
- fastdecode:
–no-cabac –no-deblock –no-weightb
–weightp 0
- zerolatency:
–bframes 0 –rc-lookahead 0
–sync-lookahead 0 –sliced-threads
- touhou:
–aq-strength 1.3 –deblock -1:-1
–partitions {p4x4 if p8x8 set}
–psy-rd <unset>:0.2
–ref {Double if >1 else 1}
–slow-firstpass        Don’t use faster settings with –pass 1
Frame-type options:
-I, –keyint <integer>      Maximum GOP size [250]
-i, –min-keyint <integer>  Minimum GOP size [25]
–no-scenecut Disable adaptive I-frame decision
–scenecut <integer>    How aggressively to insert extra I-frames [40]
-b, –bframes <integer>     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 <integer>      Influences how often B-frames are used [0]
–b-pyramid <string>    Keep some B-frames as references [none]
- none: Disabled
- strict: Strictly hierarchical pyramid
- normal: Non-strict (not Blu-ray compatible)
–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
–slice-max-size <integer> Limit the size of each slice in bytes
–slice-max-mbs <integer> Limit the size of each slice in macroblocks
–interlaced Enable pure-interlaced mode
–constrained-intra Enable constrained intra prediction.
-q, –qp <integer>          Force constant QP (0-51, 0=lossless)
-B, –bitrate <integer>     Set bitrate (kbit/s)
–crf <float>           Quality-based VBR (0-51, 0=lossless) [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]
–qpmin <integer>       Set min QP [10]
–qpmax <integer>       Set max QP [51]
–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 <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 <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 of -1 lets x264 choose. Frametypes: I,i,P,B,b.
QPs are restricted by qpmin/qpmax.
-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 Weighted prediction for P-frames [2]
- 0: Disabled
- 1: Blind offset
- 2: Smart analysis
–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
–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 <integer>     Trellis RD quantization. Requires CABAC. [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 4×4 quant matrices
Takes a comma-separated list of 16 integers.
cqm8 <list>           Set all 8×8 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 <string>     Specify crop overscan setting ["undef"]
- undef, show, crop
videoformat <string>  Specify video format ["undef"]
- component, pal, ntsc, secam, mac, undef
fullrange <string>    Specify full range samples setting ["off"]
- off, on
colorprim <string>    Specify color primaries ["undef"]
- undef, bt709, bt470m, bt470bg
smpte170m, smpte240m, film
transfer <string>     Specify transfer characteristics ["undef"]
- undef, bt709, bt470m, bt470bg, linear,
log100, log316, smpte170m, smpte240m
colormatrix <string>  Specify color matrix setting ["undef"]
- undef, bt709, fcc, bt470bg
smpte170m, smpte240m, GBR, YCgCo
chromaloc <integer>   Specify chroma sample location (0 to 5) [0]
-o, –output Specify output file
stdout Specify stdout format ["raw"]
- raw, mkv, flv
stdin Specify stdin format ["yuv"]
- yuv, y4m
–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)
-v, –verbose Print stats for each frame
–no-progress Don’t show the progress indicator while encoding
quiet Quiet Mode
psnr Enable PSNR computation
ssim Enable SSIM computation
threads <integer>     Force a specific number of 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
–asm <integer>         Override CPU detection
–no-asm Disable all CPU optimizations
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
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