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请教一个问题,x264里面可以设置2个aq值吗?

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比如很多片子里面的参数都有这个,aq=1:-0.25:10.00 / aq2=1:1.50:20.00,一直不明白是什么意思,2个aq同时起效?他们怎么工作的,意义是什么啊,还有是怎么设置的啊。。。实在搞不明白,请教大家。
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只看该作者 1楼 发表于: 2010-09-23
mixaq,vaq+haq toka

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只看该作者 2楼 发表于: 2010-09-23
某x264的longhelp返回...

x264 core:68 r1181 49bf767
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).
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

Presets:

--profile Force H.264 profile [high]
Overrides all settings
- baseline,main,high
--presetUse a preset to select encoding settings [medium]
Overridden by user settings
- ultrafast,veryfast,fast,medium
- slow,slower,placebo
--tune Tune the settings for a particular type of source
Overridden by user settings
- film,animation,grain,psnr,ssim,touhou
--slow-firstpassDon't use faster settings with --pass 1

Frame-type options:

-I, --keyint Maximum GOP size [250]
-i, --min-keyint Minimum GOP size [25]
--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 [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
--no-cabac Disable CABAC
-r, --ref Number of reference frames [3]
--no-deblockDisable loop filter
-f, --deblock Loop filter AlphaC0 and Beta parameters [0:0]
--interlacedEnable pure-interlaced mode (tff)
--tff Alias for --interlaced
--bff Enable pure-interlaced mode (bff)

Ratecontrol:

-q, --qp Set QP (0=lossless) [23]
-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 (kbit) [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)
- 2: Variance-Hadamard AQ (complexity mask)
--aq-strength Reduces blocking and blurring in flat and
textured areas. [1.0]
- 0.5: weak AQ
- 1.5: strong AQ
--aq-sensitivity "Center" of AQ curve. [10.0]
- 5: most QPs are raised
- 10: good general-use sensitivity
- 15: most QPs are lowered
--aq2-strength Use 2nd AQ (Haali's AQ) algorithm for support. [0.0]
0.0: no 2nd AQ
1.1: strong 2nd AQ
--aq2-sensitivity "Flatness" threshold to trigger 2nd AQ [15.0]
5: applies to almost all blocks
22: only flat blocks

--aq-debug Filename for AQ debug log ["x264_aq_debug.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
,,
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只看该作者 3楼 发表于: 2010-09-23
楼上2位大师能说的详细点吗,比如aq=1:-0.25:10.00 / aq2=1:1.50:20.00这个,写成命令行是怎么样的?如何会出现-0.25这个负值啊?还有还是不知道2次aq是什么意义
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只看该作者 4楼 发表于: 2010-09-23
哦,我明白了,原来是非官方的aq,那么请问下哪里能下载到不同的aq啊?
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只看该作者 5楼 发表于: 2010-10-08

Follow me: @06_taro

MediaFire links to:
Taro's tools (avs plugins & other useful tools' builds)
Taro's x264 builds (Latest build: x264 core:129 r2245+704_tMod (&tMod+10bit/MixAQ/OreAQ), Win & MacOS, built on 10 Jan 2012, gcc: 4.7.2)

nmm牆內鏡像(部分工具)
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