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Old 16th March 2018, 09:31   #11  |  Link
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Selur's Avatar
Join Date: Oct 2001
Location: Germany
Posts: 5,712
@all: Is there some documentation about the command line parametes of aomenc somewhere?
Looking at the output of 'aomenc --help' there a quite a few option without explanations about min/max values of the arguments or what the default argument is.
Usage: aomenc.exe <options> -o dst_filename src_filename 

            --help                     	Show usage options and exit
  -c <arg>, --cfg=<arg>                	Config file to use
  -D,       --debug                    	Debug mode (makes output deterministic)
  -o <arg>, --output=<arg>             	Output filename
            --codec=<arg>              	Codec to use
  -p <arg>, --passes=<arg>             	Number of passes (1/2)
            --pass=<arg>               	Pass to execute (1/2)
            --fpf=<arg>                	First pass statistics file name
            --limit=<arg>              	Stop encoding after n input frames
            --skip=<arg>               	Skip the first n input frames
            --good                     	Use Good Quality Deadline
  -q,       --quiet                    	Do not print encode progress
  -v,       --verbose                  	Show encoder parameters
            --psnr                     	Show PSNR in status line
            --webm                     	Output WebM (default when WebM IO is enabled)
            --ivf                      	Output IVF
            --obu                      	Output OBU
  -P,       --output-partitions        	Makes encoder output partitions. Requires IVF output!
            --q-hist=<arg>             	Show quantizer histogram (n-buckets)
            --rate-hist=<arg>          	Show rate histogram (n-buckets)
            --disable-warnings         	Disable warnings about potentially incorrect encode settings.
  -y,       --disable-warning-prompt   	Display warnings, but do not prompt user to continue.
            --test-decode=<arg>        	Test encode/decode mismatch
                                       	  off, fatal, warn

Encoder Global Options:
            --yv12                     	Input file is YV12 
            --i420                     	Input file is I420 (default)
            --i422                     	Input file is I422
            --i444                     	Input file is I444
            --i440                     	Input file is I440
  -u <arg>, --usage=<arg>              	Usage profile number to use
  -t <arg>, --threads=<arg>            	Max number of threads to use
            --profile=<arg>            	Bitstream profile number to use
  -w <arg>, --width=<arg>              	Frame width
  -h <arg>, --height=<arg>             	Frame height
            --forced_max_frame_width   	Maximum frame width value to force
            --forced_max_frame_height  	Maximum frame height value to force
            --stereo-mode=<arg>        	Stereo 3D video format
                                       	  mono, left-right, bottom-top, top-bottom, right-left
            --timebase=<arg>           	Output timestamp precision (fractional seconds)
            --fps=<arg>                	Stream frame rate (rate/scale)
            --error-resilient=<arg>    	Enable error resiliency features
  -b <arg>, --bit-depth=<arg>          	Bit depth for codec (8 for version <=1, 10 or 12 for version 2)
                                       	  8, 10, 12
            --lag-in-frames=<arg>      	Max number of frames to lag
            --large-scale-tile=<arg>   	Large scale tile coding (0: off (default), 1: on)
            --monochrome               	Monochrome video (no chroma planes)

Rate Control Options:
            --drop-frame=<arg>         	Temporal resampling threshold (buf %)
            --resize-mode=<arg>        	Frame resize mode
            --resize-denominator=<arg> 	Frame resize denominator
            --resize-kf-denominator=<ar	Frame resize keyframe denominator
            --superres-mode=<arg>      	Frame super-resolution mode
            --superres-denominator=<arg	Frame super-resolution denominator
            --superres-kf-denominator=<	Frame super-resolution keyframe denominator
            --superres-qthresh=<arg>   	Frame super-resolution qindex threshold
            --superres-kf-qthresh=<arg>	Frame super-resolution keyframe qindex threshold
            --end-usage=<arg>          	Rate control mode
                                       	  vbr, cbr, cq, q
            --target-bitrate=<arg>     	Bitrate (kbps)
            --min-q=<arg>              	Minimum (best) quantizer
            --max-q=<arg>              	Maximum (worst) quantizer
            --undershoot-pct=<arg>     	Datarate undershoot (min) target (%)
            --overshoot-pct=<arg>      	Datarate overshoot (max) target (%)
            --buf-sz=<arg>             	Client buffer size (ms)
            --buf-initial-sz=<arg>     	Client initial buffer size (ms)
            --buf-optimal-sz=<arg>     	Client optimal buffer size (ms)

Twopass Rate Control Options:
            --bias-pct=<arg>           	CBR/VBR bias (0=CBR, 100=VBR)
            --minsection-pct=<arg>     	GOP min bitrate (% of target)
            --maxsection-pct=<arg>     	GOP max bitrate (% of target)

Keyframe Placement Options:
            --kf-min-dist=<arg>        	Minimum keyframe interval (frames)
            --kf-max-dist=<arg>        	Maximum keyframe interval (frames)
            --disable-kf               	Disable keyframe placement

AV1 Specific Options:
            --cpu-used=<arg>           	CPU Used (0..8)
            --dev-sf=<arg>             	Dev Speed (0..255)
            --auto-alt-ref=<arg>       	Enable automatic alt reference frames
            --sharpness=<arg>          	Loop filter sharpness (0..7)
            --static-thresh=<arg>      	Motion detection threshold
            --single-tile-decoding=<arg	Single tile decoding (0: off (default), 1: on)
            --tile-columns=<arg>       	Number of tile columns to use, log2
            --tile-rows=<arg>          	Number of tile rows to use, log2 (set to 0 while threads > 1)
            --tile-loopfilter-v=<arg>  	Enable loop filter across vertical tile boundary
            --tile-loopfilter-h=<arg>  	Enable loop filter across horizontal tile boundary
            --arnr-maxframes=<arg>     	AltRef max frames (0..15)
            --arnr-strength=<arg>      	AltRef filter strength (0..6)
            --tune=<arg>               	Distortion metric tuned with
                                       	  psnr, ssim, cdef-dist, daala-dist
            --cq-level=<arg>           	Constant/Constrained Quality level
            --max-intra-rate=<arg>     	Max I-frame bitrate (pct)
            --max-inter-rate=<arg>     	Max P-frame bitrate (pct)
            --gf-cbr-boost=<arg>       	Boost for Golden Frame in CBR mode (pct)
            --lossless=<arg>           	Lossless mode (0: false (default), 1: true)
            --enable-cdef=<arg>        	Enable the constrained directional enhancement filter (0: false, 1: true (default))
            --enable-restoration=<arg> 	Enable the loop restoration filter (0: false, 1: true (default))
            --enable-qm=<arg>          	Enable quantisation matrices (0: false (default), 1: true)
            --qm-min=<arg>             	Min quant matrix flatness (0..15), default is 8
            --qm-max=<arg>             	Max quant matrix flatness (0..15), default is 15
            --enable-dist-8x8=<arg>    	Enable dist-8x8 (0: false (default), 1: true)
            --frame-parallel=<arg>     	Enable frame parallel decodability features (0: false (default), 1: true)
            --aq-mode=<arg>            	Adaptive quantization mode (0: off (default), 1: variance 2: complexity, 3: cyclic refresh)
            --deltaq-mode=<arg>        	Delta qindex mode (0: off (default), 1: deltaq 2: deltaq + deltalf)
            --frame-boost=<arg>        	Enable frame periodic boost (0: off (default), 1: on)
            --noise-sensitivity=<arg>  	Noise sensitivity (frames to blur)
            --tune-content=<arg>       	Tune content type
                                       	  default, screen
            --cdf-update-mode=<arg>    	CDF update mode for entropy coding (0: no CDF update; 1: update CDF on all frames(default); 2: selectively update CDF on some frames
            --color-primaries=<arg>    	Color primaries (CICP) of input content:
                                       	  bt709, unspecified, bt601, bt470m, bt470bg, smpte240, film, bt2020, xyz, smpte431, smpte432, ebu3213
            --transfer-characteristics=	Transfer characteristics (CICP) of input content:
                                       	  unspecified, bt709, bt470m, bt470bg, bt601, smpte240, lin, log100, log100sq10, iec61966, bt1361, srgb, bt2020-10bit, bt2020-12bit, smpte2084, hlg, smpte428
            --matrix-coefficients=<arg>	Matrix coefficients (CICP) of input content:
                                       	  identity, bt709, unspecified, fcc73, bt470bg, bt601, smpte240, ycgco, bt2020ncl, bt2020cl, smpte2085, chromncl, chromcl, ictcp
            --chroma-sample-position=<a	The chroma sample position when chroma 4:2:0 is signaled:
                                       	  unknown, vertical, colocated
            --min-gf-interval=<arg>    	min gf/arf frame interval (default 0, indicating in-built behavior)
            --max-gf-interval=<arg>    	max gf/arf frame interval (default 0, indicating in-built behavior)
            --sb-size=<arg>            	Superblock size to use
                                       	  dynamic, 64, 128
            --num-tile-groups=<arg>    	Maximum number of tile groups, default is 1
            --mtu-size=<arg>           	MTU size for a tile group, default is 0 (no MTU targeting), overrides maximum number of tile groups
            --timing-info=<arg>        	Signal timing info in the bitstream:
                                       	  unspecified, constant
            --disable-tempmv=<arg>     	Disable temporal mv prediction (default is 0)
  -b <arg>, --bit-depth=<arg>          	Bit depth for codec (8 for version <=1, 10 or 12 for version 2)
                                       	  8, 10, 12
            --input-bit-depth=<arg>    	Bit depth of input

Stream timebase (--timebase):
  The desired precision of timestamps in the output, expressed
  in fractional seconds. Default is 1/1000.

Included encoders:

    av1    - AOMedia Project AV1 Encoder 0.1.0-8663-gaf35e318e (default)

        Use --codec to switch to a non-default encoder.
So I'm wondering is there some documentation somewhere what all those parameters are for and what their values are?
Or is this simply still to early to expect a bit more detailed documentation?
Seeing that a few folks did some tests here I wonder how they chose the settings they used. (some parameters are kept from vpx, but quite a few are new)

Cu Selur
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