/usr/bin/avifenc

Syntax: avifenc [options] input.[jpg|jpeg|png|y4m] output.avif
Standard options:
    -h,--help                         : Show syntax help (this page)
    -V,--version                      : Show the version number

Basic options:
    -q,--qcolor Q                     : Quality for color in 0..100 where 100 is lossless
    --qalpha Q                        : Quality for alpha in 0..100 where 100 is lossless
    -s,--speed S                      : Encoder speed in 0..10 where 0 is the slowest, 10 is the fastest. Or 'default' or 'd' for codec internal defaults. (Default: 6)

Advanced options:
    -j,--jobs J                       : Number of jobs (worker threads), or 'all' to potentially use as many cores as possible. (Default: all)
    --no-overwrite                    : Never overwrite existing output file
    -o,--output FILENAME              : Instead of using the last filename given as output, use this filename
    -l,--lossless                     : Set all defaults to encode losslessly, and emit warnings when settings/input don't allow for it
    -d,--depth D[,Dextension]         : D is the output bit depth per channel. D must be 8, 10 or 12. (JPEG/PNG only; y4m: D must match the input bit depth, and Dextension is unsupported)
                                        If specified, Dextension adds a hidden encoded image of Dextension bit depth in the same file as the primary image to reach 16-bit depth at decoding.
                                        See avifSampleTransformRecipe for the supported combinations (8,8 and 12,4 and 12,8).
    -y,--yuv FORMAT                   : Output format, one of 'auto' (default), 444, 422, 420 or 400. Ignored for y4m (y4m format is retained)
                                        For JPEG, auto honors the JPEG's internal format, if possible. For grayscale PNG, auto defaults to 400. For all other cases, auto defaults to 444
    -p,--premultiply                  : Premultiply color by the alpha channel and signal this in the AVIF
    --sharpyuv                        : Use sharp RGB to YUV420 conversion (if supported). Ignored for y4m or if output is not 420.
    --stdin                           : Read input from stdin instead of file paths. No other input is allowed. The input format is assumed to be y4m unless --input-format is specified. The output file path must still be provided.
    --input-format FORMAT             : File format of the input data. One of: jpeg/png/y4m/auto. (Default: auto, except for stdin where auto is not supported and the default is y4m)
    --cicp,--nclx P/T/M               : Set CICP values (nclx colr box) (3 raw numbers, use -r to set range flag)
                                        P = color primaries
                                        T = transfer characteristics
                                        M = matrix coefficients
                                        Use 2 for any you wish to leave unspecified
    -r,--range RANGE                  : YUV range, one of 'limited' or 'l', 'full' or 'f'. (JPEG/PNG only, default: full; For y4m, range is retained)
    --target-size S                   : Set target file size in bytes (up to 7 times slower)
    --progressive                     : Automatically set parameters to encode a simple layered image supporting progressive rendering from a single input frame.
    --layered                         : Encode a layered AVIF. Each input is encoded as one layer and at most 4 layers can be encoded.
    -g,--grid MxN                     : Encode a single-image grid AVIF with M cols & N rows. Either supply MxN identical W/H/D images, or a single
                                        image that can be evenly split into the MxN grid and follow AVIF grid image restrictions. The grid will adopt
                                        the color profile of the first image supplied.
    -c,--codec C                      : Codec to use (choose from versions list below)
    --exif FILENAME                   : Provide an Exif metadata payload to be associated with the primary item (implies --ignore-exif)
    --xmp FILENAME                    : Provide an XMP metadata payload to be associated with the primary item (implies --ignore-xmp)
    --icc FILENAME                    : Provide an ICC profile payload to be associated with the primary item (implies --ignore-icc)
    --timescale,--fps V               : Timescale for image sequences. If all frames are 1 timescale in length, this is equivalent to frames per second. (Default: 30)
                                        If neither duration nor timescale are set, avifenc will attempt to use the framerate stored in a y4m header, if present.
    --creation-time                   : Creation time for image sequences, in seconds since 1970-01-01 00:00:00 UTC (the Unix epoch). (Default: 0, use the modification time)
    --modification-time               : Modification time for image sequences, in seconds since 1970-01-01 00:00:00 UTC (the Unix epoch). (Default: 0, use the current time)
    -k,--keyframe INTERVAL            : Maximum keyframe interval for image sequences (any set of INTERVAL consecutive frames will have at least one keyframe). Set to 0 to disable (default).
    --ignore-exif                     : If the input file contains embedded Exif metadata, ignore it (no-op if absent)
    --ignore-xmp                      : If the input file contains embedded XMP metadata, ignore it (no-op if absent)
    --ignore-profile,--ignore-icc     : If the input file contains an embedded color profile, ignore it (no-op if absent)
    --pasp H,V                        : Add pasp property (aspect ratio). H=horizontal spacing, V=vertical spacing
    --crop CROPX,CROPY,CROPW,CROPH    : Add clap property (clean aperture), but calculated from a crop rectangle
    --clap WN,WD,HN,HD,HON,HOD,VON,VOD: Add clap property (clean aperture). Width, Height, HOffset, VOffset (in numerator/denominator pairs)
    --irot ANGLE                      : Add irot property (rotation), in 0..3. Makes (90 * ANGLE) degree rotation anti-clockwise
    --imir AXIS                       : Add imir property (mirroring). 0=top-to-bottom, 1=left-to-right
    --clli MaxCLL,MaxPALL             : Add clli property (content light level information).
    --repetition-count N              : Number of times an animated image sequence will be repeated, or 'infinite' for infinite repetitions. (Default: infinite)
    --                                : Signal the end of options. Everything after this is interpreted as file names.

Updatable options:
  The following options can optionally have a :u (or :update) suffix like `-q:u Q`, to apply only to input files appearing after the option:
    -q,--qcolor Q                     : Quality for color in 0..100 where 100 is lossless
    --qalpha Q                        : Quality for alpha in 0..100 where 100 is lossless
    --tilerowslog2 R                  : log2 of number of tile rows in 0..6. (Default: 0)
                                        If specified, switch to manual tiling.
    --tilecolslog2 C                  : log2 of number of tile columns 0..6. (Default: 0)
                                        If specified, switch to manual tiling.
    --autotiling                      : Set --tilerowslog2 and --tilecolslog2 automatically
                                        If specified, switch to automatic tiling.
                                        avifenc starts in automatic tiling mode.
    --min QP                          : Deprecated, use -q 0..100 instead
    --max QP                          : Deprecated, use -q 0..100 instead
    --minalpha QP                     : Deprecated, use --qalpha 0..100 instead
    --maxalpha QP                     : Deprecated, use --qalpha 0..100 instead
    --scaling-mode N[/D]              : Set frame (layer) scaling mode as given fraction. If omitted, the denominator defaults to 1. (Default: 1/1)
    --duration D                      : Frame durations (in timescales) (default: 1). This option always applies to following inputs with or without the `:u` suffix.
    -a,--advanced KEY[=VALUE]         : Pass an advanced, codec-specific key/value string pair directly to the codec. avifenc will warn on any not used by the codec.

aom-specific advanced options:
    1. <key>=<value> applies to both the color (YUV) planes and the alpha plane (if present).
    2. color:<key>=<value> or c:<key>=<value> applies only to the color (YUV) planes.
    3. alpha:<key>=<value> or a:<key>=<value> applies only to the alpha plane (if present).
       Since the alpha plane is encoded as a monochrome image, the options that refer to the chroma planes,
       such as enable-chroma-deltaq=B, should not be used with the alpha plane. In addition, the film grain
       options are unlikely to make sense for the alpha plane.

    When used with libaom 3.0.0 or later, any key-value pairs supported by the aom_codec_set_option() function
    can be used. When used with libaom 2.0.x or older, the following key-value pairs can be used:

    aq-mode=M                         : Adaptive quantization mode. 0=off (default), 1=variance, 2=complexity, 3=cyclic refresh
    cq-level=Q                        : Constant/Constrained Quality level in 0..63, end-usage must be set to cq or q
    enable-chroma-deltaq=B            : Enable delta quantization in chroma planes. 0=disable (default), 1=enable
    end-usage=MODE                    : Rate control mode, one of 'vbr', 'cbr', 'cq', or 'q'
    sharpness=S                       : Bias towards block sharpness in rate-distortion optimization of transform coefficients in 0..7. (Default: 0)
    tune=METRIC                       : Tune the encoder for distortion metric, one of 'psnr', 'ssim' or 'iq'.
                                        (Default for color: still non-RGB images (libaom v3.13.0+): iq, otherwise: ssim; default for alpha: psnr)
    film-grain-test=TEST              : Film grain test vectors in 0..16. 0=none (default), 1=test1, 2=test2, ... 16=test16
    film-grain-table=FILENAME         : Path to file containing film grain parameters

Version: 1.4.2 (dav1d [dec]:1.5.4-0-g54706fc, aom [enc/dec]:3.15.3)
libyuv : unavailable