avifdec - decompress an AVIF file to an image file
avifdec [options] input.avif
output.[jpg|jpeg|png|y4m]
avifdec --info input.avif
avifdec decompresses an AVIF file to an image file. Output
format can be either JPEG, PNG or YUV4MPEG2 (Y4M).
- -h, --help
- Show syntax help.
- -V, --version
- Show the version number.
- -j, --jobs
J
- Number of jobs (worker threads), or `all' to potentially use as many cores
as possible. (Default: all).
- -c, --codec
C
- Codec to use.
Possible values depend on the codecs enabled at build time (see
--help or --version for the available codecs). Default is
auto-selected from the available codecs.
- Possible values
are:
- •
- aom
- •
- dav1d
- •
- libgav1
- -d, --depth
D
- Output depth, either 8 or 16. (PNG only; For y4m, depth is retained, and
JPEG is always 8bpc).
- -q, --quality
Q
- Output quality in 0..100. (JPEG only, default: 90).
- --png-compress
L
- PNG compression level in 0..9 (PNG only; 0=none, 9=max). Defaults to
libpng’s builtin default.
- -u, --upsampling
U
- Chroma upsampling (for 420/422). One of `automatic' (default), `fastest',
`best', `nearest', or `bilinear'.
- -r,
--raw-color
- Output raw RGB values instead of multiplying by alpha when saving to
opaque formats (JPEG only; not applicable to y4m).
- --index
I
- When decoding an image sequence or progressive image, specify which frame
index to decode, where the first frame has index 0, or `all' to decode all
frames. (Default: 0)
- --progressive
- Enable progressive AVIF processing. If a progressive image is encountered
and --progressive is passed, avifdec will use --index to choose which
layer to decode (in progressive order).
- --no-strict
- Disable strict decoding, which disables strict validation checks and
errors.
- -i, --info
- Decode all frames and display all image information instead of saving to
disk.
- --icc
FILENAME
- Provide an ICC profile payload (implies --ignore-icc).
- --ignore-icc
- If the input file contains an embedded ICC profile, ignore it (no-op if
absent).
- --size-limit
C
- Maximum image size (in total pixels) that should be tolerated. (Default:
268435456).
- --dimension-limit
C
- Maximum image dimension (width or height) that should be tolerated. Set to
0 to ignore. (Default: 32768).
- --
- Signal the end of options. Everything after this is interpreted as file
names.