avifdec

Decode AVIF images to standard formats

TLDR

Decode AVIF to PNG

$ avifdec [input.avif] [output.png]

Decode to JPEG with specific quality

$ avifdec -q [85] [input.avif] [output.jpg]

Show image information only

$ avifdec -i [input.avif]

Decode with 16-bit depth (PNG only)

$ avifdec -d 16 [input.avif] [output.png]

Decode using multiple threads

$ avifdec -j [4] [input.avif] [output.png]

SYNOPSIS

avifdec [options] input.avif output

avifdec decodes AVIF (AV1 Image File Format) images to standard formats like PNG, JPEG, or Y4M. AVIF is a modern image format offering superior compression and quality compared to JPEG.The tool is part of libavif and enables viewing and converting AVIF images to more widely supported formats.

PARAMETERS

-c codec

AV1 codec to use (aom, dav1d, libgav1). Default: auto-selected from available codecs

-d depth

Output bit depth, 8 or 16 (PNG only; JPEG is always 8bpc)

-q quality

Output JPEG quality, 0-100 (default: 90)

-j jobs

Number of worker threads, or 'all' for all cores (default: all)

-i, --info

Display image information instead of saving to disk

--png-compress level

PNG compression level, 0-9 (0=none, 9=max)

--chroma-upsampling mode

Chroma upsampling for 420/422: automatic, fastest, best, nearest, bilinear (default: automatic)

--ignore-icc

Ignore embedded ICC color profile

--index n

Decode specific frame index, or 'all' for every frame (default: 0)

--no-strict

Disable strict validation checks

-r

Output raw RGB values instead of premultiplying by alpha

FEATURES

- HDR support (10-bit, 12-bit)- Wide color gamut- ICC profile preservation- EXIF metadata extraction- Animation frame selection

CAVEATS

Output format support depends on compile-time options. Large images may consume significant memory. HDR content may not display correctly in non-HDR-aware viewers.

HISTORY

avifdec was developed as part of libavif by Joe Drago and the Alliance for Open Media, released around 2019 to support the new AVIF format standardized by AOM.