avifenc
Encode images to AVIF (AV1 Image File Format)
TLDR
Convert a specific PNG image to AVIF
Encode with a specific speed (6=default, 0=slowest and 10=fastest)
SYNOPSIS
avifenc [options] input.png output.avif
PARAMETERS
--version
Prints the version information.-h, --help
Displays help information.-q
Set the quality level. Range: 0 (best) to 63 (worst). Default: 63.-s
Set the encoding speed. Range: 0 (slowest, best) to 10 (fastest, worst). Default: 6.--min
Minimum quantizer. (Similar range than -q)--max
Maximum quantizer. (Similar range than -q)--tiling
Force explicit tiling (e.g. 32x32).--tile-rows-log2
Set the tile rows log2. Range: 0 to 6. Default: determined automatically.--tile-cols-log2
Set the tile cols log2. Range: 0 to 6. Default: determined automatically.--yuv420
Encode in YUV 4:2:0 chroma subsampling. If the encoder lib supports it.--yuv422
Encode in YUV 4:2:2 chroma subsampling. If the encoder lib supports it.--yuv444
Encode in YUV 4:4:4 chroma subsampling. If the encoder lib supports it.--profile
AVIF profile. 0: Main, 1: High, 2: Professional. Default: 0.--cicp
Specify the color information in the format: color_primaries/transfer_characteristics/matrix_coefficients.--exif
Specify the Exif metadata file to include.--icc
Specify the ICC profile file to include.--alpha-quality
Set the quality level for the alpha channel. Range: 0 (best) to 63 (worst). Default: same as -q.--ignore-icc
Ignore the ICC profile of the input file.
DESCRIPTION
avifenc
is a command-line tool for encoding images into the AVIF (AV1 Image File Format). It takes a source image (typically PNG or JPEG) as input and produces an AVIF file as output. avifenc
leverages the AV1 video codec to achieve significantly better compression than JPEG, often with comparable or superior image quality. This tool provides options for controlling encoding speed, quality, and other parameters, allowing users to fine-tune the encoding process for their specific needs.
avifenc
is essential for creating modern, high-quality images for the web and other applications where file size is a critical concern. It facilitates the adoption of the AVIF image format, which offers significant bandwidth savings compared to older formats.
CAVEATS
The specific options and their behavior may vary slightly depending on the version of avifenc
and the underlying AV1 encoding library used.
PIXEL FORMAT SUPPORT
avifenc
typically supports a range of pixel formats, including RGB, RGBA, and YUV. The specific formats supported may depend on the version of the library and the capabilities of the underlying AV1 encoder.
ENCODING TRADE-OFFS
There's a trade-off between encoding speed and image quality. Slower encoding speeds generally result in better compression and higher image quality, while faster speeds may sacrifice some quality for the sake of speed.
HISTORY
avifenc
emerged as part of the broader effort to develop and promote the AVIF image format. The AVIF format was created by the Alliance for Open Media (AOMedia), an organization dedicated to developing open, royalty-free media codecs. The tool's development has been closely tied to the evolution of the AV1 video codec and the corresponding AVIF specification. It's been used to encode the image data into avif files for web and other applications.
SEE ALSO
avifdec(1)