DragonFly On-Line Manual Pages

IMG2WEBP(1)            DragonFly General Commands Manual           IMG2WEBP(1)

NAME
       img2webp - create animated WebP file from a sequence of input images.

SYNOPSIS
       img2webp [file_options] [[frame_options] frame_file]... [-o webp_file]
       img2webp argument_file_name

DESCRIPTION
       This manual page documents the img2webp command.

       img2webp compresses a sequence of images using the animated WebP
       format.  Input images can either be PNG, JPEG, TIFF or WebP.  If a
       single file name (not starting with the character '-') is supplied as
       the argument, the command line arguments are actually tokenized from
       this file.  This allows for easy scripting or using a large number of
       arguments.

FILE-LEVEL OPTIONS
       The file-level options are applied at the beginning of the compression
       process, before the input frames are read.

       -o string
              Specify the name of the output WebP file.

       -min_size
              Encode images to achieve smallest size. This disables key frame
              insertion and picks the parameters resulting in the smallest
              output for each frame. It uses lossless compression by default,
              but can be combined with -q, -m, -lossy or -mixed options.

       -kmin int

       -kmax int
              Specify the minimum and maximum distance between consecutive key
              frames (independently decodable frames) in the output animation.
              The tool will insert some key frames into the output animation
              as needed so that this criteria is satisfied.
              -mixed Mixed compression mode: optimize compression of the image
              by picking either lossy or lossless compression for each frame
              heuristically. This global option disables the local option
              -lossy and -lossless .

       -near_lossless int
              Specify the level of near-lossless image preprocessing. This
              option adjusts pixel values to help compressibility, but has
              minimal impact on the visual quality. It triggers lossless
              compression mode automatically. The range is 0 (maximum
              preprocessing) to 100 (no preprocessing, the default). The
              typical value is around 60. Note that lossy with -q 100 can at
              times yield better results.

       -sharp_yuv
              Use more accurate and sharper RGB->YUV conversion if needed.
              Note that this process is slower than the default 'fast'
              RGB->YUV conversion.

       -loop int
              Specifies the number of times the animation should loop. Using
              '0' means 'loop indefinitely'.

       -v     Be more verbose.

       -h, -help
              A short usage summary.

       -version
              Print the version numbers of the relevant libraries used.

PER-FRAME OPTIONS
       The per-frame options are applied for the images following as arguments
       in the command line. They can be modified any number of times preceding
       each particular input image.

       -d int Specify the image duration in milliseconds.

       -lossless, -lossy
              Compress the next image(s) using lossless or lossy compression
              mode. The default mode is lossless.

       -q float
              Specify the compression factor between 0 and 100. The default is
              75.

       -m int Specify the compression method to use. This parameter controls
              the trade off between encoding speed and the compressed file
              size and quality.  Possible values range from 0 to 6. Default
              value is 4.

EXAMPLE
       img2webp -loop 2 in0.png -lossy in1.jpg -d 80 in2.tiff -o out.webp

BUGS
       Please report all bugs to the issue tracker:
       https://bugs.chromium.org/p/webp
       Patches welcome! See this page to get started:
       https://www.webmproject.org/code/contribute/submitting-patches/

AUTHORS
       img2webp is a part of libwebp and was written by the WebP team.
       The latest source tree is available at
       https://chromium.googlesource.com/webm/libwebp

       This manual page was written by Pascal Massimino
       <pascal.massimino@gmail.com>, for the Debian project (and may be used
       by others).

SEE ALSO
       webpmux(1), gif2webp(1)
       Please refer to https://developers.google.com/speed/webp/ for
       additional information.

                                March 17, 2023                     IMG2WEBP(1)