Tribblix: manual page: img2webp.1

IMG2WEBP(1) User Commands 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