img2webp - create animated WebP file from a sequence of input images.
img2webp [file_level_options] [files] [per_frame_options...] img2webp argument_file_name
IMG2WEBP(1) General Commands Manual IMG2WEBP(1)
NAME
img2webp - create animated WebP file from a sequence of input images.
SYNOPSIS
img2webp [file_level_options] [files] [per_frame_options...]
img2webp argument_file_name
DESCRIPTION
This manual page documents the img2webp command.
img2webp compresses a sequence of images using the animated WebP for-
mat. 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 argu-
ments.
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 .
-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: http://www.webmpro-
ject.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.google-
source.com/webm/libwebp
This manual page was written by Pascal Massimino <pascal.mas-
simino@gmail.com>, for the Debian project (and may be used by others).
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
+---------------+-----------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+-----------------------+
|Availability | image/library/libwebp |
+---------------+-----------------------+
|Stability | Pass-through volatile |
+---------------+-----------------------+
SEE ALSO
webpmux(1), gif2webp(1)
Please refer to http://developers.google.com/speed/webp/ for additional
information.
NOTES
Source code for open source software components in Oracle Solaris can
be found at https://www.oracle.com/downloads/opensource/solaris-source-
code-downloads.html.
This software was built from source available at
https://github.com/oracle/solaris-userland. The original community
source was downloaded from http://downloads.webmpro-
ject.org/releases/webp/libwebp-1.2.1.tar.gz.
Further information about this software can be found on the open source
community website at https://www.webmproject.org/.
May 1, 2020 IMG2WEBP(1)