DragonFly On-Line Manual Pages
IMG2WEBP(1) DragonFly General Commands Manual IMG2WEBP(1)
img2webp - create animated WebP file from a sequence of input images.
img2webp [file_level_options] [files] [per_frame_options...]
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 argument are actually tokenized from
this file. This allows for easy scripting or using large number of
The file-level options are applied at the beginning of the compression
process, before the input frames are read.
Specify the name of the output WebP file.
Encode images to achieve smallest size. This disables key frame
insertion and picks the parameters resulting in smallest output
for each frame. It uses lossless compression by default, but can
be combined with -q, -m, -lossy or -mixed options.
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 .
Specifies the number of times the animation should loop. Using
'0' means 'loop indefinitely'.
-v Be more verbose.
A short usage summary.
Print the version numbers of the relevant libraries used.
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.
Compress the next image(s) using lossless or lossy compression
mode. The default mode is lossless.
Specify the compression factor between 0 and 100. The default is
-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.
img2webp -loop 2 in0.png -lossy in1.jpg -d 80 in2.tiff -o out.webp
Please report all bugs to the issue tracker:
Patches welcome! See this page to get started:
img2webp is a part of libwebp and was written by the WebP team.
The latest source tree is available at
This manual page was written by Pascal Massimino
<email@example.com>, for the Debian project (and may be used
Please refer to http://developers.google.com/speed/webp/ for additional
April 3, 2018 IMG2WEBP(1)