Provided by: webp_0.6.1-2ubuntu0.18.04.2_amd64 
NAME
webpmux - create animated WebP files from non-animated WebP images, extract frames from animated WebP
images, and manage XMP/EXIF metadata and ICC profile.
SYNOPSIS
webpmux -get GET_OPTIONS INPUT -o OUTPUT
webpmux -set SET_OPTIONS INPUT -o OUTPUT
webpmux -strip STRIP_OPTIONS INPUT -o OUTPUT
webpmux -frame FRAME_OPTIONS [ -frame ... ] [ -loop LOOP_COUNT ]
[ -bgcolor BACKGROUND_COLOR ] -o OUTPUT
webpmux -duration DURATION OPTIONS [ -duration ... ] INPUT -o OUTPUT
webpmux -info INPUT
webpmux [-h|-help]
webpmux -version
DESCRIPTION
This manual page documents the webpmux command.
webpmux can be used to create/extract from animated WebP files, as well as to add/extract/strip XMP/EXIF
metadata and ICC profile.
OPTIONS
GET_OPTIONS (-get):
icc Get ICC profile.
exif Get EXIF metadata.
xmp Get XMP metadata.
frame n
Get nth frame from an animated image. (n = 0 has a special meaning: last frame).
SET_OPTIONS (-set)
icc file.icc
Set ICC profile.
Where: 'file.icc' contains the ICC profile to be set.
exif file.exif
Set EXIF metadata.
Where: 'file.exif' contains the EXIF metadata to be set.
xmp file.xmp
Set XMP metadata.
Where: 'file.xmp' contains the XMP metadata to be set.
STRIP_OPTIONS (-strip)
icc Strip ICC profile.
exif Strip EXIF metadata.
xmp Strip XMP metadata.
DURATION_OPTIONS (-duration)
Amend the duration of a specific interval of frames. This option is only effective on animated WebP and
has no effect on a single-frame file.
duration[,start[,end]]
Where:
duration is the duration for the interval in milliseconds (mandatory). Must be non-negative.
start is the starting frame index of the interval (optional).
end is the ending frame index (inclusive) of the interval (optional).
The three typical usages of this option are:
-duration d
set the duration to 'd' for the whole animation.
-duration d,f
set the duration of frame 'f' to 'd'.
-duration d,start,end
set the duration to 'd' for the whole [start,end] interval.
Note that the frames outside of the [start, end] interval will remain untouched.
The 'end' value '0' has the special meaning 'last frame of the animation'.
Reminder:
frame indexing starts at '1'.
FRAME_OPTIONS (-frame)
Create an animated WebP file from multiple (non-animated) WebP images.
file_i +di[+xi+yi[+mi[bi]]]
Where: 'file_i' is the i'th frame (WebP format), 'xi','yi' specify the image offset for this
frame, 'di' is the pause duration before next frame, 'mi' is the dispose method for this frame (0
for NONE or 1 for BACKGROUND) and 'bi' is the blending method for this frame (+b for BLEND or -b
for NO_BLEND). Argument 'bi' can be omitted and will default to +b (BLEND). Also, 'mi' can be
omitted if 'bi' is omitted and will default to 0 (NONE). Finally, if 'mi' and 'bi' are omitted
then 'xi' and 'yi' can be omitted and will default to +0+0.
-loop n
Loop the frames n number of times. 0 indicates the frames should loop forever. Valid range is 0
to 65535 [Default: 0 (infinite)].
-bgcolor A,R,G,B
Background color of the canvas.
where: 'A', 'R', 'G' and 'B' are integers in the range 0 to 255 specifying the Alpha, Red, Green
and Blue component values respectively [Default: 255,255,255,255].
INPUT
Input file in WebP format.
OUTPUT (-o)
Output file in WebP format.
Note:
The nature of EXIF, XMP and ICC data is not checked and is assumed to be valid.
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.webmproject.org/code/contribute/submitting-patches/
EXAMPLES
Add ICC profile:
webpmux -set icc image_profile.icc in.webp -o icc_container.webp
Extract ICC profile:
webpmux -get icc icc_container.webp -o image_profile.icc
Strip ICC profile:
webpmux -strip icc icc_container.webp -o without_icc.webp
Add XMP metadata:
webpmux -set xmp image_metadata.xmp in.webp -o xmp_container.webp
Extract XMP metadata:
webpmux -get xmp xmp_container.webp -o image_metadata.xmp
Strip XMP metadata:
webpmux -strip xmp xmp_container.webp -o without_xmp.webp
Add EXIF metadata:
webpmux -set exif image_metadata.exif in.webp -o exif_container.webp
Extract EXIF metadata:
webpmux -get exif exif_container.webp -o image_metadata.exif
Strip EXIF metadata:
webpmux -strip exif exif_container.webp -o without_exif.webp
Create an animated WebP file from 3 (non-animated) WebP images:
webpmux -frame 1.webp +100 -frame 2.webp +100+50+50
-frame 3.webp +100+50+50+1+b -loop 10 -bgcolor 255,255,255,255
-o anim_container.webp
Get the 2nd frame from an animated WebP file:
webpmux -get frame 2 anim_container.webp -o frame_2.webp
Using -get/-set/-strip with input file name starting with '-':
webpmux -set icc image_profile.icc -o icc_container.webp -- ---in.webp
webpmux -get icc -o image_profile.icc -- ---icc_container.webp
webpmux -strip icc -o without_icc.webp -- ---icc_container.webp
AUTHORS
webpmux 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 Vikas Arora <vikaas.arora@gmail.com>, for the Debian project (and may be
used by others).
SEE ALSO
cwebp(1), dwebp(1), gif2webp(1) Please refer to http://developers.google.com/speed/webp/ for additional information. November 10, 2016 WEBPMUX(1)