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.\"                                      Hey, EMACS: -*- nroff -*-
.TH WEBPMUX 1 "July 18, 2024"
.SH 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.
.SH SYNOPSIS
.B webpmux \-get
.I GET_OPTIONS
.I INPUT
.B \-o
.I OUTPUT
.br
.B webpmux \-set
.I SET_OPTIONS
.I INPUT
.B \-o
.I OUTPUT
.br
.B webpmux \-strip
.I STRIP_OPTIONS
.I INPUT
.B \-o
.I OUTPUT
.br
.B webpmux \-frame
.I FRAME_OPTIONS
.B [ \-frame ... ] [ \-loop
.I LOOP_COUNT
.B ]
.br
.RS 8
.B [ \-bgcolor
.I BACKGROUND_COLOR
.B ] \-o
.I OUTPUT
.RE
.br
.B webpmux \-duration
.I DURATION OPTIONS
.B [ \-duration ... ]
.I INPUT
.B \-o
.I OUTPUT
.br
.B webpmux \-info
.I INPUT
.br
.B webpmux [\-h|\-help]
.br
.B webpmux \-version
.br
.B webpmux argument_file_name
.SH DESCRIPTION
This manual page documents the
.B webpmux
command.
.PP
\fBwebpmux\fP can be used to create/extract from animated WebP files, as well as
to add/extract/strip XMP/EXIF metadata and ICC profile.
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.
.SH OPTIONS
.SS GET_OPTIONS (\-get):
.TP
.B icc
Get ICC profile.
.TP
.B exif
Get EXIF metadata.
.TP
.B xmp
Get XMP metadata.
.TP
.BI frame " n
Get nth frame from an animated image. (n = 0 has a special meaning: last frame).

.SS SET_OPTIONS (\-set)
.TP
.BI loop " loop_count
Set loop count on an animated file.
.P
Where: 'loop_count' must be in range [0, 65535].
.TP
.BI bgcolor " A,R,G,B
Set the background color of the canvas on an animated file.
.P
where: 'A', 'R', 'G' and 'B' are integers in the range 0 to 255 specifying the
Alpha, Red, Green and Blue component values respectively.
.TP
.BI icc " file.icc
Set ICC profile.
.P
Where: 'file.icc' contains the ICC profile to be set.
.TP
.BI exif " file.exif
Set EXIF metadata.
.P
Where: 'file.exif' contains the EXIF metadata to be set.
.TP
.BI xmp " file.xmp
Set XMP metadata.
.P
Where: 'file.xmp' contains the XMP metadata to be set.

.SS STRIP_OPTIONS (\-strip)
.TP
.B icc
Strip ICC profile.
.TP
.B exif
Strip EXIF metadata.
.TP
.B xmp
Strip XMP metadata.

.SS 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.
.TP
.I duration[,start[,end]]
Where:
.br
.B duration
is the duration for the interval in milliseconds (mandatory).
Must be non-negative.
.br
.B start
is the starting frame index of the interval (optional).
.br
.B end
is the ending frame index (inclusive) of the interval (optional).
.TP
The three typical usages of this option are:
.br
.B -duration d
     set the duration to 'd' for the whole animation.
.br
.B -duration d,f
     set the duration of frame 'f' to 'd'.
.br
.B -duration d,start,end
     set the duration to 'd' for the whole [start,end] interval.
.TP
.P
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'.
.TP
.I Reminder:
frame indexing starts at '1'.
.br

.SS FRAME_OPTIONS (\-frame)
Create an animated WebP file from multiple (non\-animated) WebP images.
.TP
.I 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.
.TP
.BI \-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)].
.TP
.BI \-bgcolor " A,R,G,B
Background color of the canvas.
.br
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].

.SS INPUT
.TP
Input file in WebP format.

.SS OUTPUT (\-o)
.TP
Output file in WebP format.

.SS Note:
.TP
The nature of EXIF, XMP and ICC data is not checked and is assumed to be valid.

.SH EXIT STATUS
If there were no problems during execution, \fBwebpmux\fP exits with the value
of the C constant \fBEXIT_SUCCESS\fP. This is usually zero.
.PP
If an error occurs, \fBwebpmux\fP exits with the value of the C constant
\fBEXIT_FAILURE\fP. This is usually one.

.SH EXAMPLES
.P
Add ICC profile:
.br
webpmux \-set icc image_profile.icc in.webp \-o icc_container.webp
.P
Extract ICC profile:
.br
webpmux \-get icc icc_container.webp \-o image_profile.icc
.P
Strip ICC profile:
.br
webpmux \-strip icc icc_container.webp \-o without_icc.webp
.P
Add XMP metadata:
.br
webpmux \-set xmp image_metadata.xmp in.webp \-o xmp_container.webp
.P
Extract XMP metadata:
.br
webpmux \-get xmp xmp_container.webp \-o image_metadata.xmp
.P
Strip XMP metadata:
.br
webpmux \-strip xmp xmp_container.webp \-o without_xmp.webp
.P
Add EXIF metadata:
.br
webpmux \-set exif image_metadata.exif in.webp \-o exif_container.webp
.P
Extract EXIF metadata:
.br
webpmux \-get exif exif_container.webp \-o image_metadata.exif
.P
Strip EXIF metadata:
.br
webpmux \-strip exif exif_container.webp \-o without_exif.webp
.P
Create an animated WebP file from 3 (non\-animated) WebP images:
.br
webpmux \-frame 1.webp +100 \-frame 2.webp +100+50+50
.br
.RS 8
\-frame 3.webp +100+50+50+1+b \-loop 10 \-bgcolor 255,255,255,255
.br
\-o anim_container.webp
.RE
.P
Get the 2nd frame from an animated WebP file:
.br
webpmux \-get frame 2 anim_container.webp \-o frame_2.webp
.P
Using \-get/\-set/\-strip with input file name starting with '\-':
.br
webpmux \-set icc image_profile.icc \-o icc_container.webp \-\- \-\-\-in.webp
.br
webpmux \-get icc \-o image_profile.icc \-\- \-\-\-icc_container.webp
.br
webpmux \-strip icc \-o without_icc.webp \-\- \-\-\-icc_container.webp

.SH AUTHORS
\fBwebpmux\fP is a part of libwebp and was written by the WebP team.
.br
The latest source tree is available at
https://chromium.googlesource.com/webm/libwebp
.PP
This manual page was written by Vikas Arora <vikaas.arora@gmail.com>,
for the Debian project (and may be used by others).

.SH REPORTING BUGS
Please report all bugs to the issue tracker:
https://issues.webmproject.org
.br
Patches welcome! See this page to get started:
https://www.webmproject.org/code/contribute/submitting\-patches/

.SH SEE ALSO
.BR cwebp (1),
.BR dwebp (1),
.BR gif2webp (1)
.br
Please refer to https://developers.google.com/speed/webp/ for additional
information.

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