2014-01-09 00:14:45 +01:00
|
|
|
.\" Hey, EMACS: -*- nroff -*-
|
2014-07-24 04:52:45 +02:00
|
|
|
.TH VWEBP 1 "July 23, 2014"
|
2014-01-09 00:14:45 +01:00
|
|
|
.SH NAME
|
|
|
|
|
vwebp \- decompress a WebP file and display it in a window
|
|
|
|
|
.SH SYNOPSIS
|
|
|
|
|
.B vwebp
|
|
|
|
|
.RI [ options ] " input_file.webp
|
|
|
|
|
.br
|
|
|
|
|
.SH DESCRIPTION
|
|
|
|
|
This manual page documents the
|
|
|
|
|
.B vwebp
|
|
|
|
|
command.
|
|
|
|
|
.PP
|
|
|
|
|
\fBvwebp\fP decompresses a WebP file and displays it in a window using OpenGL.
|
|
|
|
|
.SH OPTIONS
|
|
|
|
|
.TP
|
|
|
|
|
.B \-h
|
|
|
|
|
Print usage summary.
|
|
|
|
|
.TP
|
|
|
|
|
.B \-version
|
|
|
|
|
Print version number and exit.
|
|
|
|
|
.TP
|
|
|
|
|
.B \-noicc
|
|
|
|
|
Don't use the ICC profile if present.
|
|
|
|
|
.TP
|
|
|
|
|
.B \-nofancy
|
|
|
|
|
Don't use the fancy YUV420 upscaler.
|
|
|
|
|
.TP
|
|
|
|
|
.B \-nofilter
|
|
|
|
|
Disable in-loop filtering.
|
|
|
|
|
.TP
|
|
|
|
|
.BI \-dither " strength
|
|
|
|
|
Specify a dithering \fBstrength\fP between 0 and 100. Dithering is a
|
|
|
|
|
post-processing effect applied to chroma components in lossy compression.
|
|
|
|
|
It helps by smoothing gradients and avoiding banding artifacts. Default: 50.
|
2014-07-24 04:52:45 +02:00
|
|
|
.\" TODO(jzern): restore post-v0.4.1
|
|
|
|
|
.\" .TP
|
|
|
|
|
.\" .BI \-noalphadither
|
|
|
|
|
.\" By default, quantized transparency planes are dithered during decompression,
|
|
|
|
|
.\" to smooth the gradients. This flag will prevent this dithering.
|
2014-06-14 00:06:16 +02:00
|
|
|
.TP
|
2014-01-09 00:14:45 +01:00
|
|
|
.B \-mt
|
|
|
|
|
Use multi-threading for decoding, if possible.
|
|
|
|
|
.TP
|
|
|
|
|
.B \-info
|
|
|
|
|
Display image information on top of the decoded image.
|
2014-03-12 19:32:16 +01:00
|
|
|
.TP
|
|
|
|
|
.BI \-\- " string
|
|
|
|
|
Explicitly specify the input file. This option is useful if the input
|
|
|
|
|
file starts with an '\-' for instance. This option must appear \fBlast\fP.
|
|
|
|
|
Any other options afterward will be ignored. If the input file is "\-",
|
|
|
|
|
the data will be read from \fIstdin\fP instead of a file.
|
|
|
|
|
.TP
|
2014-01-09 00:14:45 +01:00
|
|
|
|
|
|
|
|
.SH KEYBOARD SHORTCUTS
|
|
|
|
|
.TP
|
|
|
|
|
.B 'c'
|
|
|
|
|
Toggle use of color profile.
|
|
|
|
|
.TP
|
|
|
|
|
.B 'i'
|
|
|
|
|
Overlay file information.
|
|
|
|
|
.TP
|
|
|
|
|
.B 'q' / 'Q' / ESC
|
|
|
|
|
Quit.
|
|
|
|
|
|
|
|
|
|
.SH BUGS
|
|
|
|
|
Please report all bugs to our issue tracker:
|
|
|
|
|
http://code.google.com/p/webp/issues
|
|
|
|
|
.br
|
|
|
|
|
Patches welcome! See this page to get started:
|
|
|
|
|
http://www.webmproject.org/code/contribute/submitting-patches/
|
|
|
|
|
|
|
|
|
|
.SH EXAMPLES
|
|
|
|
|
vwebp picture.webp
|
|
|
|
|
.br
|
|
|
|
|
vwebp picture.webp -mt -dither 0
|
|
|
|
|
.br
|
|
|
|
|
vwebp \-\- \-\-\-picture.webp
|
|
|
|
|
|
|
|
|
|
.SH AUTHORS
|
|
|
|
|
\fBvwebp\fP was written by the WebP team.
|
|
|
|
|
.br
|
|
|
|
|
The latest source tree is available at http://www.webmproject.org/code
|
|
|
|
|
.PP
|
|
|
|
|
This manual page was written for the Debian project (and may be used by others).
|
|
|
|
|
|
|
|
|
|
.SH SEE ALSO
|
|
|
|
|
.BR dwebp (1)
|
|
|
|
|
.br
|
|
|
|
|
Please refer to http://developers.google.com/speed/webp/ for additional
|
|
|
|
|
information.
|
