.\" Hey, EMACS: -*- nroff -*-

.TH VWEBP 1 "November 25, 2016"

.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.

.TP

.BI \-noalphadither

By default, quantized transparency planes are dithered during decompression,

to smooth the gradients. This flag will prevent this dithering.

.TP

.B \-mt

Use multi-threading for decoding, if possible.

.TP

.B \-info

Display image information on top of the decoded image.

.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

.SH KEYBOARD SHORTCUTS

.TP

.B 'c'

Toggle use of color profile.

.TP

.B 'i'

Overlay file information.

.TP

.B 'd'

Disable blending and disposal process, for debugging purposes.

.TP

.B 'q' / 'Q' / ESC

Quit.

.SH BUGS

Please report all bugs to the issue tracker:

https://bugs.chromium.org/p/webp

.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 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 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.