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

.TH VWEBP 1 "June 5, 2019"

.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 \-usebgcolor

Fill transparent areas with the bitstream's own background color instead of

checkerboard only. Default is white for non-animated images.

.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 'b'

Toggle display of background color.

.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.