| .\" Hey, EMACS: -*- nroff -*- |
| .TH VWEBP 1 "November 17, 2021" |
| .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: |
| https://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 https://developers.google.com/speed/webp/ for additional |
| information. |
