vwebp.1 (2824B)
1 .\" Hey, EMACS: -*- nroff -*- 2 .TH VWEBP 1 "July 18, 2024" 3 .SH NAME 4 vwebp \- decompress a WebP file and display it in a window 5 .SH SYNOPSIS 6 .B vwebp 7 .RI [ options ] " input_file.webp 8 .br 9 .SH DESCRIPTION 10 This manual page documents the 11 .B vwebp 12 command. 13 .PP 14 \fBvwebp\fP decompresses a WebP file and displays it in a window using OpenGL. 15 .SH OPTIONS 16 .TP 17 .B \-h 18 Print usage summary. 19 .TP 20 .B \-version 21 Print version number and exit. 22 .TP 23 .B \-noicc 24 Don't use the ICC profile if present. 25 .TP 26 .B \-nofancy 27 Don't use the fancy YUV420 upscaler. 28 .TP 29 .B \-nofilter 30 Disable in-loop filtering. 31 .TP 32 .BI \-dither " strength 33 Specify a dithering \fBstrength\fP between 0 and 100. Dithering is a 34 post-processing effect applied to chroma components in lossy compression. 35 It helps by smoothing gradients and avoiding banding artifacts. Default: 50. 36 .TP 37 .BI \-noalphadither 38 By default, quantized transparency planes are dithered during decompression, 39 to smooth the gradients. This flag will prevent this dithering. 40 .TP 41 .B \-usebgcolor 42 Fill transparent areas with the bitstream's own background color instead of 43 checkerboard only. Default is white for non-animated images. 44 .TP 45 .B \-mt 46 Use multi-threading for decoding, if possible. 47 .TP 48 .B \-info 49 Display image information on top of the decoded image. 50 .TP 51 .BI \-\- " string 52 Explicitly specify the input file. This option is useful if the input 53 file starts with an '\-' for instance. This option must appear \fBlast\fP. 54 Any other options afterward will be ignored. If the input file is "\-", 55 the data will be read from \fIstdin\fP instead of a file. 56 .TP 57 58 .SH KEYBOARD SHORTCUTS 59 .TP 60 .B 'c' 61 Toggle use of color profile. 62 .TP 63 .B 'b' 64 Toggle display of background color. 65 .TP 66 .B 'i' 67 Overlay file information. 68 .TP 69 .B 'd' 70 Disable blending and disposal process, for debugging purposes. 71 .TP 72 .B 'q' / 'Q' / ESC 73 Quit. 74 75 .SH EXIT STATUS 76 If there were no problems during execution, \fBvwebp\fP exits with the value of 77 the C constant \fBEXIT_SUCCESS\fP. This is usually zero. 78 .PP 79 If an error occurs, \fBvwebp\fP exits with the value of the C constant 80 \fBEXIT_FAILURE\fP. This is usually one. 81 82 .SH EXAMPLES 83 vwebp picture.webp 84 .br 85 vwebp picture.webp -mt -dither 0 86 .br 87 vwebp \-\- \-\-\-picture.webp 88 89 .SH AUTHORS 90 \fBvwebp\fP is a part of libwebp and was written by the WebP team. 91 .br 92 The latest source tree is available at 93 https://chromium.googlesource.com/webm/libwebp 94 .PP 95 This manual page was written for the Debian project (and may be used by others). 96 97 .SH REPORTING BUGS 98 Please report all bugs to the issue tracker: 99 https://issues.webmproject.org 100 .br 101 Patches welcome! See this page to get started: 102 https://www.webmproject.org/code/contribute/submitting\-patches/ 103 104 .SH SEE ALSO 105 .BR dwebp (1) 106 .br 107 Please refer to https://developers.google.com/speed/webp/ for additional 108 information.