Ubuntu Manpage: img2webp - create animated WebP file from a sequence of input images.

NAME

       img2webp - create animated WebP file from a sequence of input images.

SYNOPSIS

       img2webp [file_options] [[frame_options] frame_file]... [-o webp_file]
       img2webp argument_file_name

DESCRIPTION

       This manual page documents the img2webp command.

       img2webp compresses a sequence of images using the animated WebP format.  Input images can
       either be PNG, JPEG, TIFF or WebP.  If a single file name (not starting with the character
       '-')  is  supplied as the argument, the command line arguments are actually tokenized from
       this file.  This allows for easy scripting or using a large number of arguments.

FILE-LEVEL OPTIONS

The file-level options are applied at the beginning of the compression process, before the
input frames are read.

-o string
Specify the name of the output WebP file.

-min_size
Encode images to achieve smallest size. This disables key frame insertion and picks
the parameters resulting in the smallest output for each frame. It uses lossless
compression by default, but can be combined with -q, -m, -lossy or -mixed options.

-kmin int

-kmax int
Specify the minimum and maximum distance between consecutive key frames
(independently decodable frames) in the output animation. The tool will insert some
key frames into the output animation as needed so that this criteria is satisfied.
-mixed Mixed compression mode: optimize compression of the image by picking either
lossy or lossless compression for each frame heuristically. This global option
disables the local option -lossy and -lossless .

-near_lossless int
Specify the level of near-lossless image preprocessing. This option adjusts pixel
values to help compressibility, but has minimal impact on the visual quality. It
triggers lossless compression mode automatically. The range is 0 (maximum
preprocessing) to 100 (no preprocessing, the default). The typical value is around
60. Note that lossy with -q 100 can at times yield better results.

-sharp_yuv
Use more accurate and sharper RGB->YUV conversion if needed. Note that this process
is slower than the default 'fast' RGB->YUV conversion.

-loop int
Specifies the number of times the animation should loop. Using '0' means 'loop
indefinitely'.

-v Be more verbose.

-h, -help
A short usage summary.

-version
Print the version numbers of the relevant libraries used.

PER-FRAME OPTIONS

       The  per-frame  options  are  applied for the images following as arguments in the command
       line. They can be modified any number of times preceding each particular input image.

       -d int Specify the image duration in milliseconds.

       -lossless, -lossy
              Compress the next image(s) using lossless or lossy compression  mode.  The  default
              mode is lossless.

       -q float
              Specify the compression factor between 0 and 100. The default is 75.

       -m int Specify  the  compression  method  to  use.  This  parameter controls the trade off
              between encoding speed and the compressed file size and quality.   Possible  values
              range from 0 to 6. Default value is 4.

EXAMPLE

       img2webp -loop 2 in0.png -lossy in1.jpg -d 80 in2.tiff -o out.webp

BUGS

       Please report all bugs to the issue tracker: https://bugs.chromium.org/p/webp
       Patches        welcome!        See       this       page       to       get       started:
       https://www.webmproject.org/code/contribute/submitting-patches/

AUTHORS

       img2webp is a part of libwebp and was written by the WebP team.
       The latest source tree is available at https://chromium.googlesource.com/webm/libwebp

       This manual page was written by Pascal  Massimino  <pascal.massimino@gmail.com>,  for  the
       Debian project (and may be used by others).