/usr/bin/webpmux

ERROR: Unknown option: '--help'.
Exiting due to command-line parsing error.
Usage: webpmux -get GET_OPTIONS INPUT -o OUTPUT
       webpmux -set SET_OPTIONS INPUT -o OUTPUT
       webpmux -duration DURATION_OPTIONS [-duration ...]
               INPUT -o OUTPUT
       webpmux -strip STRIP_OPTIONS INPUT -o OUTPUT
       webpmux -frame FRAME_OPTIONS [-frame...] [-loop LOOP_COUNT]
               [-bgcolor BACKGROUND_COLOR] -o OUTPUT
       webpmux -info INPUT
       webpmux [-h|-help]
       webpmux -version
       webpmux argument_file_name

GET_OPTIONS:
 Extract relevant data:
   icc       get ICC profile
   exif      get EXIF metadata
   xmp       get XMP metadata
   frame n   get nth frame

SET_OPTIONS:
 Set color profile/metadata/parameters:
   loop LOOP_COUNT            set the loop count
   bgcolor BACKGROUND_COLOR   set the animation background color
   icc  file.icc              set ICC profile
   exif file.exif             set EXIF metadata
   xmp  file.xmp              set XMP metadata
   where:    'file.icc' contains the ICC profile to be set,
             'file.exif' contains the EXIF metadata to be set
             'file.xmp' contains the XMP metadata to be set

DURATION_OPTIONS:
 Set duration of selected frames:
   duration            set duration for all frames
   duration,frame      set duration of a particular frame
   duration,start,end  set duration of frames in the
                        interval [start,end])
   where: 'duration' is the duration in milliseconds
          'start' is the start frame index
          'end' is the inclusive end frame index
           The special 'end' value '0' means: last frame.

STRIP_OPTIONS:
 Strip color profile/metadata:
   icc       strip ICC profile
   exif      strip EXIF metadata
   xmp       strip XMP metadata

FRAME_OPTIONS(i):
 Create animation:
   file_i +di[+xi+yi[+mi[bi]]]
   where:    'file_i' is the i'th animation frame (WebP format),
             'di' is the pause duration before next frame,
             'xi','yi' specify the image offset for this frame,
             'mi' is the dispose method for this frame (0 or 1),
             'bi' is the blending method for this frame (+b or -b)

LOOP_COUNT:
 Number of times to repeat the animation.
 Valid range is 0 to 65535 [Default: 0 (infinite)].

BACKGROUND_COLOR:
 Background color of the canvas.
  A,R,G,B
  where:    'A', 'R', 'G' and 'B' are integers in the range 0 to 255 specifying
            the Alpha, Red, Green and Blue component values respectively
            [Default: 255,255,255,255]

INPUT & OUTPUT are in WebP format.

Note: The nature of EXIF, XMP and ICC data is not checked and is assumed to be
valid.

Note: if a single file name is passed as the argument, the arguments will be
tokenized from this file. The file name must not start with the character '-'.