Error! Unknown option '--help'
Usage:
 gif2webp [options] gif_file -o webp_file
Options:
  -h / -help ............. this help
  -lossy ................. encode image using lossy compression
  -mixed ................. for each frame in the image, pick lossy
                           or lossless compression heuristically
  -near_lossless <int> ... use near-lossless image preprocessing
                           (0..100=off), default=100
  -sharp_yuv ............. use sharper (and slower) RGB->YUV conversion
                           (lossy only)
  -q <float> ............. quality factor (0:small..100:big)
  -m <int> ............... compression method (0=fast, 6=slowest), default=4
  -min_size .............. minimize output size (default:off)
                           lossless compression by default; can be
                           combined with -q, -m, -lossy or -mixed
                           options
  -kmin <int> ............ min distance between key frames
  -kmax <int> ............ max distance between key frames
  -f <int> ............... filter strength (0=off..100)
  -metadata <string> ..... comma separated list of metadata to
                           copy from the input to the output if present
                           Valid values: all, none, icc, xmp (default)
  -loop_compatibility .... use compatibility mode for Chrome
                           version prior to M62 (inclusive)
  -mt .................... use multi-threading if available

  -version ............... print version number and exit
  -v ..................... verbose
  -quiet ................. don't print anything