Usage:
  vipsthumbnail [OPTION…] - thumbnail generator

Help Options:
  -h, --help                    Show help options

Application Options:
  -s, --size=SIZE               shrink to SIZE or to WIDTHxHEIGHT
  -o, --output=FORMAT           output to FORMAT
  --output-profile=PROFILE      export with PROFILE
  --input-profile=PROFILE       import untagged images with PROFILE
  -a, --linear                  process in linear space
  -m, --smartcrop=STRATEGY      shrink and crop to fill SIZE using STRATEGY
  -n, --intent=INTENT           ICC transform with INTENT
  --no-rotate                   don't auto-rotate
  -v, --version                 print version
  --vips-concurrency=N          evaluate with N concurrent threads
  --vips-max-coord              maximum coordinate
  --vips-progress               show progress feedback
  --vips-leak                   leak-check on exit
  --vips-profile                profile and dump timing on exit
  --vips-disc-threshold=N       images larger than N are decompressed to disc
  --vips-novector               disable vectorised versions of operations
  --vips-cache-max=N            cache at most N operations
  --vips-cache-max-memory=N     cache at most N bytes in memory
  --vips-cache-max-files=N      allow at most N open files
  --vips-cache-trace            trace operation cache
  --vips-cache-dump             dump operation cache on exit
  --vips-version                print libvips version
  --vips-config                 print libvips config
  --vips-pipe-read-limit        read at most this many bytes from a pipe