imagemagick usage

convert [options …] file [ [options …] file …] [options …] file Image Settings: -adjoin join images into a single multi-image file-affine matrix affine transform matrix-alpha option activate, deactivate, reset, or set the alpha channel-antialias remove pixel-aliasing-authenticate password – decipher image with this password-attenuate value lessen (or intensify) when adding noise to an image-background color …

ffmpeg usage

ffmpeg [options] [[infile options] -i infile]… {[outfile options] outfile}… Getting help: -h — print basic options -h long — print more options -h full — print all options (including all format and codec specific options, very long) Print help / information / capabilities: -L show license -h topic show help -? topic show help -help …