/usr/bin/tiff2rgba

/usr/bin/tiff2rgba: invalid option -- '-'
LIBTIFF, Version 4.7.2
Copyright (c) 1988-1996 Sam Leffler
Copyright (c) 1991-1996 Silicon Graphics, Inc.

Convert a TIFF image to RGBA color space

usage: tiff2rgba [options] input output
where options are:
 -c jpeg      JPEG encoding
 -c zip       Zip/Deflate encoding
 -c lzw       Lempel-Ziv & Welch encoding
 -c packbits  PackBits encoding
 -c none      no compression

 -r rows/strip
 -t rows/strip (same as -r)
 -b (progress by block rather than as a whole image)
 -n don't emit alpha component.
 -B use this value as the background when doing alpha compositing
 -8 write BigTIFF file instead of ClassicTIFF
 -M set the memory allocation limit in MiB. 0 to disable limit