y4mtopnm -V (return code: 1)
y4mtopnm: invalid option -- '-'
**ERROR: [y4mtopnm] For usage hints, use option '-h'. Please take a hint.
y4mtopnm -h (return code: 0)
usage: y4mtopnm [options]
Reads YUV4MPEG2 stream from stdin and produces RAW PPM, PGM
or PAM image(s) on stdout. Converts digital video Y'CbCr colorspace
to computer graphics R'G'B'.
options: (defaults specified in [])
-P produce PAM output instead of PPM/PGM
-D de-interleave fields into two PNM images
-f 'flatten' multiplane frames/fields in raw composite grayscale images
(for stream debugging, see manpage for details)
-v n verbosity (0,1,2) [1]
-h print this help message