jack_rec -V (return code: 1)
error
usage: jackrec -f filename [ -d second ] [ -b bitdepth ] [ -B bufsize ] port1 [ port2 ... ]
jack_rec --help (return code: 1)
usage: jackrec -f filename [ -d second ] [ -b bitdepth ] [ -B bufsize ] port1 [ port2 ... ]