option "loglevel" l "set loglevel (0-6)" int typestr="level" default="4" no
option "filter" f "Specify filter.

May be given multiple times to 'pipe' the stream
through arbitrary many filters in an efficient
way.  The same filter may appear more than once,
order matters.

Filter options may be specified for each '-f'
option separately. Note that you will have to
quote these options like this:

	-f 'compress --anticlip --volume 2'
"
string typestr="filter_spec" no multiple

option "list_filters" L "print list of available filters and exit" flag off