args "--no-handle-help --no-handle-version --conf-parser" include(header.m4) include(loglevel.m4) option "filter" f #~~~~~~~~~~~~~~~~ "Specify filter." string typestr="filter_spec" optional multiple details=" May be given multiple times to 'pipe' the stream through arbitrary many filters (without copying the data). The same filter may appear more than once, order matters. Options for a particular filter may be specified for each given '--filter' option separately. You will have to quote these options like this: --filter 'compress --inertia 5 --damp 2' "