let mut dmx_reg = RegisteredDemuxers::new();
nihav_register_all_demuxers(&mut dmx_reg);
let mut dec_reg = RegisteredDecoders::new();
let mut dmx_reg = RegisteredDemuxers::new();
nihav_register_all_demuxers(&mut dmx_reg);
let mut dec_reg = RegisteredDecoders::new();