* dvblast.c: Add options --system-charset and --dvb-charset for charset conversion via iconv. * dvblast.c: Add support for charset conversion of the network name. * demux.c: Add support for biTStream charset conversion. * demux.c: Add missing stream types for AAC audio. * en50221.c: Validate descriptors before accessing them. * en50221.c: Implement MMI string charset conversion.