Mainlink is a server based DVB appliance for multiple encoding of audio-video signals. The Linux based system allows encoding of up to 8 SDI SD/HD signals in multi-format, up to the 4k standard. The system accepts all input formats and performs, if necessary, rescaling to a different format and for final encoding. The appliance is equipped with EIT and AIT inserter, furthermore the output stream can be delivered in ASI, IP Multicast / Unicast and RTMP and SRT in multisystem.