There is 2 kinds of FEC involved: The EUMETCast TS has MPE packets with 188 Bytes. There is FEC on the DVB-S2 demodulator called LDPC.
MPE packets are tagged with PID and assembled per PID to UDP packets by the OS. Tellicast has it's own FEC on the IP (UDP) level. A "missed"
packet is some damaged UDP packet (CRC ERROR or whatever). If TelliCast's FEC can fix it it's called recovered and you will have no files lost.