No, if the source address was wrong, then I wouldn't get the stream to the PC. Here is my vlc command line (no video): vlc udp://10.249.1.6@232.19.254.246:13246 At the same time here is output from tcpdump: 10:52:02.541726 IP 10.249.1.6.0 > 232.19.254.246.13246: UDP, length 1316 10:52:02.541826 IP 1...