I had a similar issue, multicasting a full mpeg2 stream from a haupauge PVR-250 over a 154MB ATM backbone. This would eventually cause the CPUs on the routers to peg at 100%. Transcoding like this --sout '#transcode{vcodec=mp4v,acodec=mp4a,ab=32,deinterlace,channels=2}:standard{access=udp{ttl=5}, mu...