Make sure to select the IP Capture plug-in:
Press Device select
Select one of the IP Capture plug-ins
Press Setup and specify the host address and the port for receiving the stream.
If the incoming stream is MPEG2 Transport Stream, Press Stream Filtering:
Select the filtering type and proceed accordingly
Check Use IP Streaming to send the captured stream to the network.
Check No capturing to disable writing the stream to a file.
Press Manual Capture to start capturing.