Hey, Cant seem to wrap my head around this, seemingly easy, but cant put it all together. I am using Windows 7 to accomplish this. My requirement is to capture video+audio from a Blackmagic Decklink card which delivers 720p from a video source. This capture should be displayed (preview) and on demand I should be able to record (and stop recording) the same stream to a file. My initial though on how to solve this was having ffmpeg capture the video/audio from the Decklink card and create a network stream. I would have vlc player pick up the network stream and display that. Now I would have a second ffmpeg process started and record the same network stream to a file whenever it's needed. This is the command I used to setup the network stream : ffmpeg -f dshow -i video="Decklink Video Capture" -f dshow -i audio="Decklink Audio Capture" -r 60 -vcodec mpeg4 -q 20 -acodec libmp3lame -ab 128k -f mpegts udp://127.0.0.1:6666?pkt_size=188?buffer_size=65535 Using VLC I tried to open this network stream via the address : rtp:// 127.0.0.1:6666 But immediately I get the following error : SDP required: A description in SDP format is required to receive the RTP stream. Note that rtp:// URIs cannot work with dynamic RTP payload format (65). Following some posts I found on forums I tried to add > config.sdp after the command I create the network stream with, but the file never gets any input. My question, would this be a good way to handle the requirements I have? And if so, what should I do to create the correct SDP for the stream? Many thanks in advance. Best Regards, Bjorn.