How can I change the capture source v4L tvcard to (composite)

What I am doing is bringing in my camera through a capture card on the pc.  I want to record the video live.  It is currently connected through the RCA jack on the card. 

The video comes in through composite using tvtime.  But I don't see any place to specify in kdenlive.

Thanks in advance for the help.  This program looks like the answer to my linux video recording and editing.

Well I still havn't been able to get a capture done.  I just used an adapter to plumb the RCA composite into the s-video port of the capture card.  But I am not getting audio?  It is set to /dev/dsp.  How can I change the audio capture source in kdenlive?  Any help to get me started would be much appreatiated.  Thanks