I'm having some trouble producing a livestream video because of the latency
between the sound and the video. The audio is coming at least 1 second before
the video. I presume maybe it's because it takes more time to process the video.

Is there any way I can delay the audio in order to fix this?

Before anyone asks, my system is a Intel Core 2 duo 6400 with 2GB Ram. A
pinnacle 700-USB capture card and a an onboard sound from my intel motherboard
(SigmaTel Audio device).