I recently came across a problem on my editing program. First of all whenever I import a video from Pinnacle Studio 10, I do not render my videos from there. Once I capture my footage of whatever I then used Sony Vegas Pro 8 to start my editing. However, today I noticed that my videos wouldn't have audio, I checked my cables to see if that was the problem.
It wasn't. I played the videos in VLC player and I could hear music and sound. Though when I play it through Sony Vegas I don't get a noise and the audio bar is gone or doesn't appear when dragging the video down to the editing section.
Here are some pictures:
First these is my Dazzle DVC 170 settings: http://img176.imageshack.us/img176/8115/picture1q.jpg
Then here is what happens in Sony Vegas.