Sony Vegas Pro 12 post webcam recording problem

[OnePerson]

(I used a Logitech Pro c920 Webcam and running windows 8) So after I fnish a recorded video in sony vegas for some reason when I try recording it for around 20 minutes it only shows for Print Length for 6 seconds but it clearly says that it recorded for 20 Minutes?

 

[OnePerson]

I would like to use Windows Live Movie Maker but when I finish recording there it turns into a blank screen and just shows no image(Using Movie Maker)

 

[kenrivers]

What format as the recordings being saved in?