Problem capturing game footage with Afterburner

[kissenger]

I can record footage using Afterburner, and I can play it back with VLC or MPC or whatevs, but I can't seem to get it to work in Windows Movie Maker or even Sony Vegas.

What's going wrong? I'm recording at 30 FPS, 85% quality, MPEG compression, full frame on a 7970 in Win7.

 

[kissenger]

Sorry yeah, I'm using .mjpg compression. Also I'm recording at 1440p so I suppose the bit rate is very high. Some of these files are >10GB and they only last a few minutes.