File Duration too short!

[genesis72]

Whats up guys im new here. And i have a problem

I'm aware that u can use the fix flv feature on RMC4 but i used it on one of my recorded webcam shows. When i went to fix the duration it shortened the file's duration to 6 seconds when i know i recorded over 15 minutes of footage. Also the file size is 64 megabytes. How can a 6 second video be 64 megs.

Is there a way to increase the duration to the actual duration that i originally recorded the file with. Or am I SOL. Thanks.