you should read vdub manual. but to make things short for u: 1. open your video file in vdub. 2. menu -> audio -> direct stream copy 3. menu -> video -> direct stream copy 4. press 'home' on the keyboard 5. move the slider at the bottom while control is pressed, then file tune with the next/prev keyframe icons at the bottom (the yellow key icons) untill you reach the target finish of the clip. 6. press 'end' on the keyboard 7. make sure you see the selected part of the clip in darker shade of grey. 8. file -> save as AVI -> select your NEW file name and press enter. it should be done within few mins. cheers avi ps. really, read the dirtual dub manuals next time.