Aurora Media Workshop enables you to convert, join and extract audio from files. With the combination of DirectX and some of the speediest encoders available, you really won't find many applications that converts faster than Aurora Media Workshop.
The application Supports AVI to MPEG, AVI to WMV, AVI to DVD, MPEG to AVI, DivX, MPEG to WMV, VOB to MPEG, VOB to AVI, Div dat to MPEG and vice versa. It also supports specifying start and end position when you do conversion, join and audio extract. Clip film freely just needs several clicks.
You can also preview the movie before set start and end position. Simply click the preview windows to play/pause, or drag the slider button at the bottom of the preview window for faster preview and set position.