How to use Virtualdub

Open the movie file, avi or mpg. Choose full-processing mode under video. Select compression. Always use one, preferably Divx. Install free codecs if not present. Choose direct stream copy under audio unless you want to change the audio compression. Use mp3 format, preferably. Save file as avi.
Use editing options and filters if necessary. To crop frame load brightness/contrast filter and crop as needed.
Virtualdub 1.7.7