How to amplify a movie soundtrack

Use AVS Video Converter

1. download and install the program
2. open a file or files (it can work in a batch mode)
3. click the Edit button
4. click Add... > Audio > Amplify
5. set for example 5 or more if necessary
6. close the edit window
7. select output format, for example DVD (AVS Video Converter has DVD burning engine)
8. click Convert Now
that's all
I think that AVS Video Converter is the best. It supports virtually all video formats and has built-in DVD, VCD burning engine.