Flash video expert on Linux

Find Linux COMMAND LINE solutions for the following: - Normalize sound on Flash video files (RMS normalization) - Add sound effects on existing sound tracks of Flash video files - Add text on video Peak normalization won't be enough. We'll need to normalize the average loudness to a certain RMS value (and compress the peaks when necessary). If you have hands-on experience in these things, and if you can tell us why one program would be better than another, this will be an easy way to earn around 50€ with just three lines of code. (If you are really good, you can ask for more) If you'll be able to share your experiences with different Flash video & web hosting companies, that will be a plus.