Also Try encoding ur Movie to .Avi using Virtual Dub and there it has the option of increasing Vloume of a Video
Here are the steps:
1. On the top menu bar, under "Audio", select "AVI Audio" and "Full Processing Mode".
2. If you're overlaying an audio track from somewhere else, you'll need to change the "AVI Audio" to "WAV Audio" and then select the input track.
3. After you've chosen "Full Processing Mode", you'll see the greyed-out "Volume" become available.
4. Click "Audio" then "Volume" and a smaller window will come up that says "Audio Volume".
5. Check the box that says "Adjust Volume of Audio Channels" then set the volume control slider. I find that 250% - 300% is needed for weak input audio tracks, although you get some hiss with that.
6. Click on "OK" and you're done.
Note:this will mean Converting the Entire movie into a .avi video file and with volume increased