Audio files: group normalising?

[tinpanalley]

I've got a storage drive full of videos I use for teaching children. I plug this into several different tablets, laptops, etc and they all have different quality speakers but what makes matters worse is that the videos themselves have different levels. Personally I'd never mess with the balance of my own films, programs etc but with little kids all that matters is if they can HEAR. They couldn't care less about dynamic range. So if I have one video that sounds loud enough, how do I get the other 40 or so on this drive normalised to that one's levels so that they all play at the same volume without having to ride the volume rocker all the time?

Thank you!!

 

[slashbinslashbash]

Try mp4gain

http://mp4gain.com/

I used its predecessor, mp3gain, many years ago to normalize my mp3 audio collection. It was actually a simple and lossless process for mp3 files. I imagine the same will apply to the sound within video files.

mp4gain is $40 USD but it seems reasonable if you have the need.