Dear friends,
I have around 50 intructional clips as AVI files on my Win XP Pro SP3 machine.

All of the clips start with a "jingle"/"intro" (sorry not sure of the proper English name) of 45 seconds.

I would like to get rid of this repetitive intro from all 50 files and save a copy of the clips without them.

Is there a way to do this batch ?

Do not own any commercial video editing SW so if there is some OS or otherwise free solution I would prefer.

Thanks a ton.

Bob