I’ve just posted this message on another site in response to a similar question:
I’ve just been through a major nightmare of this nature and tried every piece of software I could find to open my corrupted 75gig HD file. I asked questions on all the boards and failed to find anyone or any service that could help me …
until …
I found a guy in Balcelona in Spain who specializes in rescuing corrupt Quicktime files. He claims to be the only guy in the world doing this.
He rescued a 90 minute HD file for me and his initial charge is $149.
For this he sends you a piece of software which takes a sample of your corrupt file. Then you email him this tiny slice. He examines it and, if he can help you, he adapts his software to your own particular problem.
He then emails you an application to fix your problem. If he fixes your problem and you are happy, you pay him by credit card or whatnot and he then emails you a code which does the final fix.
It’s almost unbelievable, I know. But it worked for me.
I had to have two passes done because of unforeseen difficulties, so it cost me $300. I was so grateful to him for fixing something which would have taken me days to replace and recut that I sent him an extra $100. So total $400.
I’m at home right now and not at my office. If you want his website and email and so on, reply to this email and I’ll post the information in the morning.
Best
Harry.