That's a video file. Try a video editor like Premiere or Vegas.

Or if your DAW has an import video option, try it.

I was able to open a wmv file in Sound Forge 6, but it won't edit the video. I can alter audio but the video remains unaffected.

I use Vegas and I believe it limits out at around 8 hours? There are some other available programs known as splitter programs. This might be required to whittle down this numerically too huge file. An e-mail to Microsoft might be in order here? There are file size limitations on just about anything and everything. Unfortunately, just because it allows you to record something doesn't necessarily mean it will allow you to play it back. Certain programs will automatically roll over files to prevent reaching file size limitations. They are all seamlessly stitched back together again when viewing. I am sure we have some very good computer geekage Folks that can better direct you to this recovery process. Many of us have occasionally recorded beyond file size limitations & Not everything is always fully recoverable. In a situation like this, you first need to find out if the file plays at all? And if it does play? Can you skip towards the end? This might require that we rely on some Analog techniques for recovery purposes i.e. you play it back with its digital to analog decoding and all of its blatant artifacts and rerecord back in to a non-compressed file format creating your physical file chunks for each of the individual sections. This will mean some fairly enormous disk space will be necessary. The reason why you want to go to your uncompressed file format is so that you don't make the compression artifacts any worse than they have to be. This is not restoration but recovery.

I recovered
Mx. Remy Ann David

Try this:
[="http://www.virtuald…"]http://www.virtuald…

Its a free utility that does stuff like this. I've used it for years.

Make sure to use the Audio and Video menus to set things up for the output.

Then drag the timebar at the bottom to wherever you want. Use the HOME and END keys to mark a portion off, and then SAVE AS a video. Set new portions, and save as again until it is done.

Won't be the quickest thing in the world, but if you set up compression properly it will be very good quality.

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