I need help to recover a swap file of a video capture from a Matrox Rainbow Runner G-Series (oldie but I'm still using it

I was recording a TV show and suddenly the power went off. When the PC rebooted I ended with a 1GB file that I can't load or work in any program I know of (tried Premiere, Virtualdub, VirtualdubMod, several players - ALS, VLC, Windows Media Player and a few others). Tried Winrar also
What I need to know is if there is a way to convert this file in a workable video. I'd really like to recover this file because I know there won't be a rerun of the show.
Any help is appreciated.
