ASF-AVI-RM-WMV Repair allows you to repair video files that can't be played or fast-forwarded. The program supports AVI, DivX, XviD, RM, RMVB, ASF, WMV, AC3, and WMA files. It's easy to use--just select the files to be repaired and click the Repair button. Every fixed file will be saved as a new file, so you won't risk damaging your original.
Version 1.82 supports the repair of AC3 files.