IMO I say cut your losses. If you have Corrupt footage then I question your cards integrity. My question is this How important is it for you to get that data. if its on the high priority then send it to a data recovery specialist. Data recovery is complicated and can be expensive and should only be used as a last resort. there are soft where out there but you could be fussing for hours on end. I have a scan disk and I never once had a problem in over a decade with the recording media.