CompuServe Messages

Does anyone know how i could record the output of of variable hz cameras onto video tape, ie 120 hz camera 120 frames a sec- how is this normally recorded? is it done on film (no good for my purpose), i'm trying to do this for some non real time cheap motion capture. i.e we want to record a performance with markers, multiple camera's etc & then process this information from tape, if the video equipment to do this costs less than $3000 dollars it may be viable, otherwise it would be cheaper to do it realtime just spending the bucks on image processing dsp's. Thanks in advance for any help. james (NUB UK)