This is pretty funny.
Are you saying you have a movie captured on a Sony camcorder (did you do this in a movie theater?) ? If that is the case, there shouldn't be any Macrovision on the signal coming from the camcorder and your problem is probably the media... try DVD+RW, you can always recover from any mistakes.
If the camcorder tape was captured by line inputs into the camcorder, it also should not contain Macrovision because Sony camcorder generally has Macrovision protection as well and would not have copied the signal, although there are always different sensitivity of different equipment to the Macrovision signal. In that case, you may want to try the LiteON firmware update that removes the Macrovision detection. You can't miss the postings, they are everywhere:
SMART hack programme v1.3b (http://ilohacker.tripod.com/)