In my video sequence, there is a one minute clip showing a close up of a letter - it is not close enough to easily capture the words on the letter so I am thinking to zoom in through FCP. Is it worth it? what's the work flow for this? It is in HD and how many can I zoom in without losing too much resolution?
Scaling up the existing video will also create pixellation and an overall blurriness.
Probably the better way is to get a scan of the letter in higher resolution and place it into the same frame relationship, using Apple Motion. Then do a virtual camera zoom in Motion, and Boom: the letter will be clean and readable.