Does not output new file names until program has finished.

My original code printed out the name of the file it was working on, as it opened. It did this using nested if statements for each codec. I recently changed over to searching through a dictionary of known codecs. That new method is cleaner and more efficient, but does not print out the current file name until after the entire operation has completed. This adds the requirement for a progress bar of some sort. Fixing this could remove the need for a progress bar, or at least suppliment one.