Verbose save_labeled_video output.

[jtpelster]

The save_labeled_video output is rather verbose, and eats a lot of terminal lines.

Would it be a good idea to either add an option to suppress, condense (to overwriting the line) or keep the verbose output?

Here is the relevant code:

a potential solution for the overwriting option:

It seems that the gui progress bar only works in the gui application.