Typeerror When Using Moviepy

In trying to learn a little about MoviePy, I copied some sample code (which I modified slightly) that cuts a 10 second section out of a movie file, overlays text on it, and writes

Solution 1:

After searching around a bit more, I found a solution here. Line 122 of code in Readers.py was returning a float instead of an integer because it was using a single "/" instead of the double "//". I changed that line and it seems to have solved the problem. Details are at the link.

For the record, I still don't understand why it happened on certain files and not others. Nevertheless, the fix was simple.