Padding for Series 2 goes wrong for some sources

[wmcbrine]

With certain video resolutions that don't fit the usual standards, pyTivo's padding calculations (for Series 2) go awry -- not just incorrect, but invalid values (like negative padding) can be produced. (One example source file where this happened had dimensions 720x496.)

[ghost]

Hello. I was running into this & came up with a temporary hack to "fix" it. Perhaps some of the info may be useful to you.

http://pytivo.sourceforge.net/forum/ffmpeg-negative-values-are-not-acceptable-error-hack-f-t2462.html

Thanks for your work on pytivo.