On the need of converting to .avi in run_pipeline.py... #44

Hi,

I have gone through the implementation and when looking at run_pipeline.py, I just wanted to find out if there is any particular benefit of converting the input video file (most likely an mp4) to .avi? From my understanding, there isn't any part of the code that would not work if mp4 was directly used, but I presumed that this conversion from mp4 to avi would have some significance.

Thanks.