split.py not idemptotent

[ldang]

One of the annoying things about trying to cut the videos incrementally is that I have to edit the resulting JSON file to remove videos and rooms I've already cut.

The upload.py script actually has some smarts and keeps track of my uploads using progress.json. So it won't upload talks I've already uploaded.

But the split.py seems to still try to download the room streams, even though they've already been processed. split.py makes a working directory for the room stream before it does its work. It should ideally skip over processing that room stream if the working directory already exists.

./split.py talks.json 
[youtube] Extracting URL: https://youtube.com/watch?v=PTSUj50N1Dw
[youtube] PTSUj50N1Dw: Downloading webpage
[youtube] PTSUj50N1Dw: Downloading ios player API JSON
[youtube] PTSUj50N1Dw: Downloading android player API JSON
ERROR: [youtube] PTSUj50N1Dw: Private video. Sign in if you've been granted access to this video
WARNING: Failed to download Room 105 Friday video PTSUj50N1Dw.