jkeesh / scpd-scraper

download and convert SCPD lectures easily
17 stars 17 forks source link

Discovery of previous quarter/past videos? #16

Open brianv0 opened 10 years ago

brianv0 commented 10 years ago

This isn't really an issue, per se, but I can't find a better place to maybe find some help on the subject.

Videos are apparently stored permanently in the IIS server. When a quarter is over, the links on the myquarter.aspx page are removed, and any reference to the movies is gone.

It seems older videos used to be stored predictively in the form of: mms://cobb.stanford.edu/courses/cs123/YYMMDD/YYMMDD-cs123-500.wmv

But now, courses are stored in the form:

mms://cobb.stanford.edu/courses/cs123/YYMMDD/YYMMDD-cs123-q3PIVrZxVqliR7zo0UgL-500.wmv

where q3PIVrZxVqliR7zo0UgL is some kind of hash/ID/something.

I don't believe that extra ID to be related to the actual file, because I have seen one case where the same code was applied to two distinct videos from two different classes of one course in the same week.

This is all very frustrating, because I was auditing a course (cs143, spring 13) and had to leave during the last few weeks, and wanted to grab lectures of what I missed after the fact, but I'm unable to discover the links to the videos for that course, even though I know them to exist (because I had links to earlier course videos).

So, it'd be nice if someone knows a way to discover those links, or possibly if someone generated an updated list of links for all courses. Stanford wouldn't probably be too keen on that, because you don't apparently need credentials for the mms stream, but anyway.