I'm writing an application that can "watch" a TV channel, interpret the closed captioning, and record the channel content to disk. I've never done any sort of programmatic interaction with video or closed captioning, so even basic advice could prove helpful.
I'm flexible on the technologies and the content sources (e.g. DirecTV, slingbox, tuner card, etc.).
Does anyone know of any toolkits or libraries which could serve as a starting point?
I've personally never worked with "non-digit" content, but I'd start with looking into MythTV. It's an open source project for a DVR system.