Ask HN: Open Source Video Ingestion

I'm working on a project that needs to consume and present video from IP-based cameras in the field. The cameras are owned by the customer, and need to be ingested and saved to disk for replay later, or for long term archival.

We're currently looking at a number of COTS packages for this, including Milestone and IPConfigure, as I can't find any open source alternatives.

Does anyone know of anything I could use that would allow for me to set up a camera, ingest its feed and save to disk for replay / archival, and (ideally) allow for supplementary metadata to be saved alongside the video (like camera ID, location, perhaps a description field, etc.)?