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WGBH has created a very atomistic content model to support their rich media archives repository.
!WGBH Content Model Structure|thumbnail!
,width=32,height=32!Content types:
Concept
Video
Image
Document
Delivery
There are three basic approaches to delivering video files: progressive download, rtsp/rtmp streaming, and progressive download with HTTP range requests. Many media repositories are currently using Fedora redirect datastreams to reference content hosted on dedicated media servers (either locally, on a CDN, etc). The obvious advantages here are optimized delivery of media content and the ability to offload processing and storage to external processes. The biggest disadvantages are loss of integrated authn/authz from Fedora and additional effort for allowing Fedora to manage those assets.
One current limitation in Fedora is it uses the Java URL parsing library, which fails to recognize rtsp:// format URLs. This is further confounded by Quicktime's inability to follow HTTP redirects to rtsp:// streams. One possible work-around is to use the quicktime media link xml schema to redirect the Quicktime plugin appropriately. WGBH has developed this proof-of-concept.
Resources
Archives with significant media content
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