Oracle Video server, Manual

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Components of Oracle Video Server and Oracle Media Net
2-30 Introducing Oracle Video Server
Video Pump
The video pump reads video files from the MDS and delivers them to the network
in real time. When a client requests video, the video pump receives a message from
the stream service, reads the appropriate portion of the file from the MDS, and
sends video data over the network through the appropriate downstream channel to
the client.
Real-Time Feed Service
The real-time feed service accepts this input from a one-step encoder:
■
encoded content
■
associated tag information
To support one-step encoding, the real-time feed service writes the encoded content
to one or more content files and the tag information to an associated tag file. The
stream service and video pump can then play the content.
To support a continuous real-time feed, the real-time feed service maintains a pool
of physical content files and writes the encoded content to one file after another.
The real-time feed service deletes the oldest files as they become out of date and
writes new ones. The real-time feed service also maintains a single tag file for all
physical content files in the pool.
Content Service
The content service maintains information that maps logical content to physical
content in the database.
When creating a tag file for a physical content file, the tagging utility calls the
content service to generate logical content based on the content file. As the
administrator, you can also call the content service to generate logical content titles
each representing a series of parts of physical content files.
A client application can query the content available in the OVS system through the
content service. On request of the client application, the content service reads from
the database and returns a list of logical content to the client.
The content service also receives requests from the stream service to resolve logical
content to physical tag files.