Oracle Video server Manual page 40

Oracle Video Server (OVS)
RKF (Raw Key Frame) Container Formats The OVS can also deliver video files
in any container format meeting the raw keyframe criteria:
OVS supports delivering files in the RKF formats AVI (Audio Visual Interleave)
and WAV (Wavefore audio-only) to Oracle Video Client by converting them to OSF
(Oracle Streaming Format). OSF is an RKF format designed by Oracle Corporation
for efficient delivery of content that has not been optimized for streaming.
Tag Files The OVS creates and stores a tag file associated with each content file.
Tag files contain metadata, information the OVS needs to perform rate control
sucha as pausing and blind seeking and (on supported clients) visual fast forward
and rewind. If a client application requests a rate control operation on a content file,
the OVS reads the associated tag file to determine which parts of the content file to
deliver to the client.
When you use Oracle Video Server Manager (VSM) to load a content file into the
OVS, VSM automatically creates a tag file for the content file. The OVS also
provides utilities to:
The OVS also provides a utility to register existing tag files.
To support rate control for tag files in another compression format that meets the
full raw keyframe criteria, you must provide a tagging utility for the format.
VSM and the provided utilities also register the tag files in the table of contents of
the OVS and in an Oracle database in your OVS system (if you are using one).
One-Step Encoding Making content available on the OVS typically involves
obtaining a complete content file from an encoder, loading the file from tape, and
creating an associated tag file with a tagging utility. Some encoders can encode a
video content file and generate a tag file in real time (while the source video is
playing) through a process called one-step encoding. The OVS can accept and store
content from encoders in one step making new content available in real time.
2-4 Introducing Oracle Video Server
stateless — all the data for displaying the picture in a video frame is contained
entirely in that frame, rather than in any previous frames
contiguous — all the data for a frame is stored together in the video file and no
other data mixed with it
create tag files for MPEG content files
convert AVI and WAV files to OSF and create tag files for them
create empty tag files for playing video without rate control in formats other
than MPEG, OSF, and full raw keyframe formats