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6-4 Sun MediaCenter Server Administrator’s Guide • December 1997
6.2 Video-File Attributes
A piece of video content is stored as a title on a Sun MediaCenter server. The ftp
video-file commands report or perform operations on titles. A title is identified by
the following attributes:
■ name of the title, which usually corresponds to the name of the movie or video
clip; for example, Bambi for the move “Bambi”. There is no default value for the
name attribute.
■ speed associated with the file. “Speed” refers to the speed and play direction of
the title’s bit stream as compared to normal-play speed, forward direction. A
value of 1000 indicates a file plays at normal play speed, in the forward direction.
A value of 4000 indicates the file plays at four times normal speed, forward
direction. A value of -3000 indicates the file plays three times normal speed, in
the reverse direction. The default value for the speed attribute is 1000.
■ type of the file, either data or index. A data file is usually a file containing an
MPEG bit stream. An index file is a file that identifies the splice points within a
bit stream. The Media Stream Manager (MSM) uses these splice points when
stopping and restarting a stream and when performing trick play. See the Sun
MediaCenter Server Programmer’s Guide for an explanation of trick play. The default
value for the type attribute is data.
■ rate at which the file containing the video bit stream was encoded. This is a
number in the range from 1500000 to 8000000 that specifies a number of bits per
second. The rate attribute applies only to data files, not index files. There is no
default for the rate attribute.
■ format is the format of the encoded bit stream. It can be one of:
■ MPEGTS, indicating an MPEG-2 Transport Stream.
■ MPEGPS, indicating an MPEG-2 Program Stream.
■ MPEG1SYS, indicating an MPEG-1 System Stream.
■ MPEGTCE, indicating an MPEG-2 encapsulation used by Thomson Consumer
Electronics.
There is no default for the format attribute.
The fully-qualified name of a title consists of all of the just-described attributes. For
example:
title=Bambi,format=MPEGPS,speed=1000,type=data,rate=3000000