Sun Microsystems 2.1 manual Video-File Attributes

6.2Video-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 -3000indicates 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

6-4Sun MediaCenter Server Administrator’s Guide • December 1997