User guide

70 Chapter 6

Playlist Broadcaster

Version 3.1

Playlist files

All the MPEG-4 files that you hint and include in your playlist must be

ISMA-compliant and have exactly the same characteristics:

• contain one audio plus one video that have the same duration

• same video properties (video size, frames per second)

• same audio encoding parameters (frequency, stereo/mono).

NOTE You can put files encoded at different bit rate in your playlist only if the

sdp_reference_movie or the first movie in the list has the highest bit rate.

If they do not have the same characteristics, EnvivioTV

client will play

the first stream fine and will probably stop whenever the video size, the

number of streams, or any parameter is different in the next MPEG-4 file.

This is due to the fact that the SDP file is generated only with regard to

one MPEG-4 file (either the sdp_reference_movie or the first movie in the

list).

Command line mode

When you are using the Playlist Broadcaster in command line mode, if

you stop a broadcast and change the broadcast configuration file, be sure

to delete the SDP file before restarting the broadcast. Otherwise the

Playlist Broadcaster will not create a new SDP file, and your changes will

not take effect.