User guide

Streaming

Lecture Recorder x2 User Guide

9 Streaming

There are several decisions that need to be made when planning the creation of a

broadcast, besides its exact content of the broadcast. Will the broadcast include an

audio component coming from an analog audio source? What video format to use,

what video standard to use, how to stream the broadcast are all questions that have

to be answered when creating a broadcast. Most of the answers depend on the

intended audience of the broadcast, how are the viewers going to view the

broadcast, and how many simultaneous viewers are expected to view the

broadcast? Where are the viewers located in relation to the where the broadcast is

being streamed? What are the performance expectations? These are the types of

questions that will determine the overall design of the broadcast.

This chapter outlines how a suitable design of a broadcast can be architected based

on these types of questions and their resulting answers and how the System can be

used in this design.

The Lecture Recorder x2 supports streaming of various standards and formats. The

choice of video format will depend on the broadcast content and performance

requirements. For example, Motion JPEG does not support audio from an external

source. It also depends on how the intended viewers are planning to receive and

play the broadcast. Keep in mind that browser viewer capabilities and

compatibilities are subject to change.

With the Lecture Recorder x2, video codec for streaming is selected by an

administrator. After this action the system creates a list of available streaming

formats for this codec. The figure below is representation of the protocol stack

diagram showing how the video data is processed.