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8-3
User Guide for Cisco Show and Share 5.3.x
Chapter 8 Live Events
Concepts
About Digital Media Encoders
When you create a live event, you can designate a Cisco Digital Media Encoder (DME) to manage and
broadcast the event. This is a DME live event. For a non-DME live event, you can designate a streaming
server to broadcast the event. For more information about selecting the live event type, DME or
non-DME, contact your system administrator.
DME Live Events
In relation to Cisco Show and Share, DMEs are devices that convert video and audio to the special
formats that computers use. Encoders:
1. Take in the live signals or recorded data that represent video and audio.
2. Convert and compress the information.
3. Generate computer-playable media in the form of streams, files, or both.
The system administrator configures the encoders and encoding formats and profiles that you select
when creating a DME live event. Encoding formats are named collections of settings—presets—for the
encoders. Cisco Show and Share includes a selection of factory-defined encoding formats. The system
administrator can also create, change, rename, and delete encoding formats.
Each named encoding format specifies:
• A media output type, such as WMV.
• Dimensions, such as 400x300, that are suitable for a particular type of playback device.
• A bandwidth consumption rate that is optimized for the expected network capacity.
• The overall quality (bit rate, frame rate, and more).
DMEs support two basic modes of operation, called pull and push. The system administrator configures
a pull and/or push mode depending on how the streaming infrastructure is configured.
• In pull configurations, the streaming server pulls streams from the encoder. The encoder is passive.
• In push configurations, the encoder pushes streams to the streaming server. The encoder initiates.
Non-DME Live Events
You can create, manage, and broadcast live events without a Cisco DME in your network. In a non-DME
configuration, you can designate a streaming server to broadcast the event when you create the live event
draft.
About the Question-and-Answer Workflow
Live events in Cisco Show and Share can include options for viewers to submit written comments and
questions. When you use this feature, the workflow can involve several members of your
Cisco Show and Share community. This section describes the sequence of events.
1. You choose if the live event should support viewer questions and comments when you create the live
event draft.
2. During a live event, viewers write and send their messages and comments in real time, from the
Cisco Show and Share portal where they watch the live event.
3. The live event moderator—the person signed-in as the Live Event user—pre-screens incoming
questions and comments as they arrive. The moderator can:
• Move high-priority questions to the Presenter’s View tab.