VBrick dme, Admin Manual

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138 © Vbrick Systems, Inc.
Stream on Demand
The DME’s
Stream on Demand
feature enables you to set up VOD or Live video streams only
when requested. This saves organizational bandwidth by not requiring networks to backhaul
video streams in the event they “may” be needed and only streams video sources when they
are actually requested.
This feature utilizes files, with the extension .vod, to contain the actual URI of the video
source.
That source can be either a live stream or a VOD file.
The
Stream on Demand
interface within the DME will allow the creation and management of
.vod files. It is important that the file names are unique across all DMEs, and the UI will
enforce unique file names by assigning GUIDs (globally unique IDs) when the file is created
and will also require an additional action to Rescan the folder within the UI. All of these files
are stored on the DME within the ftp root within the StreamOnDemand folder. Users can
add content via FTP, but should be aware of the restrictions on the file names (they must be
unique across DMEs).

To access the Stream on Demand files:
1. Navigate to
Output Configuration
>
Stream on Demand
.
Field Description
Hostname or IP
Address Hostname or IP address of the destination server. Each unique
source created may have multiple destinations.
Announced UDP Use when relaying a stream to another DME or server via auto
unicast.
• User Name – Name used for push authentication to destination
server.
• Password – Password used for push authentication to destination
server.
Unannounced UDP Use when pushing the stream to another DME or server and
publishing the associated .sdp file. Although this option can be used
for either multicast to clients and servers or unicast to a specific server,
the dominant case is multicast.
• Base Port – The base port will be incremented by 2 for each RTP
stream.In most common cases, there are two RTP streams (audio
and video) so 4 ports are required for the relay. The ports must be
unique on the destination device for unicast or on the multicast IP.
• Output SDP file – Auto-generates an .sdp file using the
Output
SDP file
name and including the destination information.
• Multicast TTL – For unicast, the number of hops (between
routers) for which an IP packet is valid in the network. For
multicast defines the distribution scope of the stream. Range =
1–255.
Add | Remove
Destination A relay can send the stream to multiple destinations. Use this button
to add or remove a configured destination.