Extron Electronics SME 100 User Guide - Manual (Page 171)

Available Multicast Streams
The SME 100 uses the IGMP multicast protocol to push or pull streams. The IGMP multicast
protocol provides increased bandwidth efficiency because the SME 100 will only send data
when a connection is made by the user. All network switches and routing equipment must
be properly configured to support IGMP snooping and IGMP query to avoid flooding all
endpoints with unnecessary streaming traffic.
The table below indicates the approximate number of multicast streams that are supported
by the SME 100 when using the IGMP multicast protocol. Operating at different resolutions
using higher or lower bit rates may increase or decrease the scalability of the streaming
system.
NOTE: For networks not configured to use the IGMP multicast protocol, consider
using a media server to deliver multiple unicast streams to control PCs and viewing
devices (see the separate publication "
Streaming to Wowza Media Server 3 " at
www.extron.com ).
Multicast
Resolution
(Pixels x Lines)
Recommended
Video Bit Rate
(Kbps)
Approximate Number of Multicast
Streams
Push Pull
480 x 360 2700 No Limit 75 to 85
720 x 486 3600 No Limit 74 to 85
1024 x 768 4500 No Limit 57 to 65
1280 x 720 5500 No Limit 45 to 64
1920 x 1080 7500 No Limit 12 to 48
NOTES:
The number of available pull streams is dependent on bandwidth and
content (high motion or static content).
The following configuration options were set on the SME 100:
• Stream Type = CBR
• GOP Length = 30
• Stream Mode = Video/Audio
• Pull Streaming Method = Multicast UDP
• Push Streaming Method = Multicast UDP or RTP
If more streams are required, setting up a media server is the next step in expanding the
streaming architecture. A media server provides a scalable live streaming media solution.
For information on setting up a media server, see "
Streaming to Wowza Media Server 3 "
available on the Extron website at www.extron.com .
SME 100 • Reference Information 165