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Pearl-2 User Guide Start and stop an NDI stream
Pearl-2 supports both NDI and NDI|HX. You can use NDI on wired and wireless networks; however, NDI video
is bandwidth intensive. We recommend using high efficiency NDI|HX for wireless networks, which has H.264
compression to help lower bandwidth consumption.
Depending on the video content:
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A single 1920×1080@30 fps NDI stream needs about 125 Mbps of dedicated bandwidth
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A single 1920×1080@30 fps NDI|HX stream needs from 8 to 20 Mbps of dedicated bandwidth
After the NDI stream is started for the channel, the unicast NDI stream can be ingested by other NDI devices
on the network. You can start and stop the NDI stream using either the Admin panel, the touch screen, or
Epiphan Live, see
Start and stop streaming to a CDN .
For NDI to work properly, network ports 49152 to 65535 need to be open for two-way traffic.
Contact your network administrator for assistance.
Important considerations
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Pearl-2 can unicast up to two 1920×1080 @ 30 fps NDI streams simultaneously. However, NDI allows
receivers to request a lower quality stream. If that happens, Pearl-2 will send two streams: one at the
original resolution and a second one at the requested resolution. This can impact the CPU performance
of Pearl-2, see
Optimum CPU performance .
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We recommend having at least 125 Mbps Ethernet for a single 1920×1080 30 fps NDI stream, and
between 8 to 20 Mbps for a single 1920×1080 30 fps NDI|HX stream. Keep in mind that a Gigabit
Ethernet network will only have between 600 Mbps and 700 Mbps available for practical use. If
multiple NDI receivers connect to an NDI stream on Pearl-2, the bandwidth needed for each
NDI receiver adds to the total bandwidth consumption.
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After you start an NDI stream on Pearl-2, if NDI detects there are no receivers connected to the stream,
Pearl-2 stops broadcasting to conserve bandwidth and resources. However, the Pearl-2 stream can still
be discovered on the network.
Start and stop an NDI stream
NDI
®
(Network Device Interface) is used to transmit low-latency video content over Gigabit networks at
broadcast quality with no audio compression. Pearl-2 supports up to two unicast NDI output streams at
1920×1080@30 fps.
You can assign the NDI stream a unique name using alphanumeric characters. The name appears in
parenthesis after the Pearl-2 serial number and three-letter prefix as part of the NDI stream ID as seen by
other NDI resources on the network.
For example: PLTTSG999901 ( name )
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