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7.4 SMPTE ST 2110 Streaming (with Redundancy)

The SMPTE ST 2110 standard defines multicast streams with seamless redundancy. To create a redundant stream, the source node generates two identical streams on different multicast addresses. The receiving device accepts both streams, compares their quality, and uses the higher-quality one at any given moment. The transmitted signal is uncompressed, in accordance with SMPTE ST 2022-6.

MultiProbe supports creating SMPTE ST 2110 redundant streams for:

  • Video — mosaic output, compliant with SMPTE ST 2110-20.
  • Audio — from monitoring objects or audio players, compliant with SMPTE ST 2110-30.

Stream Management Screen

To open the SMPTE ST 2110 configuration, select the SMPTE ST 2110 stream type on the streams screen (Section 7.1).

Figure 225. SMPTE ST 2110 stream configuration screen Figure 225. SMPTE ST 2110 stream configuration screen

The configuration screen displays a list of streams with the following columns:

  • Type — Video or Audio.
  • Name — the user-defined stream name.
  • Source type — for video: a mosaic; for audio: a monitoring object or audio player.
  • Primary source IP — the network interface IP of the node broadcasting the primary stream.
  • Secondary source IP — the network interface IP of the node broadcasting the secondary (redundant) stream.
  • SDP URL — the URL for retrieving the SMPTE ST 2110 stream description in SDP format (Session Description Protocol, RFC 8866).

To edit a stream, select it from the list. To create a new stream, click the New stream button and select Video or Audio from the dropdown.

Video Stream Configuration (SMPTE ST 2110-20)

Figure 226. SMPTE ST 2110-20 video stream configuration window Figure 226. SMPTE ST 2110-20 video stream configuration window

The video stream configuration window contains the following fields:

  • Source — select the mosaic to use as the video source.
  • Name — the stream name. Can be entered manually or edited from the auto-suggested value.
  • Primary source IP — the network interface IP of the node for the primary stream.
  • Primary destination IP — the multicast group address for the primary stream.
  • Primary port — the multicast port for the primary stream.
  • Secondary source IP — the network interface IP of the node for the secondary stream.
  • Secondary destination IP — the multicast group address for the secondary stream.
  • Secondary port — the multicast port for the secondary stream.
  • Width — image width in pixels (included in the SDP).
  • Height — image height in pixels (included in the SDP).
  • Depth — sample bit depth for the image (included in the SDP): 8 or 10 bits.

Audio Stream Configuration (SMPTE ST 2110-30)

Figure 227. SMPTE ST 2110-30 audio stream configuration screen Figure 227. SMPTE ST 2110-30 audio stream configuration screen

The audio stream configuration window has two tabs for selecting the source type:

  • Monitoring objects — use a monitoring object as the audio source.
  • Audio players — use an audio player as the audio source.

Network address and naming fields are identical to those in the video stream configuration window. The following additional fields describe the audio signal in the SDP:

  • Depth — sample bit depth: 16 or 24 bits.
  • Packet time — the packet generation period for the SDP. Select from the available options or leave as Auto.