The RIST output can be push streams or have them pulled to/from a RIST-enabled device. RIST seeks to provide reliable, high performance media transport by using UDP at the transport layer to avoid the inefficiencies of TCP, then layering on top Forward Error Correction and Retransmits to add the reliability inherently absent from UDP.
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Contact your Zixi representative to learn more about interoperability testing between Zixi Broadcaster ZEC and 3rd party devices. More details about RIST can be found at www.rist.tv
To Create a RIST Output:
- In the Zixi Broadcaster ZEC Outputs page, click
. The New output window is displayed.
- Select the RIST option (radio button).
- Type in the unique identifier for this output in the Output Name.
- Select an Input Stream to be made available on this output from the drop-down list.
- Select the Show in Matrix check box to display this stream in the Matrix (see ZEC Using the Matrix). Default: Selected.
- Specify the Output parameters (see Output Stream Parameters Table).
- Click OK.
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| Parameter | Description | ||
|---|---|---|---|
| Output Parameters | |||
| Profile | Select one of the following RIST profiles that matches the input stream:
| ||
| Type (Main Profile) | Select the stream direction:
| ||
| Host | Specify the destination IP address or URL of the host to which the steam will be pushed. | ||
| Port | Specify the target UDP port. | ||
TTL | Specify the time-to-live (TTL). Used mainly to limit the range (or “scope”) of a multicast transmission. Leaving it as blank uses the default value specified by the operating system. | ||
Smoothing [mms] | Enables transmission of the output at the correct rate. Required when the receiving device is sensitive and can’t lock on to the stream (in such a case, the recommended latency is 100 - 1000 ms). | ||
| SMPTE-2022 FEC | In the SMPTE-2022 FEC standard, 1-D and 2-D parity codes are systematic FEC codes of decent complexity that provide protection against bursty or random losses.
To enable SMPTE-2022 FEC (Forward Error Correction) select one of the following parity options from the drop-down menu:
| ||
| Bind to IP | Select from the drop-down list the local IP address to be used for this Input, OR select Any to enable any IP to be used. | ||
Local Port | Specify from which local port to source the stream, if desired (instead of randomly chosen by the operating system). | ||
| ReMuxing | Select this checkbox to enable remuxing from VBR MPEG-TS to MPEG-TS CBR (used for professional IRDs). | ||
| Remux to bitrate [kbps]: | Specify the CBR bitrate to target for a remuxed stream. | ||
| Buffer Size [ms] | Specify the size of the buffer that will be used for the remixing. A larger buffer increases the quality, but also increases latency. | ||
| No NULL Packets | Select this option to re-multiplex the stream to CBR but remove the NULL packets in order to maintain low bitrate. | ||
| Enable Decryption | Select this checkbox to decrypt an encrypted stream. | ||
Decryption type | If the stream has been encrypted, you can decrypt through the output by selecting this checkbox and specifying the type of ecryption that was used. Select Automatic to decrypt a stream that has been encrypted using Automatic encryption. Only if the stream has not been encrypted, select None (default). Important Notice: if the stream has been encrypted you must decrypt it in the output. | ||
| Decryption key | If the decryption type includes a key, enter the key to decrypt the stream during output. | ||
| Enable IFB/Talkback | Select this checkbox to enable IFB/Talkback for one-way communication from the director or assistant director to on-air talent or a remote location. Selecting the checkbox allows the decoder with a Zixi Receiver ZEC to send audio back to the encoder with a Zixi Feeder. This offers the ability to, for example, give audio feedback to the camera operator. | ||
| Port | The port that will be used to send the audio feedback. |
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