--- title: Adding SRT Outputs slug: zixi-broadcaster-zec-current-version/adding-srt-outputs docTags: createdAt: 2024-12-26T15:04:57.579Z --- The SRT output can be pulled to/from an SRT-enabled device. SRT stands for ‘Secure Reliable Transport’ and is an open-source video transport protocol and technology stack. SRT uses secure streams and easy firewall traversal to optimize streaming performance and deliver high-quality video over even the most unreliable networks. :::hint{type="success"} Reference: Broadcaster versions and their associated SRT Library - Version 19 - SRT Library 1.5.5 - Version 18 - SRT Library 1.5.4 - Version 17 - SRT Library 1.5.3 - Version 16 - SRT Library 1.4.4 See the steps below to override the default SRT library with an older version for compatibility with a downstream system. ::: ## To Create an SRT Output: ::::WorkflowBlock :::WorkflowBlockItem In the Zixi Broadcaster **Outputs** page, click **+ New Output**. The **New output** window is displayed. ![](https://api.archbee.com/api/optimize/mzxtTQEvCNIdUNgF2kuwJ/nov_73-P9K5Foa6YYdI9n_bx19-srt-output3.png) ::: :::WorkflowBlockItem Select the **SRT **option (radio button). ::: :::WorkflowBlockItem Type in the unique identifier for this output in the **Output Name. **The Output stream Name must be unique. This Output name becomes the SRT stream ID when connecting an SRT Client to this Output. ::: :::WorkflowBlockItem Select an **Input Stream** to be made available on this output from the adjacent drop-down list. ::: :::WorkflowBlockItem Select the Show in Matrix check box to display this stream in the Matrix (see [Using the Matrix](docId\:bP6MO9f2QbxmU6gURKoG4)). Default: Selected. ::: :::WorkflowBlockItem Select the **Log this stream** checkbox if you would like to generate event logs for this output. ::: :::WorkflowBlockItem If you want to override the default version of the SRT library used for compatibility with downstream systems, select the desired version from from **SRT version** selector: ![](https://api.archbee.com/api/optimize/mzxtTQEvCNIdUNgF2kuwJ/539LzMaYVJA5g5SZKBIXl_bx19-srt-lib-selector.png) ::: :::WorkflowBlockItem Specify the **Output parameters** (see [Output Stream Parameters Table](docId\:hGA8gHAI5r3ulrIS1o9xd) below). ::: :::WorkflowBlockItem If you want the output stream to be **encrypted**, set a **Password**. The password value serves as a passphrase and is used to generate a hash of the password. The passphrase is not the AES key itself, but an input to a key derivation process that generates a 128, 192, or 256-bit key length. The AES key length is established by combining the sender’s and the receiver’s key lengths during handshake. See [Encrypting an SRT Output](docId\:egGxLhWbsHKLtZWPd8Amq) for more details. ::: :::WorkflowBlockItem Click **OK**. The new SRT Output with its settings is created and now appears on the screen. ::: :::: ### Output Stream Parameters Table | **Parameter** | **Description** | | ----------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | ***Output Parameters*** |
| | Listening Port | Specify the port to listen on. This port must be open on all firewalls between the Zixi Broadcaster and other devices it is communicating with. This port number can be used on multiple SRT outputs by entering the desired port.
| | Password (10-80) | If you want the output stream to be **encrypted**, set a **Password. **The value should be between 10 to 80 characters. The password value serves as a passphrase and is used to generate a hash of the password. The passphrase serves both authentication and encryption purposes. It is is not the AES key itself, but an input to a key derivation process that generates a 128, 192, or 256-bit key length. See [Encrypting an SRT Output](docId\:egGxLhWbsHKLtZWPd8Amq) for more details. | | Verify Stream ID | Enable this option to use a single port for multiple SRT outputs. The system will identify the stream by verifying its Stream ID. | | Latency (ms) | Specify a latency for the stream in milliseconds. To learn more about latency, see [Latency Considerations](docId\:b5ijrtxUIcWxU7rCmdHza). | | Encryption type | Select the encryption type that will be used. The final AES key length is established by combining the sender’s and the receiver’s key lengths during handshake. See [Encrypting an SRT Output](docId\:egGxLhWbsHKLtZWPd8Amq) for more details. | | Bind to IP | Select from the drop-down list the local IP address to be used for this output, OR select *Any *to enable any IP to be used. | | SRT version | Override the default version of the SRT library used for compatibility with downstream systems. | | **Billing Codes** | Billing codes are used to identify and differentiate traffic on a Zixi Broadcaster for billing purposes. When a billing code is added to a Source or Target, Zixi can track the traffic on that Broadcaster input or output separately from other inputs and outputs on the same Broadcaster. Billing codes are created by Zixi personnel on the Zixi Customer Portal for a particular organization. | | Billing Code | Enter the billing code that corresponds to this stream. The relevant billing can be obtained from the organization that received the billing code from Zixi. | | Billing password | Enter the password that corresponds to this billing code. | | ***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 encryption 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. | ## Advanced Mode The fields discussed below are optional and available only in **Advanced Mode**. To enter Advanced Mode add the URL parameter `?advanced=1` to the Zixi Broadcaster URL in your browser and press Enter/Return to reload the page: ::Image[]{src="https://api.archbee.com/api/optimize/amUtKWPrNQCS-26DKyGuI-5OBE4QsRN0icABdoD4ciK-20250421-173825.png" size="70" width="800" height="55" position="center" alt="Advanced Mode URL Param" darkWidth="800" darkHeight="55" showCaption="false"} :::hint{type="info"} Note the Advanced Mode settings are generally intended for advanced users and special cases. If you do not understand the settings, you should probably accept the default values. ::: ![](https://api.archbee.com/api/optimize/mzxtTQEvCNIdUNgF2kuwJ/zhQp3f8tXOHaEN8zvjLsM-20260608-101330.png) ### General - **Latency offset \[ms]** - Specify the additional buffering time in milliseconds. Increasing this value can improve stream stability in unstable network conditions, but will increase end-to-end delay. Default: 0 ms ### Enable IFB/Talkback - **Port** - Specify the port to listen on. This port must be open on all firewalls between the Zixi Broadcaster and other devices it is communicating with.