SRT Gateway by CEF Documentation
← Back to site

Using the Gateway · Chapter 9

Main features

These are the day-to-day functions: start the signal, define input and output, and watch the result.

1

Signal control

Four buttons govern the device:

  • Start — starts all streams.
  • Stop — stops all streams.
  • Restart — restarts the signals without rebooting the device.
  • Reboot — restarts the whole device.
Signal control buttons
Use this control area with caution — streams may be stopped.
2

Signal input

Here you define the source signal — SRT MPTS or HLS. Press Edit to type or change the SRT or HLS address. When the device receives the signal, «SRT input detected» appears in green.

You can also define a failover URL: if the primary one fails, the device switches to it. The «Swap» button exchanges primary and backup. The «Individual Sources» option is covered in chapter 10.

SRT / HLS input card
Signal input — press «Edit» to change the address (box).
3

UDP output

Configures the IP delivery address for UDP streams on your local network: the output address (multicast / unicast), the base port; you can also view the distribution network interface and adjust the bandwidth used for monitoring calculations. Press Save Configuration to save the changes.

UDP output card
UDP output — «Save Configuration» saves the changes (box).
4

Detected Programs

Shows the programs each active stream contains and lists them visually. Clicking changes what is shown in the preview monitor and the HDMI output (if available); if the program is not H.264 / AAC, it will not show on the HDMI output but it will on the Preview monitor. If the codec is not HDMI-compatible, a notice appears on the HDMI output indicating the codec is not supported.

Program marked for preview
The «PREVIEW» tag marks the program shown in the browser.
Program marked for HDMI
The «HDMI» tag marks the program sent to the screen.
5

Program Preview

The preview shows the live video inside the browser, with no external player needed. It is the quick way to confirm that a stream's program is active.

The preview area within the panel
The Program Preview area plays the live signal inside the panel for the program you select. It plays most video codecs commonly used in video streams. Select a program inside the block to start playback. If the Raspberry is a Pi 5, it will have HDMI output for streams with H.264 / AAC codecs.
Done

With this you can run the device day to day. Chapter 10 covers the advanced functions.

SRT Gateway by CEF · CEF Technology © 2026