What should I check when an SRT connection does not start?
Confirm that one endpoint is Caller and the other is Listener, then compare the UDP port and encryption settings. Check the applicable firewall and change one setting at a time.
FAQ
Check the connection, then isolate one part of the signal path.
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Common
What information should I leave out of a support request?
Do not send passwords, SRT passphrases, API keys, private stream addresses, or unrelated personal information. Describe the mode, port, expected result, and visible status without including secrets.
SRT USB CAM
Why should I try the test signal before the camera source?
A known test source separates the SRT path from camera capture. If the test arrives, check the selected camera and audio device next.
How should I diagnose one PRO transmitter window in a multi-camera setup?
Check the device-to-window mapping first, then verify that window's destination, mode, port, and encryption settings without changing the working windows.
SRT Preview
The SRT connection is active, but why is video or audio missing?
Check that the incoming MPEG-TS contains supported H.264 video and AAC audio. Then inspect video and audio controls separately so a muted channel is not mistaken for a network failure.
What should I check before recording with PRO?
Choose the intended destination, confirm available storage, start with a short recording, and verify the resulting MPEG-TS file before relying on a longer recording.
SRT TEST Signal
What does a successful generated test signal prove?
It confirms the tested receiver and network path with the selected settings. It does not prove that a separate camera or encoder is configured correctly.
SRT Redundancy Proxy
Why is one proxy output not forwarding?
Confirm that the input is active first. Then check only the affected output's mode, destination, port, encryption, firewall, and receiving endpoint.
How can I avoid conflicts between MULTI relay instances?
Give listeners on the same interface distinct UDP ports and maintain an explicit map between each instance, source, and destination.
SRT Probe
Which SRT Probe mode should I use?
Use Caller when connecting to a listening peer, Listener when waiting for a caller, and Rendezvous when both endpoints are configured for rendezvous. Match the mode and port at both ends before starting the test.
Why does an encrypted SRT Probe test fail?
Confirm that both endpoints use the same passphrase and AES key length, then check the selected mode, port, and firewall. Do not include the passphrase in a support request.
USB Camera AV Monitor
What should I check when USB Camera AV Monitor has no preview?
Reload devices, confirm the camera is available in Windows, and choose a resolution/FPS combination that supports the camera's NV12 input. Close other applications that may hold the camera.
How can I adjust audio timing in USB Camera AV Monitor?
Start monitoring, then adjust CH1 and CH2 delay independently up to 500 ms while comparing the audio output with the video preview. Stop before changing devices.