Product guide

SRT TEST Signal

Send a generated moving test signal to verify an SRT receiver and network path.

Updated 2026-07-23 UTC

Editions

Compare editions

Paid editions include all features of the Free edition, plus the capabilities listed below.

Function	SRT TEST Signal	SRT TEST Signal MULTI
Generated Video Test Signal	○	○
Color Bars and Noise Patterns	○	○
Selectable Resolution and Frame Rate	○	○
SRT Caller and Listener Modes	○	○
SRT Encryption	○	○
AAC-LC Test Audio	○	○
MPEG-TS Recording	○	○
Live Statistics	○	○
OpenH264 Encoder	○	○
Multiple Instances (up to 16)	×	○

○ Included · × Not included

Current version: Version not verified for either edition.

Overview

Use this guide to check an SRT receiver or network path without preparing a camera feed.

Key features

Generate a live NV12 test image without a camera.
Select a Noise or Color Bars pattern.
Select 1920x1080 or 1280x720 at 30 or 60 FPS.
Preview the generated signal before and during transmission.
Encode the video as H.264, multiplex it into MPEG-TS, and send it to an SRT listener.
Display FPS, bitrate, TS packet count, reconnect count, and connection status.
Retry automatically when a receiver or network path is temporarily unavailable.
Run multiple application instances for multi-receiver and multi-channel tests.

Installation

Install the application from the Microsoft Store link below.
Prepare the receiving address, UDP port, SRT mode, and any encryption values.
Keep the receiver status visible while starting the test.

Basic configuration

Match the sending mode with the receiver's Caller or Listener mode.
Enter the receiver address and UDP port where required.
Configure matching encryption values when the path is encrypted.
Select and start the generated test source.

Settings

Setting	Purpose	Available values
Test pattern	Choose the generated video pattern.	Color Bars or Noise
Video format	Choose the generated resolution and frame rate.	1920x1080 or 1280x720 at 30 or 60 FPS
Receiver address	Set the SRT listener address.	IPv4 address
Receiver port	Set the SRT listener port.	Port number
SRT latency	Set the SRT latency.	Whole milliseconds
UI visibility	Show or hide the application controls.	Show or hide

Main operations

Watch the moving pattern at the receiver to distinguish a live signal from a frozen frame. Record the configured mode and port with the result so the test can be repeated.

Receiver examples

ffplay "srt://0.0.0.0:9000?mode=listener&latency=120"
ffmpeg -i "srt://0.0.0.0:9000?mode=listener&latency=120" -f null -

For a local test, use 127.0.0.1 as the receiver address and 9000 as the port.

Output format

Video: H.264
Container: MPEG-TS
Transport: SRT Caller
Test formats: 1920x1080 or 1280x720 at 30 or 60 FPS

System requirements

Windows 10 or Windows 11 x64
Network access to an SRT listener
An SRT-compatible receiver such as FFmpeg, FFplay, OBS, a hardware decoder, or a monitoring tool

Checks before use

Confirm that the receiving application supports the transmitted stream.
Check firewall and address translation rules on the UDP path.
Treat a successful test as a path check, not proof that every production source is configured correctly.

Troubleshooting

If the receiver remains idle, check mode, address, port, and encryption in that order. See the common connection FAQ.