Setting up a backup stream helps you avoid having your broadcast cut off in case your primary stream fails.

How to use

You can enable the backup RTMP URL inside the stream detail page:

After enabling, you'll see changes in two sections:

  • Primary RTMP (the URL has been updated)

  • Backup RTMP (a new set of Backup RTMP and Streaming key)

You will need to have 2 separate encoders: one encoder linked to the Primary RTMP, the other one linked to the Backup RTMP. It is important to match both encoders' output settings to ensure a smooth experience (bitrates, frame rates, resolutions, etc.).

When you stream to the Backup stream, the status will change from Offline to Online. This means it's ready in case the Primary stream fails:

  • Note: For seamless switching please enable Adaptive bitrate transcoding in Video Settings


Backup RTMP is best for streaming to Castr embedded player and may not work correctly with some social media such as Facebook yet. Please test your stream before the live time if you want to use backup RTMP together with social media sites.

The Primary ingests need to be started first to make the failover work, if the primary ingest fails the stream will failover to the backup. For smooth stream switching please enable ABR.

The Backup RTMP feature is available for some selected subscription plans only. Please visit our pricing website for more information.

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