stream-failover-relay

Pass-through stream relay that remuxes without transcoding and automatically fails over to a fallback input (another live source and/or a local file) when the primary stream goes down.

stream-failover-relay is a tool when you want:

• Low CPU load, zero GPU load and zero quality loss (no transcoding).
• Low latency.
• Always-on output for downstream consumers.
• A clean automatic switch to a "standby" stream ("BRB", slate, countdown, etc.).

How it works

• Relays a stream from primary input → output without transcoding (packet copy / remux).
• Detects primary failure (disconnect, timeout, "no packets for N seconds", etc.).
• Switches to fallback: a backup live URL or a local media file.
• Returns to primary once it’s healthy again.

What it does not do

• No video/audio transcoding, scaling, overlays, filters, or bitrate adaptation. But if you need any of that, please create a ticket, I have other projects that do just that.

Quick start

stream-failover-relay \
    rtmp://my.server/live/main \
    /opt/brb.flv \
    rtmp://remote.server/live/out \

Here rtmp://my.server/live/main will be the primary source, /opt/brb.flv the BRB placeholder, and rtmp://remote.server/live/out the output destination.

Caveats

Both sources (primary and fallback) must have the same properties:

• Resolution.
• FPS.
• Codecs.
• Audio frame Rate.
• Audio channels.
• etc.

Install

Go to Releases and download the executable you need.

Build from the source

apt install -y libavcodec-dev libavdevice-dev libavfilter-dev libavformat-dev libavutil-dev
git clone https://github.com/xaionaro-go/stream-failover-relay
cd stream-failover-relay
go build ./cmd/stream-failover-relay