To make an FFmpeg stream reconnect after YouTube drops it, run FFmpeg under a retry loop or service manager that starts a fresh FFmpeg process when the publisher exits. Keep the YouTube Live Control Room server URL and stream key available to each restart. FFmpeg’s documented -reconnect options are for HTTP connections; they are not generic RTMP(S) output-retry controls.
Why FFmpeg does not automatically retry this publishing connection
FFmpeg’s protocol documentation describes options such as reconnect, reconnect_on_network_error and reconnect_delay_max in its HTTP protocol section. They can apply to HTTP inputs, but the documentation does not define them as general-purpose RTMP(S) output reconnection options. Adding those flags to an RTMP(S) publishing command is therefore not a reliable fix. Use an external supervisor to relaunch FFmpeg after a failed publishing process instead. FFmpeg Protocols Documentation
A relaunch creates a new publishing connection; it does not guarantee a seamless handoff or that YouTube will keep the same viewer-facing live event uninterrupted. If the source is a local cartoon file, the relaunched process may start the file from the beginning.
Set up the YouTube connection and cartoon input
- In YouTube Live Control Room, create or open the live stream and copy its exact server URL and stream key. Use the RTMPS ingest URL if your FFmpeg build and publishing setup support it. YouTube’s encoder guide explains where to obtain the server URL and key: Create a YouTube live stream with an encoder.
- Keep the stream key private. Do not publish it in a command example, shared script, or logs. For a persistent service, inject it securely rather than embedding it in a file that other users can read.
- Choose settings for the actual source and intended output. For a prerecorded local file,
-repaces reading in real time and-stream_loop -1loops the input indefinitely. Put both before-i. Do not use these file-specific options blindly with a live input. - Match the output codec, resolution, frame rate and bitrate to YouTube’s current encoder guidance and your upload capacity. YouTube recommends constant bitrate (CBR) and keyframes every 2 seconds, with a maximum interval of 4 seconds. Its current guide lists H.264 at 1080p30 with a recommended video bitrate of 10 Mbps; use the matching row for your actual resolution, frame rate and codec rather than treating that figure as universal. YouTube also lists stereo audio at 44.1 kHz and 128 kbps. These are YouTube Help recommendations accessed 2026-10-03; the page does not display a publication year. Choose live encoder settings, bitrates, and resolutions
For an RTMPS connection failure, verify that the URL is exact and that the encoder supports RTMPS. YouTube notes that specifying port 443 may help with an SSL error when the encoder supports it. RTMPS setup and troubleshooting are covered in Encrypt your stream using RTMPS.
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Restart FFmpeg after a failed publish
Illustrative shell retry loop
This shell example is a starting point, not a tested universal command. It assumes a local file, an FFmpeg build with the libx264 encoder, a compatible YouTube ingest configuration, and environment variables containing the server URL and key. The example uses 4500 kbps video and a 60-frame GOP only as sample values; select the bitrate from YouTube’s current table for the chosen output, and set the GOP to approximately two seconds at the actual frame rate.
#!/bin/sh
while :; do
ffmpeg -re -stream_loop -1 -i cartoon.mp4
-c:v libx264 -preset veryfast -b:v 4500k -maxrate 4500k -bufsize 9000k
-g 60 -keyint_min 60 -sc_threshold 0
-c:a aac -b:a 128k -f flv "$YOUTUBE_RTMPS_URL/$YOUTUBE_STREAM_KEY"
status=$?
[ "$status" -eq 0 ] && exit 0
sleep 5
doneReplace the sample file and settings with your actual source and output configuration. Confirm that the server URL and key form the expected destination for your YouTube stream. The loop waits five seconds after any nonzero FFmpeg exit, then starts a new process. It exits after a successful FFmpeg exit, which treats that exit as an intentional completion. If your broadcast should continue after a clean exit too, adjust the policy deliberately rather than restarting unconditionally.
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A fixed delay is simple but can retry too quickly during a persistent outage or configuration error. For a long-running channel, prefer a service manager configured to restart failures, apply increasing delays with a maximum, start at boot if needed, and distinguish intentional shutdown from failure. A shell loop is a simpler option for a one-off run, but it should handle signals and deliberate stops so shutdown does not trigger another launch.
Check whether the restart is addressing the real failure
Watch both the FFmpeg log and YouTube Live Control Room’s stream-health status. A supervisor can recover from some transient publishing interruptions by opening a new connection; it cannot correct a missing input file, invalid codec settings, a wrong or revoked key, a malformed URL, or a persistently unavailable network.
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- FFmpeg exits and does not reconnect: confirm that the supervisor is running, its restart policy covers the exit status, and it can read the command’s environment and input file.
- Repeated authentication or connection failure: recopy the exact server URL and current stream key from Live Control Room, check the RTMPS URL and encoder support, and avoid exposing the key while troubleshooting.
- The process runs but YouTube reports poor stream health: compare the actual output to YouTube’s bitrate, codec, resolution and frame-rate guidance. Test whether the upload path can sustain the selected bitrate; lower the output setting if the connection cannot reliably carry it.
- The cartoon restarts at the beginning: this is expected if the supervisor launches the same local-file command again with looping enabled. If episode continuity matters, use a workflow that tracks playback position; a basic process restart does not preserve it.
- Disconnects continue on unstable Wi-Fi: test a wired Ethernet connection. A different local network connection may help stability, but it does not add retry behavior to FFmpeg.
Test the full recovery path before the intended broadcast using representative motion and audio. Confirm that FFmpeg exits on a simulated interruption, the supervisor relaunches it, YouTube receives the new connection, and the chosen bitrate is sustainable.
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