To stream from a Hetzner VPS to YouTube Live, give the VPS public internet connectivity, install FFmpeg for your operating system, create a YouTube live event, and send the event’s server URL and stream key from FFmpeg using YouTube’s recommended RTMPS endpoint. Choose video settings that match your source and the VPS’s tested capacity, then verify audio, motion, and stream health in YouTube Studio before relying on it.
This guide explains the setup and the decisions that matter. It does not prescribe a universal Hetzner server size or a copy-and-paste FFmpeg command: the right command depends on whether your input is a file, camera, capture device, or another stream, and the evidence available does not establish a suitable server plan for every workload.
What you need before starting
- A Hetzner Cloud server with a public route to the internet. Hetzner identifies a public Primary IP as the way to establish internet connectivity for a public-network server. A private-only server needs a separate routing arrangement. Hetzner Cloud server overview.
- Shell access to the VPS and an FFmpeg build that supports the input format and codecs you plan to use. Installation steps vary by operating system and FFmpeg build.
- A YouTube channel that can create or schedule a live event, with the event’s server URL and stream key.
- A defined video/audio source and an output target—resolution, frame rate, codecs, and bitrate—that the VPS can handle in real time.
Hetzner offers shared and dedicated CPU resource classes, but the available information does not identify a plan that is sufficient for every stream. Encoding load varies with the input, codec, resolution, frame rate, and encoder preset. Select a server based on the intended workload and validate it under that load rather than relying on a generic plan recommendation.
Set up the VPS network and firewall
The VPS sends media outbound to YouTube, so it needs working internet connectivity and enough sustained outbound capacity for the chosen bitrate. Hetzner’s Cloud API firewall documentation says that, when a firewall is attached, inbound traffic without a matching inbound rule is dropped, while outbound traffic is accepted when no outbound rule is set. Hetzner Cloud API: Firewalls.
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Check both layers: the Hetzner Cloud firewall and any firewall configured inside the guest operating system. Keep only the inbound administration access you need, and do not open inbound ports for a standard outbound YouTube ingest unless your particular input or management design requires them. Confirm that outbound traffic to the YouTube endpoint is permitted.
Create a YouTube Live event and protect its key
- Open YouTube Studio and go to the Live Control Room.
- Create or select the live event/stream you intend to use. Copy the server URL and stream key shown for that destination.
- Treat the key as a password. YouTube describes stream keys as “like your YouTube stream’s password and address.” Do not publish it, commit it to a public repository, or expose it in shared logs. If it is compromised, reset it in YouTube Studio and update the VPS configuration. YouTube Help: Create a live stream with an encoder.
Use the exact endpoint YouTube provides for the event. YouTube recommends RTMPS, the secure extension to RTMP, and documents an rtmps URL scheme using port 443. YouTube Help: Ingest settings for live streaming and YouTube Help: Stream using RTMPS.
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Choose FFmpeg settings that YouTube can ingest
YouTube’s current encoder guidance supports RTMP/RTMPS ingest, H.264, H.265/HEVC, and AV1 video, AAC or MP3 audio, constant-bitrate encoding, and frame rates up to 60 fps. Its recommended keyframe frequency is two seconds, with an interval no longer than four seconds. YouTube Help: Ingest settings for live streaming.
For a conservative compatibility starting point, use H.264 video with AAC audio; this is an example, not the only supported combination. Match the output frame size and frame rate to the source where practical. Do not choose a higher target merely because the encoder supports it: the VPS must encode the stream in real time, and its network connection must sustain the outgoing bitrate.
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YouTube’s listed H.264 bitrate recommendations
| Output | YouTube-recommended video bitrate |
|---|---|
| 720p at 30 fps | 6 Mbps |
| 1080p at 30 fps | 10 Mbps |
| 720p at 60 fps | 8 Mbps |
| 1080p at 60 fps | 17 Mbps |
These figures are YouTube’s recommended H.264 video bitrates, not a guarantee that a particular VPS can encode or upload reliably. For other resolutions and frame rates, use YouTube’s settings table rather than extrapolating. Leave headroom above the selected video bitrate for audio, transport overhead, and network variation, and check actual VPS performance. The published guidance also calls for constant bitrate and a two-second keyframe interval (not exceeding four seconds).
Build the FFmpeg output for your input
There is no single valid FFmpeg command for every stream: the input options differ for a media file, a capture device, or an existing network feed, and the exact encoder and option names depend on the FFmpeg build. Configure the command to read your chosen input, encode or copy compatible audio/video as appropriate, and send the output to the YouTube-provided endpoint and key in the format YouTube specifies. Do not publish a filled-in URL containing a real key.
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Before putting the command into a long-running service, run it interactively on the selected OS and FFmpeg version. Confirm that FFmpeg can open the input, encode at the intended real-time rate, and connect to the RTMPS endpoint. Keep secrets out of public scripts and logs; use an access-controlled secret/configuration method suitable for your host. The exact secret-file permissions and service configuration depend on your operating system and have not been established here.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Start the stream and validate it before an event
- Start the FFmpeg process with the selected input and YouTube event details.
- Return to YouTube Studio’s Live Control Room and wait for the incoming stream preview/status. Confirm the destination is the intended event.
- Check that both audio and moving video arrive, that the frame size and rate are as intended, and that YouTube reports healthy stream status.
- Run a pre-event test using audio and motion similar to the real program. Compare the selected outgoing bitrate with the VPS’s sustained outbound capacity and watch for dropped frames, buffering, or encoder overload.
YouTube recommends testing with representative audio and movement before going live; a still image with silence may not reveal issues that occur with the real input. YouTube Help: Troubleshoot live stream issues.
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Keep the process running—and know what is not automatic
A VPS process can exit because of an FFmpeg error, a host reboot, or an interruption in the input or network path. A supervisor or operating-system service can be configured to start a process at boot and restart it after failure, but that is separate from FFmpeg itself and must be tested with the chosen OS, command, and secret-handling approach. The available documentation here does not validate a particular systemd unit, restart policy, or FFmpeg reconnect flags, so do not assume a service will recover correctly without testing.
Also distinguish a restarted encoder process from a healthy YouTube event: after any interruption, verify the incoming stream and event status in Studio. If you change the key in YouTube, update the VPS configuration too.
Troubleshooting common failures
| Symptom | Likely checks and corrective action |
|---|---|
| FFmpeg cannot connect to YouTube | Check that the VPS has public internet connectivity, the provider and guest firewalls allow outbound traffic, and the endpoint and port match the event details. Prefer the YouTube-provided RTMPS URL. |
| YouTube does not receive the stream | Confirm that the server URL and stream key belong to the selected event and were copied accurately. If the key was exposed, reset it in Studio and replace it in the VPS configuration. |
| Video is choppy or the encoder falls behind | Check CPU load and real-time encoding performance. Reduce the output resolution, frame rate, or encoding workload if the VPS cannot keep up; assess whether a different CPU resource class is appropriate for the workload. |
| Stream health is poor or the connection buffers | Check sustained outbound capacity against the target bitrate, allow margin for audio and transport overhead, and inspect YouTube Studio’s stream-health status. Repeat the pre-event test with representative content. |
| Audio is missing or video is present without sound | Verify that the FFmpeg input maps the intended audio source and that the output uses a YouTube-supported audio codec such as AAC or MP3. Test with audible program material rather than silence. |
| The stream stops after a reboot or error | Check whether the FFmpeg process is running and review its local error output. Configure and test an appropriate supervisor or service for the chosen OS; a process restart alone does not confirm that YouTube has resumed receiving a healthy stream. |
Account for copyright and YouTube live-stream rules
Having a working encoder does not grant rights to the audio or video you transmit. Use material you own, have permission to use, or are otherwise legally entitled to stream, and review YouTube’s applicable copyright and live-stream policies for your channel and content. A technically healthy feed can still be restricted or interrupted by a rights or policy issue; check YouTube Studio for notices and status changes.
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