The Tool Desk
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What the setup does—and what it does not guarantee
Your media source goes into FFmpeg on the VPS. FFmpeg packages or encodes the audio and video and sends them to YouTube over RTMP or, preferably when supported, RTMPS. YouTube receives the feed; it does not run FFmpeg for you. You remain responsible for server configuration, the process, monitoring, and recovery.
Hetzner’s Cloud Server service agreement describes a commercially reasonable effort toward 99.9% monthly availability for an individual Cloud Server. That is an infrastructure availability measure, not a guarantee that FFmpeg, the connection to YouTube, or your live broadcast will stay up continuously. Hetzner Cloud and vServer service agreement
Choose the stream path before choosing a server
Stream-copy an already compatible file
If your media already has compatible video and audio codecs, frame rate, resolution, and bitrate, FFmpeg can often send the existing encoded streams without encoding them again. This is commonly called stream-copying. It avoids most of the CPU work of video encoding, but it cannot change the video’s resolution, frame rate, codec, or bitrate. Check that the actual file and YouTube’s current ingest settings are compatible before relying on this approach.
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Transcode when you need a different output
If you need to resize, change frame rate, change codec, or enforce a different bitrate, FFmpeg must encode the video in real time. This can use substantially more CPU than stream-copying. There is no universal Hetzner vCPU or RAM size that can be recommended for every source and command: test the actual file, output settings, and FFmpeg build on the server you intend to use.
Compare shared and dedicated CPU options by testing
Hetzner describes Cloud Server classes with shared and dedicated resources, with dedicated CPU resources presented for CPU-intensive workloads. That distinction can matter for real-time transcoding, but it does not establish a particular FFmpeg capacity. Test CPU use and whether frames are being processed fast enough with your own media and settings. Review current plans and public IP charges for the location and product you select. Hetzner Cloud server overview
Use YouTube’s current ingest settings
YouTube’s current encoder guidance recommends RTMPS, constant bitrate (CBR), and a two-second keyframe interval, with a four-second maximum. It says, “We recommend streaming to YouTube Live with RTMPS, a secure extension to the popular RTMP video protocol.” Follow the settings shown for your stream in Live Control Room if they differ from general guidance. YouTube: Choose live encoder settings, bitrates, and resolutions
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| H.264 output mode | YouTube minimum video bitrate | YouTube recommended video bitrate |
|---|---|---|
| 720p at 30 fps | 3 Mbps | 8 Mbps |
| 1080p at 30 fps | 5 Mbps | 14 Mbps |
These are the H.264 values in YouTube’s encoder settings, not the AV1 or H.265 figures on the same page. They describe video bitrate; audio and protocol overhead add to the traffic sent by your server. Match the output to the source and your intended quality rather than assuming a bitrate alone makes an incompatible source suitable.
Prepare YouTube and the Hetzner server
- Create or open the live stream. In YouTube Live Control Room, create the broadcast or open the one you will use. Obtain its current stream URL and stream key using YouTube’s encoder workflow. Keep the key private: it is a credential, so do not publish it in a script, log, screenshot, or shared shell history. If exposed, rotate it in YouTube and update the server configuration. YouTube: Stream live
- Provision a Cloud Server. Choose a supported operating system, server class, region, and public networking appropriate to your source and encoding workload. The server needs outbound connectivity to YouTube’s ingest endpoint. Confirm the current price, IP charges, and included traffic for the exact plan and location before creating it.
- Install FFmpeg and verify its build. Install FFmpeg using the method appropriate for your chosen operating system, then inspect the installed binary and its build configuration. Confirm that it includes the input demuxer, codecs, and RTMP-family output protocol needed for your source and command. FFmpeg options and protocol support can vary by version and build. FFmpeg protocol documentation
- Make credentials available without putting them in public output. Avoid embedding the stream key in a command that will be shared, saved in a broadly readable script, or captured in logs. Restrict access to the configuration and logs that contain sensitive values, and have a key-rotation procedure ready.
- Test the complete path. Start a representative stream and check the YouTube preview, audio, stream health, and messages in Live Control Room before treating the setup as deployed. Test the actual source, including the most demanding sections, and observe the server’s CPU and network use. YouTube recommends testing with representative audio and movement and monitoring stream health. YouTube: Live streaming tips
Build the FFmpeg input and output for your source
There is no single correct command for every input: a local looping file, a playlist, a live camera feed, a remote input, and a generated scene need different input handling. First confirm the source works locally on the VPS and decide whether its existing streams can be copied or need encoding. Then supply YouTube’s current ingest URL and key and configure the output to match the guidance for your broadcast.
For a file-based stream, arrange the input so it repeats as intended, and verify that audio and video continue across the loop boundary. A playlist needs its own sequencing and error behavior; do not assume that a looping-file option handles playlist transitions. For any source, verify the installed FFmpeg version’s supported options and output protocol in its documentation. Do not deploy a command merely because it starts: confirm that YouTube receives stable audio and video and that the Live Control Room reports a healthy stream.
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Estimate continuous outbound traffic
At 14 Mbps of H.264 video, the recommended 1080p30 video bitrate in YouTube’s settings, 30 days of uninterrupted output works out to about 4.54 TB decimal of video data: 14 megabits per second × 2,592,000 seconds ÷ 8. This is arithmetic, not a published Hetzner usage figure. Audio and protocol overhead make actual egress higher, and other outbound traffic from the server counts too.
Hetzner’s traffic page lists 20 TB of included traffic for EU CX, CPX, and CAX Cloud Servers, while listing different plan-dependent allowances for US and Singapore locations. Do not assume the EU figure applies to another location, product, or current plan; check the specific server’s allowance. Hetzner Cloud traffic documentation
Hetzner’s billing FAQ says outgoing traffic is billed and that traffic above the included amount is charged in 100 MB blocks; its 75% and 100% notifications are warnings, not automatic caps. Check the current terms and notifications for your account and plan before treating an allowance as a hard limit. Hetzner Cloud billing FAQ
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Keep the stream recoverable
Supervise FFmpeg as a service
Do not rely on an open shell session as the production plan. Run FFmpeg under an operating-system service supervisor or equivalent process manager, with deliberate restart behavior and logs you can inspect. A restart can recover from an FFmpeg exit, but it does not by itself prove that YouTube has resumed receiving a healthy stream.
Monitor the result, not just the process
Watch for a stopped process, missing output, connection errors, and unhealthy stream status in YouTube Live Control Room. Set up notifications that reach someone able to investigate, and test the alert and restart path. FFmpeg protocol reconnect options may help with some network failures, but their behavior depends on the protocol, command, and installed version; they are not a substitute for supervising the full process and verifying the broadcast.
Plan around maintenance and service boundaries
Even if your process is configured to restart, server maintenance, network problems, ingest-side interruptions, or a YouTube-side issue can stop or disrupt the broadcast. Keep a documented recovery procedure, including how to restart the service, check the preview, and rotate the stream key if it is compromised. The Hetzner availability effort is not an application-level continuity promise.
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Understand YouTube’s archive limit
YouTube states that streams under 12 hours are automatically archived. Do not assume that one uninterrupted 24/7 broadcast will produce a complete automatic archive. If you need a full record, arrange separate recording or segmentation and verify that the resulting files are complete. YouTube: Stream live
Common problems and fixes
- YouTube does not receive the stream: Recheck the current ingest URL and key in Live Control Room, the server’s outbound connectivity, and whether the FFmpeg build supports the selected RTMP-family protocol. Confirm that the key has not been revoked or rotated.
- The stream starts but YouTube reports poor health: Compare the actual output codec, bitrate, frame rate, and keyframe interval with the current encoder guidance. Check CPU saturation during transcoding and network upload capacity; test with representative motion and audio.
- FFmpeg exits or the stream stops after a network interruption: Inspect FFmpeg logs and service-supervisor logs, then test the restart and notification path. Do not assume a reconnect flag guarantees indefinite recovery.
- The VPS is overloaded: Determine whether the command is transcoding rather than copying. Measure the actual workload, simplify or change output settings if appropriate, and test a server class suited to the measured CPU demand.
- Traffic approaches the allowance: Recalculate using the actual video and audio bitrate, add overhead and other egress, then compare with the selected region and plan’s current terms. Do not rely on threshold emails to cap traffic automatically.
- The stream key appears in a log or shared file: Treat it as exposed. Rotate it in YouTube Live Control Room, replace the server-side secret, and check access permissions on configuration and log files.
Or let it run in the cloud
If you want a YouTube stream of uploaded video without administering a VPS, StreamNeo is a managed alternative: upload a recording or build a playlist, add your YouTube stream key once, and go live. It keeps looping from the cloud, so no computer or home connection has to stay on. Each slot streams your upload as made, up to 4K 60fps, at one flat price per slot; it can automatically recover if YouTube drops the stream. The first day is free with no card. Monthly pricing is $9.99 per month. StreamNeo plays uploaded videos to YouTube; it is not a camera-based live-production service. Start the free day with StreamNeo.
Frequently Asked Questions
Can FFmpeg stream-copy a file to YouTube without transcoding?
Yes, when the file’s encoded streams and output parameters are compatible with YouTube’s current ingest requirements; verify the actual media and stream health rather than assuming compatibility.
Will one 24/7 YouTube broadcast create a complete automatic archive?
No complete archive should be assumed: YouTube’s stated automatic-archive condition is for streams under 12 hours.
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