To stream a prerecorded video from Ubuntu Server at 4K and 60 fps, inspect the file, configure FFmpeg to encode a real-time output that matches YouTube’s ingest requirements, and send it to the RTMPS destination and stream key shown in YouTube Live Control Room. For H.264 at 2160p60, YouTube’s current recommendation is 35 Mbps CBR with a two-second keyframe interval. FFmpeg’s -re option paces file input in real time; looping and unattended recovery need separate validation on your installed system.
What you need before starting
- An Ubuntu Server host with the video file available locally and enough sustained CPU or supported hardware-encoder capacity to produce 3840×2160 at 60 fps.
- An FFmpeg build that includes the encoder you intend to use. Availability depends on the build installed on your server.
- A YouTube channel with access to Live Control Room, where you can obtain the current RTMPS ingest destination and stream key.
- A stable upload connection able to sustain the encoder’s bitrate, with additional capacity for network variation. YouTube recommends testing the connection but does not specify a universal headroom multiplier.
A 4K output setting cannot add detail absent from the source. If the file is lower resolution, encoding it at 3840×2160 is upscaling, not native 4K.
Inspect the source file and FFmpeg build
Check the media properties
Use ffprobe or an equivalent media inspector to check the video dimensions, frame rate, codecs, and audio and video streams. Confirm the file actually contains the picture and frame rate you expect. A 60 fps output target requires the source and encoding process to support it; a lower-frame-rate source does not become true 60 fps footage simply by selecting a 60 fps output.
Confirm encoder availability and sustained performance
Check which encoders your installed FFmpeg build provides before choosing software or hardware encoding. Producing 4K60 is compute-intensive. The relevant choice depends on whether the encoder is available, whether it can sustain the workload, the image quality it delivers at the chosen bitrate, and the host’s power and thermal limits. No single encoder choice or Ubuntu package build is established as suitable for every server; test your own host before relying on it.
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Get YouTube’s ingest details
- Open YouTube Live Control Room and create or select the intended live stream.
- Copy the current RTMPS ingest destination and stream key provided there. Use the destination and key shown for your stream rather than assuming a fixed server address.
- Keep the stream key secret. Anyone who obtains it may be able to publish to your channel.
YouTube says, “We recommend streaming to YouTube Live with RTMPS, a secure extension to the popular RTMP video protocol.” Its current encoder guidance recommends H.264, H.265, or AV1; up to 60 fps; constant bitrate (CBR); and a two-second keyframe interval, not exceeding four seconds. For 4K streams, YouTube’s low-latency option is unavailable, so the stream uses normal latency. See YouTube’s encoder settings guidance.
Configure real-time pacing and the 4K60 output
For file input, FFmpeg documents -re as reading at the input’s native frame rate; it is equivalent to -readrate 1. This pacing is useful when output packet timing matters, including live streaming. Place input options such as -re before the corresponding -i option.
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Set the encoder’s output to match the intended format and YouTube’s current recommendations. For H.264 at 3840×2160 and 60 fps, use CBR at YouTube’s recommended 35 Mbps, with a two-second keyframe interval. Select an encoder available in your FFmpeg build and confirm it can sustain the workload. If you use H.265 or AV1 instead, YouTube lists a 10–40 Mbps range for those codecs; the H.264 recommendation should not be applied to them as though it were the same setting.
The official FFmpeg documentation available for this guidance does not establish the exact syntax for indefinite file looping. Verify the loop option and behavior against the documentation for your installed FFmpeg version; do not assume a loop command copied from another version will work as intended.
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Use the current official references for details that can change: YouTube encoder settings, FFmpeg documentation, and YouTube’s liveStreams API reference and RTMPS ingestion guidance.
Test the broadcast before leaving it running
- Start a test stream using the intended file, encoder, bitrate, frame rate, and RTMPS details.
- Check representative motion and audio rather than testing only a static frame or silent clip.
- In YouTube’s monitoring tools, verify the received resolution and frame rate and review stream-health messages.
- Confirm that the server sustains the encoding workload and the network sustains the outgoing bitrate throughout the test.
- Only rely on a longer broadcast after you have checked the behavior you need, including what happens when the process exits or the network drops.
YouTube recommends testing with representative movement and audio and monitoring stream health during the event. Its H.264 bitrate guidance is a recommendation, not proof that a particular server or network can deliver a stable stream.
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Plan for looping and unattended operation
Real-time pacing, repeating a file, and recovering from failures are separate problems. Validate the indefinite-loop configuration for your installed FFmpeg version. For unattended operation, separately design and test process supervision, restart behavior, logging, and handling of network interruptions. A command that sends one stream does not by itself guarantee automatic reconnects or continuous operation, and no particular Ubuntu service configuration is established here.
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- YouTube reports the wrong resolution or frame rate: Recheck the source properties, encoder output settings, and what YouTube actually receives. An output label alone does not establish that the source is native 4K60.
- The stream buffers or loses health: Check whether the server can sustain encoding and whether the upload connection can sustain the configured bitrate. Test under representative conditions; there is no universal upload headroom multiplier stated in YouTube’s guidance.
- The file plays too quickly or output timing is irregular: Confirm that
-reis placed before the corresponding input’s-i. It paces file reading in real time; it does not solve encoder overload or network instability. - The file does not repeat: Check the loop syntax and behavior against the documentation for the FFmpeg version installed on the server. The exact indefinite-loop command is version-specific and is not established here.
- The stream stops after a process or connection failure: Treat supervision and recovery as separate requirements. Test process restarts, network interruption handling, and logs rather than assuming FFmpeg or YouTube will restart the entire workflow automatically.
- The stream key is rejected or the wrong channel goes live: Re-copy the current key and destination from the correct Live Control Room stream, and keep the key private.
Or let it run in the cloud
If your aim is a continuous prerecorded YouTube stream without maintaining an Ubuntu server, StreamNeo offers a cloud-based alternative: upload your video or build a playlist, add your YouTube stream key once, and go live. The uploaded video loops from the cloud, so nothing has to stay on at home. It streams the upload as made, up to 4K 60fps, at one price per slot, and automatically recovers if YouTube drops the stream. The first day is free with no card required. Monthly pricing is $9.99 per month. StreamNeo is for prerecorded video streaming to YouTube, not camera broadcasts. Start the free day on StreamNeo.
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Copyright and YouTube policy checks
Before broadcasting a loop, confirm that you have the necessary rights to every video and audio track. A live stream can still raise copyright issues when the material is prerecorded, and authorization to upload a video does not automatically establish permission to rebroadcast it. Review YouTube’s current rules and any rights-holder restrictions for your content before going live.
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