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You can stream a prerecorded video to YouTube Live from an Amazon Lightsail instance by running an encoder on the instance and sending its output to the YouTube ingest URL with the event’s stream key. For a scheduled event, start the encoder, confirm the preview in YouTube’s Live Control Room, then select Go live. The video file is the encoder’s input; viewers watch the YouTube event, not the Lightsail server.
What you need before you start
- A YouTube channel eligible for live streaming. YouTube’s current getting-started guidance requires a verified channel, no live-streaming restrictions in the previous 90 days, and a minimum age of 16: YouTube live-streaming eligibility.
- A Linux/Unix Lightsail instance in Mumbai that you can access over SSH, with enough compute capacity and stable outbound bandwidth for the chosen encoding settings.
- The prerecorded video available on the instance or at a location the encoder can read.
- An encoder installed for the instance’s operating system. Package names and installation commands vary by distribution and release; AWS allows software installation on Lightsail instances, but there is no single command that applies to every image.
Lightsail’s Mumbai location does not by itself establish that a particular instance plan can encode a given file reliably. AWS recommends EC2 for consistently high-CPU applications such as video encoding, so test the actual workload before relying on a Lightsail instance for a long event.
Create the YouTube event and get its stream credentials
- In YouTube Studio, select Create, then Go Live. Create a stream or open the scheduled event you intend to use.
- In the Live Control Room, copy the event’s ingest server URL and stream key into your encoder’s output settings. YouTube describes the stream key as the encoder’s password, so do not share it or publish it in a command, screenshot, or log that others can access. See YouTube’s encoder setup guidance and stream settings guidance.
- If the key may have been exposed, reset it in Live Control Room and replace the old value in the encoder before starting again.
Use RTMPS rather than unencrypted RTMP when your encoder supports it. Choose the ingest URL shown for the event; do not substitute a guessed server address.
Prepare the Lightsail instance and video file
- Connect to the Linux/Unix instance over SSH using the method and credentials for the image you selected. AWS’s Lightsail instance connection guide describes the connection process.
- Install an encoder compatible with that operating system. The exact package name and install command depend on the distribution and release, so follow the package instructions for the selected image rather than copying a command intended for another system.
- Put the source video on the instance, or ensure the encoder can access its location. Check that the file is readable by the account running the encoder and that the instance has enough storage for it.
- Before encoding, note the source’s resolution, frame rate, video codec, and audio format. These determine whether you can preserve its characteristics directly or need to transcode; transcoding adds CPU demand.
FFmpeg supports a general input-to-output command-line workflow, but the exact command depends on the source, encoder build, output URL format, and settings. The steps here describe the workflow without presenting an unverified command as tested. See the FFmpeg documentation.
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Choose settings the instance and connection can sustain
Set the encoder to send the video and audio to the event’s YouTube ingest URL using the stream key. YouTube’s general RTMP/RTMPS recommendations include H.264 video, AAC or MP3 audio, constant bitrate encoding, up to 60 frames per second, and a two-second keyframe interval (do not exceed four seconds). Its recommended H.264 video bitrate for 1080p at 30 fps is 10 Mbps. These are YouTube recommendations, not a guarantee that a particular Lightsail plan can encode or upload them successfully. Details are in YouTube’s encoder settings.
- Resolution and frame rate: Match the source when practical. Lowering either can reduce encoding demand and required bandwidth, but changes the delivered picture or motion.
- Codec and audio: Use H.264 video with AAC or MP3 audio for YouTube’s general recommendations. Confirm that the source contains the audio you expect and that the encoder is outputting it.
- Bitrate: Use a constant bitrate and keep total video-plus-audio bitrate below stable outbound capacity. YouTube recommends 20% upload-bandwidth headroom above the total stream bitrate; a connection that only reaches the target intermittently is not a reliable basis for a live event. See YouTube streaming tips and settings.
- Keyframes: Set a two-second interval and do not exceed four seconds, in line with YouTube’s guidance.
Encoding and uploading are separate constraints. A stream can fail even if the instance has enough bandwidth when its CPU cannot encode at the selected settings; conversely, sufficient CPU does not help if outbound throughput is unstable. Watch CPU usage and YouTube stream health during a test using the actual video and settings.
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Start the encoder, confirm the preview, and go live
- Start the encoder with the event’s ingest URL and stream key, using the settings selected above.
- Wait for the YouTube Live Control Room preview. Confirm that the picture moves and the audio is present, then check the stream-health indicators.
- For a scheduled event, select Go live in Live Control Room after the preview is ready. Sending the encoder feed does not necessarily start the public event by itself.
- Monitor playback and stream health while the event is running. When finished, stop the encoder and end the event in YouTube Studio.
YouTube says streams under 12 hours are automatically archived. Do not assume that a longer stream will be archived in the same way; plan to retain the source file separately if you need a copy.
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For this publishing workflow, the encoder initiates an outbound connection from the instance to YouTube. Lightsail instance firewalls filter traffic arriving at the instance’s public IP; AWS says they do not control outbound traffic and allow all outbound traffic. You ordinarily do not need to open an inbound RTMP port to send a stream to YouTube. See Amazon Lightsail’s firewall documentation.
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Keep inbound access limited to what you need. In particular, AWS advises restricting SSH source addresses where practical. Lightsail’s IPv4 and IPv6 firewall rules are separate, so review both if you use both address types.
Lightsail or EC2 for encoding?
Lightsail offers fixed bundles of vCPU, memory, SSD storage, and transfer allowance; EC2 offers more workload control. The relevant trade-off is simplicity versus the ability to choose compute resources for sustained CPU work. AWS specifically recommends EC2 for consistently high-CPU applications such as video encoding. The reviewed AWS guidance does not establish a Mumbai-specific performance result, a suitable Lightsail bundle, or a current cost for this workload. Benchmark with the actual file, codec, frame rate, resolution, and filters rather than assuming a plan will be adequate. See AWS Lightsail FAQ.
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Troubleshooting common failures
| Symptom | Likely cause | What to check or change |
|---|---|---|
| YouTube shows no incoming signal | The encoder is not running, or the ingest URL or stream key is incorrect. | Confirm the event is the intended one, copy its current URL and key again, and restart the encoder. Reset an exposed key in Live Control Room. |
| Preview appears, but the event is not public | A scheduled event may still need the Live Control Room action. | Confirm the preview is ready, then select Go live for the scheduled event. |
| Video buffers or stream health is poor | Outbound bandwidth is unstable or the total bitrate is too close to available upload capacity. | Check stable outbound throughput, preserve YouTube’s recommended 20% headroom, and reduce bitrate or output resolution if needed. |
| Frames drop or encoding falls behind | The instance may not sustain the encoding workload. | Watch CPU usage during a test with the real file. Reduce resolution, frame rate, bitrate, or demanding filters, or move sustained high-CPU encoding to a more suitable compute service such as EC2. |
| Picture works but audio is missing | The source may lack an audio track, or the encoder may not be sending it in a supported format. | Verify the source audio track and encoder output settings; use AAC or MP3 audio in line with YouTube’s general recommendations. |
| Connection fails after changing firewall rules | Inbound rules may have been changed unnecessarily, or the rules differ between IPv4 and IPv6. | Remember that publishing to YouTube is outbound and does not ordinarily require an inbound RTMP rule. Review the separate address-family rules and preserve only needed inbound access. |
Or let it run in the cloud
If your goal is to keep a prerecorded YouTube stream running without managing an encoder host, StreamNeo is a cloud service that loops uploaded videos or playlists on YouTube. Upload a recording or build a playlist, add your YouTube stream key once, and go live. Nothing has to stay on at home; it streams the uploaded quality up to 4K 60fps at one flat price per slot, and it automatically recovers if YouTube drops the stream. The first day is free with no card. Monthly pricing is $9.99 per month. StreamNeo is for YouTube streams, not camera broadcasts. Start your free day with StreamNeo.
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