You can keep a prerecorded YouTube stream running from an EC2 Linux instance by having FFmpeg publish the video in the foreground and systemd supervise that process. Enable YouTube Live, configure a compatible FFmpeg input and RTMPS output, protect the stream key, and enable the service at boot. This keeps the stream independent of your home computer, but a single EC2 instance and a process restart policy do not guarantee uninterrupted streaming.
How the setup works
The path is: an EC2 Linux host reads a local media file, FFmpeg sends it to YouTube’s ingest endpoint, and systemd starts and supervises FFmpeg. YouTube’s stream URL and key come from Live Control Room. The key authorizes publishing, so treat it like a password.
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This guide uses a prerecorded file as the source. It does not make a camera feed live. The example commands and unit below are implementation templates, not a tested deployment; check your distribution’s systemd conventions and test the stream before relying on it.
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Enable live streaming and create a stream
- Sign in to the YouTube channel that will host the stream. The channel must be verified and have live streaming enabled. First-time activation can take up to 24 hours, so enable it before your planned start.
- In YouTube Live Control Room, create or select a live stream and copy the stream URL and stream key into your encoder configuration. Use the RTMPS endpoint shown there if your FFmpeg build supports it. Do not assume that a default URL is the encrypted endpoint.
- For initial setup, use a private or unlisted test stream. Check the Control Room preview and stream health, and confirm that both audio and video are correct before switching to a public broadcast.
YouTube Help recommends RTMPS, an encrypted extension of RTMP. Its current encoder guidance (accessed October 3, 2026) lists RTMP/RTMPS, H.264, H.265 and AV1 video, constant bitrate (CBR), frame rates up to 60 fps, and a recommended two-second keyframe interval that should not exceed four seconds. Confirm that the installed FFmpeg build supports the chosen codec and output protocol.
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Pick a bitrate for the actual stream profile
Choose the matching codec, resolution and frame-rate row in YouTube’s encoder table, and distinguish its minimum from its recommended bitrate. Do not copy a number from a different profile. For example, YouTube’s published H.264 recommendations include 5 Mbps for 1080p at 30 fps and 17 Mbps for 1080p at 60 fps; for 720p, it lists 8 Mbps at both 30 and 60 fps. For stereo audio, its guidance lists 128 Kbps and a 44.1 kHz sample rate. These are YouTube recommendations, not a guarantee that a particular instance, source or network path will work well at those settings. YouTube advises matching quality to reliable network capacity, testing beforehand, and monitoring stream health.
Prepare the EC2 host and media file
Check access and outbound networking
- Allow only the inbound access you need. If you use SSH, restrict it to your administrator’s IP range; alternatively, use a managed access method.
- A normal encoder-to-YouTube setup initiates an outbound connection from EC2. It does not require an inbound RTMP port open to the instance. Check outbound security-group rules, subnet routing, DNS resolution, and any network ACL or host firewall rules. AWS security groups are stateful, so response traffic for an allowed outbound connection is permitted.
- Choose an instance with enough CPU for the FFmpeg workload, especially if encoding or applying filters. The suitable size depends on the source and output settings; there is no universal instance size established for this job.
Install FFmpeg and check the input
Install FFmpeg using the package source supported for your Linux distribution, then confirm the executable path and build capabilities with command -v ffmpeg and ffmpeg -version. If you plan to use RTMPS or a particular encoder, check that the build includes the required protocol and codec support. Put the source file in a stable location, for example /srv/stream/source.mp4, and ensure the service account can read it. A missing or unreadable file will prevent a successful restart.
Decide between stream copy and transcoding
Stream copy avoids decoding and re-encoding, so it uses less CPU and does not add another generation of encoding loss. Use it only when the file’s codecs and stream properties are compatible with YouTube ingest and your chosen output container. Transcode if you need to change codec, resolution, frame rate, bitrate, audio, or apply filters. Transcoding gives you control over those properties but consumes more CPU and can reduce quality. FFmpeg’s documentation describes stream copy and transcoding as different approaches; inspect your file and test the actual result rather than assuming its extension proves compatibility.
Configure FFmpeg to loop the video
Example: transcode a file to 1080p30 H.264
The following is a starting template for a compatible FFmpeg build and a source that can be decoded. Replace the endpoint and key placeholders with the values for your stream. Do not paste a real key into a public script, shared document, or shell command that will remain in shell history.
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ffmpeg -re -stream_loop -1 -i /srv/stream/source.mp4
-c:v libx264 -preset veryfast
-b:v 5M -minrate 5M -maxrate 5M -bufsize 10M
-r 30 -g 60 -keyint_min 60 -sc_threshold 0
-c:a aac -b:a 128k -ar 44100 -ac 2
-f flv 'RTMPS_ENDPOINT/STREAM_KEY'-re reads the file at approximately its media rate, while -stream_loop -1 requests repeated playback. The example’s video bitrate and audio settings correspond to YouTube’s published H.264 recommendations for 1080p30 and stereo audio; -g 60 and -keyint_min 60 request a two-second keyframe interval at 30 fps. Confirm that the chosen endpoint format is correct for the URL shown in Live Control Room and that your FFmpeg build accepts it.
Use stream copy only when the source fits
If inspection and a private test confirm that the source streams already meet YouTube’s ingest requirements and need no resizing or filtering, a copy-based variant avoids re-encoding:
ffmpeg -re -stream_loop -1 -i /srv/stream/source.mp4
-c copy -f flv 'RTMPS_ENDPOINT/STREAM_KEY'Some files or codec/container combinations will not work with this output, and looping a particular file may reveal timestamp or playback problems. If the output is rejected, the stream stutters, or you need a different profile, use a compatible transcode and inspect the source and FFmpeg error output. In either example, the key appears in the output URL passed to FFmpeg; take care with local access to process arguments as well as with shell history.
Run FFmpeg under systemd so it survives a disconnect
Do not start the job in an interactive SSH session and rely on that shell to stay open. Run FFmpeg as the foreground process managed by a systemd service; closing your laptop or disconnecting SSH then does not itself stop the service.
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Store the key with restricted access
Use a credential mechanism supported by your systemd and operating-system versions rather than putting a real key in a public unit file. The template below expects a systemd version that supports LoadCredential= and a protected file at /etc/streamer/youtube-key. Restrict access to the source credential file to administrators. A small wrapper can read the credential and invoke FFmpeg; because the output URL contains the key, the key may still be visible to privileged users who can inspect process arguments. Account for that in your host’s access model.
For example, save a wrapper as /usr/local/bin/youtube-loop, owned by root and not writable by the service account. Replace the endpoint with the RTMPS endpoint from Live Control Room. This illustrative wrapper uses the transcode profile above:
#!/bin/sh
set -eu
key=$(cat "$CREDENTIALS_DIRECTORY/youtube-key")
exec /usr/bin/ffmpeg -re -stream_loop -1 -i /srv/stream/source.mp4
-c:v libx264 -preset veryfast
-b:v 5M -minrate 5M -maxrate 5M -bufsize 10M
-r 30 -g 60 -keyint_min 60 -sc_threshold 0
-c:a aac -b:a 128k -ar 44100 -ac 2
-f flv 'RTMPS_ENDPOINT/'"$key"Protect the wrapper and credential according to your host’s policy. The sample assumes the endpoint takes the key after a slash; use the exact URL/key arrangement YouTube displays rather than assuming that format applies to every endpoint.
Create and enable the service
Save a unit such as /etc/systemd/system/youtube-loop.service, adapting the account, paths, and dependencies to your distribution:
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[Unit]
Description=YouTube prerecorded stream
Wants=network-online.target
After=network-online.target
[Service]
Type=exec
User=streamer
Group=streamer
WorkingDirectory=/srv/stream
LoadCredential=youtube-key:/etc/streamer/youtube-key
ExecStart=/usr/local/bin/youtube-loop
Restart=on-failure
RestartSec=5s
[Install]
WantedBy=multi-user.targetType=exec keeps the service’s main process under systemd supervision and reports execution setup failures. Restart=on-failure asks systemd to restart FFmpeg after an abnormal exit; the five-second delay is an example to tune and observe, not a universally optimal value. Network ordering helps at boot but does not prove that DNS, routing, or YouTube is reachable when FFmpeg starts.
- After saving the unit and wrapper, reload unit definitions:
sudo systemctl daemon-reload. - Enable the service at boot and start it now:
sudo systemctl enable --now youtube-loop.service. - Check whether systemd started it:
sudo systemctl status youtube-loop.service. - Read service output and errors:
sudo journalctl -u youtube-loop.service -f. - Confirm the preview and stream health in YouTube Live Control Room. A running process alone does not establish that YouTube is receiving healthy audio and video.
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Keep the stream healthy and know what restarts do
What systemd can recover from
Systemd can restart FFmpeg after a process failure while systemd and the EC2 host remain operational. It does not fix a source file that has been deleted or become unreadable, a reset or invalid key, CPU exhaustion, blocked outbound traffic, YouTube account restrictions, an FFmpeg process that is alive but stalled, a failed instance, or a regional outage.
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Check both layers: use systemctl status and the service journal to diagnose the process, and Live Control Room’s preview and stream-health view to diagnose what YouTube receives. YouTube recommends preflight testing and health monitoring. A simple restart directive is not a health check: an encoder may keep running while its output is unhealthy.
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Test reboot and recovery deliberately
Before relying on the service, test it with a private or unlisted stream. Confirm that it starts after a controlled reboot, that the source loops as intended, and that a deliberate FFmpeg stop produces the expected systemd restart. Verify the corresponding preview and health state in YouTube. If you need stronger availability, add separate process or stream monitoring and design and test an independent failover plan. A second recovery path must account for publishing to the same stream and avoiding conflicting encoders; do not assume a single instance provides high availability.
Check archive expectations separately
YouTube’s encoder setup guidance says streams under 12 hours are automatically archived. That statement does not establish archive behavior for a stream exceeding 12 hours. If you need a dependable recording, design and validate a separate recording or segmentation approach and check YouTube’s current limits rather than treating the live feed as an indefinite archive.
Understand the ongoing EC2 cost
Expect ongoing compute charges while the On-Demand instance is running; outbound data transfer may add a separate charge. The total depends on AWS Region, instance type and operating system, storage, and the amount of data sent at your chosen bitrate. No single monthly figure is reliable without those inputs. Check AWS’s current EC2 On-Demand pricing and data-transfer terms, or use its pricing calculator with your actual Region, instance, OS, disk, and expected transfer. AWS pricing and allowance eligibility vary by geography and can change.
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