To broadcast a recorded sermon as a YouTube Live stream from Ubuntu Server 24.04, prepare a YouTube Live broadcast, then use FFmpeg to play the local video at normal speed and send its audio and video to YouTube over RTMPS. You will need the broadcast’s ingestion URL and private stream key, a readable media file, and an internet connection able to sustain the chosen bitrate. The commands below are templates: check your server’s FFmpeg build and the file’s codecs before choosing stream copy or transcoding.
What you need before you start
- A YouTube channel with access to the Live Control Room and a broadcast configured for the intended date and audience. Channel eligibility and account-specific settings can affect what options are available.
- Ubuntu Server 24.04 with FFmpeg installed. Package versions and enabled encoders can vary, so verify the tools on the actual server rather than assuming a particular build.
- A sermon recording stored on the server, with read permission for the account that will run FFmpeg.
- Enough sustained upload bandwidth for the outgoing video and audio bitrate, plus some headroom for network variation.
YouTube treats the incoming encoder stream and the viewer-facing broadcast as related but distinct objects. Select the intended broadcast and use the stream settings associated with it; do not assume that starting an encoder alone creates or starts the correct broadcast. See YouTube’s LiveStreams API reference.
Prepare the YouTube Live broadcast and stream key
- Open YouTube Studio and go to the Live Control Room. Create or select the scheduled broadcast you want viewers to watch.
- Open the broadcast’s stream settings and copy the ingestion address and stream key shown for that stream. Keep the key private: anyone who has it may be able to send video to your channel.
- Use the RTMPS endpoint and path supplied by YouTube. RTMPS adds TLS to RTMP, and YouTube’s ingestion guidance specifies a secure endpoint and port 443. Do not substitute a URL copied from an unrelated example. See YouTube’s RTMPS ingestion guide.
- Leave the Live Control Room available during testing and the event so you can inspect the incoming preview, stream health and messages.
Check the file and the Ubuntu FFmpeg build
First confirm the input path, its audio/video streams and its codecs. Replace /srv/sermons/sunday-sermon.mp4 below with the actual path:
ffprobe -hide_banner -i /srv/sermons/sunday-sermon.mp4
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ffmpeg -versionffmpeg -hide_banner -encoders
Confirm that the file is readable by the account that will run the stream. If the file has unusual codecs, multiple audio tracks, no audio, or variable frame rate, decide how to handle those characteristics before going live. These checks describe your local file and installed build; YouTube’s published guidance does not establish what is installed on a particular Ubuntu 24.04 host.
Choose output settings that YouTube can ingest
YouTube’s encoder guidance lists H.264, H.265/HEVC and AV1 video options, AAC or MP3 audio, constant bitrate (CBR), frame rates up to 60 fps, and a recommended two-second keyframe interval that should not exceed four seconds. Confirm your FFmpeg build supports the codec combination you choose. The current guidance is at YouTube’s encoder settings page.
For an H.264 output, YouTube publishes these minimum and recommended video bitrates by resolution and frame rate:
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| Output | Minimum H.264 video bitrate | Recommended H.264 video bitrate |
|---|---|---|
| 720p30 | 3 Mbps | 8 Mbps |
| 720p60 | 3 Mbps | 8 Mbps |
| 1080p30 | 5 Mbps | 14 Mbps |
| 1080p60 | 6 Mbps | 17 Mbps |
These are YouTube’s published H.264 values, not a guarantee that your connection can sustain them or that every sermon needs the highest setting. Match the output resolution and frame rate to the source and the desired viewing quality, then make sure the server’s upload can hold the video bitrate plus audio and network overhead without interruption. A 1080p30 H.264 example using YouTube’s recommendation is 14 Mbps video; YouTube also recommends AAC stereo audio at 128 Kbps.
Send the sermon with FFmpeg
Use the exact RTMPS ingestion URL and stream key from the selected YouTube broadcast. The commands below are adaptable examples, not a verified Ubuntu 24.04 package-specific test. Put credentials in a protected location and avoid leaving a stream key in shell history, shared logs or screenshots.
Option A: copy already compatible streams
If the file’s video and audio codecs, parameters and stream layout are suitable for YouTube, stream copy avoids re-encoding. This template selects the first video and first audio stream and copies them:
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ffmpeg -re -i /srv/sermons/sunday-sermon.mp4 -map 0:v:0 -map 0:a:0 -c:v copy -c:a copy -f flv "rtmps://YOUR_YOUTUBE_INGESTION_URL/YOUR_STREAM_KEY"
Replace the RTMPS placeholder with the full endpoint and key exactly as YouTube provides them. Do not literally include the placeholder text. The -re option reads the file at its natural playback rate instead of sending it as fast as the server can process it. The FLV muxer is used for the RTMP-family output; it does not mean the input file itself must be FLV.
Copying is only appropriate when the source streams are compatible and the output meets the chosen YouTube settings. If YouTube reports an unsupported codec, bitrate or keyframe interval, or if the source has multiple tracks or unsuitable parameters, transcode rather than assuming copy will work.
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Option B: transcode to 1080p30 H.264 and AAC
For a source that needs transcoding, this template targets 1080p30 H.264 at a 14 Mbps video rate, AAC stereo at 128 Kbps and a two-second GOP. Verify that your FFmpeg build includes libx264 and that the server can encode in real time:
ffmpeg -re -i /srv/sermons/sunday-sermon.mp4 -map 0:v:0 -map 0:a:0 -vf "scale=1920:1080:force_original_aspect_ratio=decrease,pad=1920:1080:(ow-iw)/2:(oh-ih)/2,fps=30" -c:v libx264 -preset veryfast -tune zerolatency -b:v 14M -minrate 14M -maxrate 14M -bufsize 28M -g 60 -keyint_min 60 -sc_threshold 0 -pix_fmt yuv420p -c:a aac -b:a 128k -ar 48000 -ac 2 -f flv "rtmps://YOUR_YOUTUBE_INGESTION_URL/YOUR_STREAM_KEY"
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If the source has no audio, the example will fail because it maps an audio stream. If it has several tracks, explicitly choose the intended one. If you need a different resolution or frame rate, change the filter, bitrate and GOP together rather than changing only one setting.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Test, then start the broadcast
- Run a test stream well before the sermon is due. Use a recording segment with audio and visual movement similar to the full sermon; a static title card alone will not reveal every issue.
- Check the incoming preview in the Live Control Room. Listen for clean audio, verify picture framing and synchronization, and make sure the stream is arriving under the intended broadcast.
- Monitor YouTube’s stream health and messages. Its diagnostics can report unsupported codecs or resolution, bitrate outside expected ranges, long keyframe intervals, missing audio or video, multiple streams, and starved video. The LiveStreams API documentation describes health states and configuration issues.
- When the test is satisfactory, stop it and start the scheduled broadcast at the intended time using the Live Control Room’s available controls. Confirm the broadcast is live to viewers before leaving the session unattended.
Run the stream unattended on Ubuntu
For an unattended service, run the encoder under an appropriate process supervisor or scheduler, keep logs, and decide how an operator will be alerted if the process exits or YouTube stops receiving data. A restart policy can recover from a process failure, but it does not by itself diagnose network, key, source-file or platform problems. Test the chosen service configuration with the actual user account, file permissions and secrets before relying on it for a live service. The YouTube and Ubuntu sources cited here do not prescribe a specific systemd unit or guarantee a restart policy.
Troubleshooting common failures
- YouTube receives no video: Check that the selected broadcast is the intended one, the RTMPS endpoint and key were copied correctly, and the server can make outbound connections to the provided endpoint on port 443. Review FFmpeg output and the Live Control Room messages.
- Authentication or connection fails: Recopy the stream key and full ingestion address from the selected broadcast, check for accidental whitespace or truncation, and ensure the URL uses the secure RTMPS endpoint YouTube supplied.
- Unsupported codec, resolution or keyframe warning: Inspect the input with
ffprobe. If its streams do not match YouTube’s settings, transcode to a supported output and keep the keyframe interval at two seconds or less than or equal to four seconds. - Bitrate warning or unstable health: Compare the configured output with the chosen resolution and frame rate, then check sustained upload capacity. Reduce the output resolution or bitrate if the connection cannot maintain the target; avoid setting the encoder at the limit of a variable connection.
- Audio is absent or wrong: Confirm an audio stream exists, map the intended track, and check the Live Control Room preview. The example commands select the first audio stream only.
- Video stutters or falls behind: Check whether FFmpeg is encoding slower than real time, whether the server is overloaded, and whether the connection is stable. Test the same output settings before the event and use stream-health messages to distinguish encoding from ingestion problems.
- FFmpeg cannot find the file: Use the absolute file path and confirm read access for the service account. A path available in an interactive shell may not be accessible to a service running as another user.
File containers are not the same as the live output
An input sermon can be an MP4, MKV or another readable format; the outgoing stream is packaged for the selected RTMP-family protocol. OBS’s format guide describes MKV as its default for resilient local recording, MP4 as widely compatible but requiring finalization, and FLV as an RTMP container with limited H.264/AAC codec support. Those notes apply to OBS recordings and do not mean you must convert a source sermon to FLV before FFmpeg reads it. See the OBS Audio/Video Formats Guide.
Or let it run in the cloud
If you do not want an Ubuntu server, home computer or network connection responsible for keeping the broadcast running, StreamNeo is a YouTube-only cloud service for looping uploaded videos. Upload the sermon recording or build a playlist, add your YouTube stream key once, and go live. The service keeps playback running in the cloud, supports uploads as made up to 4K 60fps at one flat price per slot, and automatically recovers if YouTube drops the stream. The first day is free with no card. Monthly is $9.99 per month. Start your free StreamNeo day.
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