Do these 3 things before closing this tab:
1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errorsTo send a Liquidsoap radio stream to YouTube Live, give the output both an audio source and a video track, encode them in a format YouTube accepts, then send the result with Liquidsoap’s output.youtube.live.rtmp operator and a YouTube stream key. A still station image can supply the video. Check the incoming preview and stream health in YouTube Live Control Room before relying on the broadcast.
What you need before configuring the output
- A working Liquidsoap radio source and a Liquidsoap build with the required FFmpeg integration. Liquidsoap’s current development documentation is labeled 2.5.x; use documentation matching your installed version because syntax and available options can differ. See the Liquidsoap Source / Output reference and FFmpeg support guide.
- A video source, such as a static station image or an audio-reactive visual. YouTube Live is a video broadcast destination, so an audio-only source alone does not provide a conventional audio-and-video live feed.
- A YouTube Live Control Room stream with its stream URL and key.
- Enough reliable outbound bandwidth for the combined audio and video bitrate, with headroom for fluctuations.
Liquidsoap’s project homepage shows a concise YouTube example using FFmpeg with H.264 video and AAC audio. That is a straightforward starting point, not a universal configuration: confirm that your Liquidsoap version and build provide the operators and codecs you plan to use.
Choose the video, encoding, and ingest settings
Provide a video track
For a radio station, a still image can be the video component while the radio source supplies audio. Liquidsoap’s FFmpeg guide demonstrates combining audio and video with source.mux.video before encoding. An animated or audio-reactive visual is another option, but it can require more processing than a still image; choose according to your production needs and available capacity. The documentation demonstrates composition, not a required visual design.
Use YouTube’s live recommendations
YouTube’s live encoder guidance supports RTMP/RTMPS ingest, H.264, H.265/HEVC, or AV1 video, AAC or MP3 audio, and frame rates up to 60 fps. It recommends constant bitrate (CBR), a 2-second keyframe interval, and no more than 4 seconds between keyframes. Its listed H.264 recommendations include 5 Mbps for 1080p30 and 3 Mbps for 720p30; those figures apply to those specific listed settings, not every codec or frame rate. YouTube recommends 128 kbps stereo AAC or MP3 audio. These are the current recommendations in YouTube Help, checked 2026-10-03; the page does not display a publication year. Consult its live encoder settings for the current table and the settings that match your output.
PC Slower Than It Used to Be?
A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Crashes, No Sound, or Screen Glitches?
Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minute#1 Best Overall
- Pro performance with great pre-amps - Achieve a brighter recording thanks to the high performing mic pre-amps of the Scarlett 3rd Gen. A switchable Air mode will add extra clarity to your acoustic instruments when recording with your Solo 3rd Gen
- Get the perfect guitar and vocal take with - With two high-headroom instrument inputs to plug in your guitar or bass so that they shine through. Capture your voice and instruments without any unwanted clipping or distortion thanks to our Gain Halos
- Studio quality recording for your music & podcasts - Achieve pro sounding recordings with Scarlett 3rd Gen’s high-performance converters enabling you to record and mix at up to 24-bit/192kHz. Your recordings will retain all of their sonic qualities
- Low-noise for crystal clear listening - 2 low-noise balanced outputs provide clean audio playback with 3rd Gen. Hear all the nuances of your tracks or music from Spotify, Apple & Amazon Music. Plug-in headphones for private listening in high-fidelity
- Everything in the box: Includes Pro Tools Intro+, Ableton Live Lite, Cubase LE, and Hitmaker Expansion: a suite of essential effects, powerful software instruments, and easy-to-use mastering tools
Choose RTMP or RTMPS deliberately
The Liquidsoap reference documents output.youtube.live.rtmp and gives rtmp://a.rtmp.youtube.com/live2 as its default URL. YouTube recommends RTMPS for encrypted transport. Do not assume an RTMPS URL works with every Liquidsoap release or output path: check your installed version’s documentation and confirm support before using it.
Leave bandwidth headroom
Measure outbound upload capacity, not download speed. YouTube’s streaming tips recommend keeping capacity above the stream’s total bitrate and leaving 20% headroom. If the connection is unstable, lower the video bitrate or resolution and retest rather than running at the limit. See YouTube’s streaming tips and encoder guidance.
Rank #2
- The new generation of the songwriter's interface: Plug in your mic and guitar and let Scarlett Solo 4th Gen bring big studio sound to wherever you make music
- Studio-quality sound: With a huge 120dB dynamic range, the newest generation of Scarlett uses the same converters as Focusrite’s flagship interfaces, found in the world's biggest studios
- Find your signature sound: Scarlett 4th Gen's improved Air mode lifts vocals and guitars to the front of the mix, adding musical presence and rich harmonic drive to your recordings
- All you need to record, mix and master your music: Includes industry-leading recording software and a full collection of record-making plugins
- Everything in the box: Includes Pro Tools Intro+, Ableton Live Lite, Cubase LE, and Hitmaker Expansion: a suite of essential effects, powerful software instruments, and easy-to-use mastering tools
Configure Liquidsoap to send the stream
The operator to investigate is output.youtube.live.rtmp. Its documented arguments include a required key, an encoder, a Liquidsoap source, and a url; its start option defaults to true. The example below shows the structure, not a copy-and-run script: source names, video construction, FFmpeg options, and exact syntax must match your installed version and build.
- Start with your existing radio source. Use the Liquidsoap source that already produces the station audio.
- Create or select a video source. For a simple radio broadcast, use a still station image. Combine it with the radio source so the output has both video and audio; consult the version-matched FFmpeg guide for the relevant muxing operators.
- Set the encoder. A common example uses H.264 video and AAC audio, both listed in YouTube’s supported live formats. Set bitrate, frame rate, resolution, CBR, and keyframe interval to values appropriate for the chosen output and current YouTube guidance.
- Pass the composed source, encoder, and key to
output.youtube.live.rtmp. Use the documented default RTMP URL unless you have verified that another URL or protocol is supported in your installed Liquidsoap output path. The Liquidsoap homepage illustrates the concise FFmpeg encoder form%ffmpeg(%video(codec="libx264"), %audio(codec="aac")); treat it as an example and check it against your version. - Start the output and verify the incoming feed. Watch YouTube’s preview and stream-health messages before announcing or depending on the live event.
For a single output, direct encoding is generally simpler to reason about. Liquidsoap also documents sharing encoded streams between outputs, but that can introduce container and global-header compatibility considerations; its FFmpeg guide discusses handling global headers when encoded data is shared. Use that approach only when you need it and have checked the format requirements.
Rank #3
- PLUG IN AND HEAR SOUND IN SECONDS - USB Type-A connector with a 3.5mm stereo headphone output and a separate 3.5mm mono microphone input. No drivers, no software, no external power - the adapter is USB bus-powered and is recognized as a standard USB audio device.
- WORKS ON WINDOWS, MAC AND LINUX - Driverless on Windows 98SE/ME/2000/XP/Server 2003/Vista/7/8, Linux and Mac OSX, and compliant with the USB Audio Device Class 1.0 specification, so any system that supports class-compliant USB audio will see it. Select it as the sound output and input device after plugging it in.
- TWO JACKS, TWO JOBS - The green jack is stereo OUT for headphones or powered speakers; the pink jack is mono microphone IN for a 3.5mm mic. It does NOT support 4-pole headsets on a single combo plug, it does NOT power passive speakers, and it does NOT add surround sound - it is a stereo 2-channel adapter.
- FOR LAPTOPS AND DESKTOPS THAT NEED AN AUDIO PORT BACK - Adds a headphone and mic port to a laptop, desktop, or mini PC whose onboard jack has failed or was never there. Managed and work-issued computers can block new USB audio devices by policy - check with your IT department before ordering for a company machine.
- SABRENT SUPPORT AND WARRANTY - What is in the box: one USB audio sound adapter. Backed by a 1-year limited warranty, extended to 2 years when you register within 90 days on the manufacturer's website.
Create and protect the YouTube stream key
- In YouTube Live Control Room, create or select the stream you intend to use.
- Copy the stream URL and stream key into the Liquidsoap output configuration. YouTube describes the key as the information that lets the encoder send a feed for YouTube to accept; treat it like a password. See YouTube’s stream setup and management guidance.
- Keep the key out of public scripts, screenshots, logs, and shared configuration. Liquidsoap’s book demonstrates reading it from a separate
youtube-keyfile and trimming surrounding whitespace withstring.trim(file.contents(...)). Match that file-reading syntax to your installed version; do not assume it is identical in every release. See the Liquidsoap book. - If the key is exposed, reset it in Live Control Room and replace the value used by Liquidsoap before resuming the stream.
Test before relying on the broadcast
- Send representative audio and video and confirm both appear in YouTube’s preview.
- Check YouTube’s stream-health messages for encoder or connection problems.
- Listen for clean, continuous audio and confirm the image or visual behaves as expected.
- Check outbound capacity under the intended bitrate and retain the recommended headroom.
- Test before going live to an audience and continue monitoring stream health during the event, as YouTube advises in its live-streaming guidance.
Troubleshoot common Liquidsoap-to-YouTube problems
YouTube shows no incoming feed
Recheck the stream URL and key, confirm Liquidsoap’s output is running, and verify the build has the FFmpeg support and operators your configuration requires. If the key was copied incorrectly or exposed, reset it in Live Control Room and update the configuration. See the YouTube stream-management guidance and Liquidsoap’s output reference.
YouTube receives audio but shows no picture
Ensure the source passed to the output contains a video track as well as audio. Check the audio/video composition and encoding in the Liquidsoap FFmpeg guide.
Rank #4
- Podcast, Record, Live Stream, This Portable Audio Interface Covers it All - USB sound card for Mac or PC delivers 48kHz audio resolution for pristine recording every time
- Be ready for anything with this versatile M-AUDIO interface - Record guitar, vocals or line input signals with two combo XLR / Line / Instrument Inputs with phantom power
- Everything you Demand from an Audio Interface for Fuss-Free Monitoring - 1/4" headphone output and stereo 1/4" outputs for total monitoring flexibility; USB/Direct switch for zero latency monitoring
- Get the best out of your Microphones - M-Track Duo’s transparent Crystal Preamps guarantee optimal sound from all your microphones including condenser mics
- The MPC Production Experience - Includes MPC Beats Software complete with the essential production tools from Akai Professional
YouTube reports an encoder issue
Compare the actual codec, resolution, frame rate, bitrate, CBR setting, and keyframe interval with YouTube’s current live encoder guidance. Do not substitute YouTube video-upload settings for live-stream recommendations; consult the live-specific encoder settings.
The ingest is unstable or drops
Check outbound bandwidth and connection stability, not just download speed. Reduce bitrate or resolution if necessary, preserve upload headroom, and watch YouTube’s stream-health indicators. YouTube’s streaming tips recommend 20% headroom above the stream’s total bitrate.
The Tool Desk
Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →Best Value
- The new generation of the artist's interface: Connect your mic to Scarlett's 4th Gen mic pres. Plug in your guitar. Fire up the included software. Start making your first big hit
- Studio-quality sound: With a huge 120dB dynamic range, the newest generation of Scarlett uses the same converters as Focusrite’s flagship interfaces, found in the world's biggest studios
- Never lose a great take: Scarlett 4th Gen's Auto Gain sets the perfect level for your mic or guitar, and Clip Safe prevents clipping, so you can focus on the music
- Find your signature sound: Air mode lifts vocals and guitars to the front of the mix, adding musical presence and rich harmonic drive to your recordings
- With Scarlett 4th Gen, you have all you need to record, mix and master your music: Includes industry-leading recording software and a full collection of record-making plugins
The configuration syntax or encoder is unavailable
Check which Liquidsoap version is installed and use documentation for that version. The current development reference is labeled 2.5.x, while the book link here is for version 2.2.5; optional arguments and file-reading syntax may differ. FFmpeg integration also depends on the external OCaml-FFmpeg binding package and the local build, so a documented operator may not be available in every installation. See the source/output reference and FFmpeg support guide.
Or let it run in the cloud
If your goal is a YouTube channel that keeps uploaded recordings playing continuously, rather than a live radio source generated by Liquidsoap, StreamNeo is a different route: upload a recording or build a playlist, add your YouTube stream key once, and go live. It loops the uploaded video from the cloud, so no computer or home connection has to stay on. It is for YouTube only and does not send a live camera feed.
Quick Recap
- Any quality up to 4K 60fps at one flat price per slot, with uploads streamed as made and no re-encode or quality tiers.
- Automatic recovery if YouTube drops the stream.
- The first day is free with no card, one free day per account.
- Monthly: $9.99 per month.
Start your free StreamNeo day.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
