In OBS, add the video as a Media Source, enable Loop, and verify that its audio reaches the stream’s active mixer. Before broadcasting, test the same file and scene in a private or unlisted YouTube stream. Compare sync at the start, near the end, and immediately after the loop: a steady offset may be adjustable, but drift that grows over time or a jump at the loop point calls for diagnosing the file, source timing, or playback load.
Check the video file before setting up OBS
Play the original file from beginning to end in a local player. Listen and watch at the start, near the end, and across the transition from the final frame back to the first. If the file already has misaligned audio and video, an ending gap, or a discontinuity at that transition, enabling a loop in OBS will repeat the problem rather than repair it. OBS documents looping, but there is no single file-preparation recipe established to make every format loop seamlessly.
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Set up a single-file loop in OBS
- In your scene’s Sources panel, choose + and add a Media Source. Give it a clear name.
- In the Media Source properties, select the local video file and enable Loop. OBS restarts the file when playback completes. For a playlist, OBS also supports VLC Video with its loop-playlist option; VLC must be installed. See the OBS Media Sources guide.
- Watch the audio mixer while the file plays. Confirm the source is not muted and that its audio is included in the mix sent to the stream. If you monitor audio, listen for the source there as well; monitoring alone does not confirm what viewers receive.
- Keep the file, scene, frame rate, encoder, and audio path the same as you intend to use on air. Changing these between the test and broadcast weakens the value of the test.
Test the full stream and identify the kind of sync error
Make a private or unlisted test using the actual file and planned setup. YouTube recommends testing with audio and movement similar to the planned stream, then monitoring stream health and messages during the event. Check a local OBS recording and the received YouTube stream at the beginning, middle, end, and immediately after the next loop begins. The local recording helps separate a source or OBS issue from a problem visible only in the received stream.
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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware match| What you hear or see | What to check | Next step |
|---|---|---|
| Audio is late or early by about the same amount throughout. | Whether the offset affects only the Media Source or every audio source. | Measure the offset, adjust the affected source’s sync timing in small increments, and repeat the full test. Avoid delaying all audio if only one source is out of sync. |
| The mismatch becomes larger as playback continues. | Media timestamps and encoding, decoder or CPU/GPU load, and consistency of the audio sample rate. | Investigate the source and playback path rather than applying an arbitrary fixed delay. No single correction value is established for every file and computer. |
| Sync is acceptable during playback but jumps at every loop. | The file’s ending and beginning, their audio/video durations, and what happens when playback restarts. | Inspect or revise the source transition. A constant audio delay cannot correct a discontinuity that occurs only at the loop boundary. |
| OBS reports dropped frames or an unstable connection. | Connection stability and whether the network can sustain the selected bitrate. | Address the connection or bitrate issue and retest. Dropped frames indicate connection instability or an unsustainable bitrate; they do not, by themselves, prove the cause of audio drift. See OBS connection troubleshooting. |
Use YouTube’s 4K60 ingest settings as a starting point
YouTube’s encoder guidance lists the following recommendations for a 4K/2160p stream at 60 fps. They are ingest targets, not a guarantee that your computer or internet connection can sustain the stream. The page does not state a publication date, so check it again before relying on these volatile settings.
#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
| Setting | YouTube guidance for this workflow |
|---|---|
| Video codec and bitrate | For H.264, 35 Mbps recommended. For AV1 or H.265, the listed range is 10–40 Mbps. |
| Rate control | CBR. |
| Keyframe interval | 2 seconds recommended; do not exceed 4 seconds. |
| Frame rate | Up to 60 fps. |
| Audio codec and bitrate | AAC or MP3; 128 kbps recommended for stereo or 384 kbps for 5.1 surround. |
| Audio sample rate | 44.1 kHz recommended for stereo; 48 kHz for 5.1 surround. |
| Ingest protocol | RTMPS recommended. |
| Latency | 4K/2160 streams do not have the “improve for low latency” option and are optimized for normal latency. |
These are YouTube’s recommendations, not settings that diagnose sync. Check that your upload connection is stable at the selected bitrate before going live, and monitor stream health during the test. The official guidance is at YouTube’s live encoder settings.
Or let it run in the cloud
If you want a pre-recorded video to loop on YouTube Live without keeping OBS or a computer running at home, StreamNeo runs the stream from the cloud. Upload the recording, add your YouTube stream key, and go live. It plays uploaded videos; it does not stream a camera feed. StreamNeo does not correct sync problems baked into a source file, so verify the file’s audio and loop transition before uploading.
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
- Nothing at home has to stay on for the stream to keep running.
- The video streams as uploaded, up to 4K 60fps, at one flat price per slot with no re-encode or quality tiers.
- StreamNeo automatically recovers if YouTube drops the stream.
- The first day is free with no card required; it is one free day per account.
- Monthly billing is $9.99 per month. Other available terms are daily, weekly, six months, and yearly; the same product is included on every plan, with the billing length changing.
- Each slot includes one always-on stream, 10 GB storage per slot pooled across active slots, 24/7 looping and playlists, and support from the StreamNeo team. UPI and cards are available in India; card checkout is available worldwide.
Start your free first day with StreamNeo.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Copyright and YouTube channel considerations
A technically stable loop does not establish that you have the right to broadcast the recording. Confirm that you own or have permission to use both the video and its audio, and review YouTube’s applicable copyright rules before streaming. Repeatedly broadcasting pre-recorded material also does not by itself establish that a channel meets YouTube’s monetization requirements; channel eligibility and content review are separate from audio sync. Keep proof of licenses or permissions for material you did not create.
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Quick Recap
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
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
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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.
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.
