First, play the original video file locally. If its audio and video are already out of sync, correct or re-encode the file before uploading it again. If the original is in sync, compare the StreamYard output and YouTube playback to find where the mismatch first appears; do not assume YouTube or StreamYard caused it without checking.
Find where the audio goes out of sync
Compare the same point in the video at each stage: the original file on your device, the prerecorded output from StreamYard, and the video as played on YouTube. Note whether the audio is consistently early or late, or whether the gap grows as playback continues. These comparisons help narrow down where the problem appears; they do not, by themselves, prove which service or device is responsible.
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- Out of sync in the original file: the problem is present before streaming. Check the edit or export, then prepare a corrected file.
- Original is in sync, but the StreamYard output is not: investigate the file’s format and encoding, then re-encode and test it.
- Original and StreamYard output appear in sync, but YouTube playback does not: check the audio and video track durations, then compare playback on another device or player before assigning a cause.
- The gap grows over time: record how it changes from the beginning to the end. This is useful diagnostic information, not proof of a particular cause.
Check that the audio and video tracks have matching durations
YouTube’s guidance is to make sure the audio and video track durations match. If one track is shorter or longer, edit the tracks in video-editing software before uploading the content to YouTube. Check the full tracks, not just a short section that happens to play in sync.
Re-encode the file using StreamYard’s recommended settings
StreamYard’s prerecorded-video optimization guidance recommends using HandBrake to prepare a file for its prerecorded workflow. The guide recommends these settings; they are not a guarantee that every audio-sync problem will be fixed.
#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 | Recommended value |
|---|---|
| Container | MP4 |
| Video codec | H.264 (x264) |
| Frame rate | Constant 30 fps |
| Audio codec | AAC |
| A/V start | Enable “Align A/V Start” |
| Web optimization | Enable “Web Optimized” or faststart |
| Total bitrate | Below 10,000 kbps |
- Keep an untouched copy of the original file so you can compare it with the re-encoded version.
- Open the file in HandBrake and set the video, audio, frame-rate, A/V start, web-optimization, and bitrate options to the values above.
- Export the new file and play it locally. Check both the beginning and a later point to see whether the sync is steady throughout.
- Upload the corrected file to StreamYard and test a short segment before scheduling or running the full video.
StreamYard’s current format information describes MP4/MOV uploads with H.264 video and AAC audio, and says upload limits depend on the plan. Check StreamYard’s current help information for applicable upload limits and supported formats, since these can change.
Use browser and audio-device checks only when they fit the symptoms
StreamYard also recommends trying Chrome or Firefox, disabling browser extensions that could affect audio, and checking the selected audio device and its settings. Its general audio guidance says the service is optimized for a 48,000 Hz (48 kHz) sample rate. These checks are more relevant when the issue involves browser or device audio than when a prerecorded file itself is out of sync.
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
Check frame-rate guidance without changing settings blindly
YouTube lists 24, 25, 30, 48, 50, and 60 FPS among its preferred frame rates for uploads. StreamYard’s cited prerecorded-video encoding guidance specifically recommends constant 30 fps. For this workflow, use StreamYard’s recommended constant-30-fps setting as the initial re-encoding test rather than treating YouTube’s broader list as a promise that any export will resolve sync trouble.
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Troubleshoot the result before scheduling another full stream
- The new file is still out of sync locally: the problem remains in the file or its edit/export. Correct the tracks in editing software, then export and check again.
- The new file plays in sync locally, but the StreamYard output does not: confirm that you uploaded the corrected export, then test a short segment with the recommended encoding settings.
- The StreamYard output seems fine, but YouTube playback does not: compare playback on another device or player and check whether the audio and video track durations match.
- The problem occurs only in one browser or device: try another playback environment and check browser extensions, audio-device selection, and device settings.
- The offset changes between the beginning and end: record the approximate offset at both points; a growing difference is useful to report when asking for help.
If the issue persists, collect the original file’s codec, frame rate, and audio details; whether it is out of sync locally; the approximate offset at the beginning and end; the YouTube playback device and browser; and whether another player shows the same symptom. These are useful diagnostic details, not a published official escalation checklist for this specific case.
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.
Or let it run in the cloud
If your goal is to keep an uploaded video running as a 24/7 YouTube stream, StreamNeo is a separate cloud service—not a repair for an already out-of-sync file. Upload your video, add your YouTube stream key, and go live. Nothing has to stay on at home; videos stream as uploaded at any quality up to 4K 60fps for one flat price per slot, and StreamNeo automatically recovers if YouTube drops the stream. The first day is free with no card. Monthly: $9.99 per month. See StreamNeo or start the free day.
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
- 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
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