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Scan for outdated or missing drivers - takes under a minuteDriver Scan →Clear out junk files and repair common Windows errorsFree Scan →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →If your prerecorded video’s audio is out of sync on YouTube after using StreamYard, first check the original file locally. Then compare it with the StreamYard output and YouTube playback. This tells you whether the mismatch is in the source, appears later in the workflow, or occurs only in one playback environment. If the source is faulty, check that its audio and video tracks have matching durations, re-encode it using StreamYard’s recommended settings, and test a short segment before scheduling the full stream.
Find where the sync problem begins
Do not assume YouTube or StreamYard caused the mismatch until you have compared the same video at each stage. The available troubleshooting guidance provides ways to isolate the problem, but cannot identify the cause in a particular video without the file and playback details.
- Play the original file locally. Note whether the audio is early or late relative to the picture, and whether the gap stays about the same or grows as the video plays.
- Check the StreamYard prerecorded output. Compare a few of the same moments with the original. If the source is in sync but this version is not, the mismatch appeared somewhere after the source file.
- Check the YouTube version. Compare the same moments again. If the StreamYard output is in sync but YouTube playback is not, check whether the difference also appears in another player or on another device before attributing it to YouTube.
A nearly constant offset and a mismatch that gradually grows are useful observations to report, not diagnoses by themselves. They help narrow down where and how the problem appears.
Check the audio and video track durations
YouTube advises creators to make sure the audio and video tracks have the same duration. If one track is shorter or longer, edit the tracks in video-editing software before uploading. See YouTube’s video format and upload guidance.
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Check the exported file’s track durations, not just the overall file length. If they differ, correct the tracks in your editor, export a new file, and check the new file locally before uploading it.
Re-encode the source using StreamYard’s recommended settings
If the original file is out of sync or its tracks need a clean export, StreamYard’s prerecorded-video optimization guidance recommends using HandBrake to convert the file with these settings. They are recommendations for its prerecorded workflow, not a guaranteed fix for every sync problem. See StreamYard’s prerecorded-stream optimization guide.
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- Container: MP4.
- Video codec: H.264 (x264).
- Frame rate: constant 30 fps.
- Audio codec: AAC.
- Start alignment: enable “Align A/V Start.”
- Web optimization: enable “Web Optimized” or faststart.
- Total bitrate: keep it below 10,000 kbps (10 Mb/s), as specified in StreamYard’s guide.
Use a new export rather than overwriting the original. After conversion, play the export locally and confirm the sync before uploading it to StreamYard.
Upload and test before scheduling the full video
- Upload the corrected or re-encoded file to StreamYard.
- Test a short segment and compare it with the local file, checking both the start and a later point for drift.
- Check the resulting YouTube playback on another device or player if the mismatch appears only there.
- Schedule or run the full video only after the test behaves as expected.
StreamYard’s prerecorded-stream troubleshooting also recommends re-encoding with HandBrake and uploading again for prerecorded-stream lagging or upload problems. See StreamYard’s prerecorded-stream troubleshooting guidance.
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Separate file-sync checks from general audio checks
If the file itself is in sync but you encounter audio trouble while using StreamYard, its general audio guidance suggests trying Chrome or Firefox, disabling extensions that may affect audio, and checking the selected device and its settings. StreamYard says its audio is optimized for 48,000 Hz (48 kHz). These are secondary checks for a prerecorded-file mismatch; the file and track-duration checks are more directly relevant. See StreamYard’s audio-quality troubleshooting guide.
Frame rate: distinguish upload guidance from StreamYard’s preset
StreamYard’s cited prerecorded-video settings call for constant 30 fps. YouTube lists 24, 25, 30, 48, 50, and 60 fps among preferred upload frame rates. These recommendations address different parts of the workflow: when following StreamYard’s optimization preset, use its specified constant 30 fps rather than treating YouTube’s list as a reason to change the export frame rate. YouTube’s listed values are upload guidance, not evidence that a particular frame rate caused the sync issue.
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- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
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If the mismatch persists
Collect details that make the problem reproducible before contacting support or repeating a full stream. StreamYard’s reviewed guidance does not publish a required escalation checklist for this exact case, but the following information can help narrow it down:
- The original file’s container, video and audio codecs, frame rate, and audio sample rate, if known.
- Whether the original file is already out of sync when played locally.
- Whether the offset is present from the start or grows over time; include an approximate offset near the beginning and end.
- Whether the StreamYard output and YouTube version show the same symptom.
- The device, browser, and player used for YouTube playback, and whether another device or player behaves the same way.
- The HandBrake export settings used and whether the re-uploaded test segment changed the symptom.
StreamYard’s current format guidance lists MP4/MOV uploads with H.264 video and AAC audio, with limits depending on plan. Check its current file-format and upload-limit guidance for details rather than relying on older limits.
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Or let it run in the cloud
For a different need—keeping a prerecorded YouTube channel live around the clock rather than fixing sync in a StreamYard file—StreamNeo runs uploaded videos or playlists from the cloud. Upload a recording or build a playlist, add your YouTube stream key, and go live. Your computer and home connection do not have to stay on. Each slot supports the uploaded quality 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. Monthly pricing is $9.99 per month.
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