Move the sound into place.
Adjust audio timing with a positive delay or a negative offset while preparing your video output.
Free account · Local uploads · Background processingAudio delay. From source to download.
- 01
Upload your source
Sign in and upload a local file. Inspection checks the streams and duration.
- 02
Adjust the operation
The relevant settings section opens after inspection. Review the starting values below.
- 03
Preview and review
Render a short processed preview where applicable, then save and review the full task.
- 04
Convert and download
Follow background processing and download the validated output.
Audio delay settings
Choose the operation here and it stays selected through registration or sign-in. Upload and inspect your source to open its settings. Starting values are editable; check them against your file before submitting.
Audio offset
−3600 to +3600 seconds; entry starts at +0.5 seconds.
Audio source
Applies to every selected audio track.
Duration policy
Choose whether to trim, pad or stop at the shortest track.
What to check before exporting
A positive offset inserts leading silence; a negative offset skips the beginning of the sound. One shared offset cannot repair drift that grows over time or set a different delay for every track.
Choose a compatible output profile and review the source streams, selected range and final settings. Processing uses structured controls, and incompatible combinations are rejected before queueing. Download the requested result when final validation completes.
A real workspace. A result you can inspect.
This actual product screenshot shows source playback, range selection, an uploaded-audio area and encoding settings. It illustrates the shared converter; your operation opens its own relevant controls after inspection.
A processed preview creates a separate short task. It covers the first ten seconds of your range at up to 360p in a compatible format. Image and subtitle exports still need inspection of the requested final download.
Explore the Media Converter overview →
Questions about this workflow
Does the offset change audio speed?
No. Use speed or tempo controls for duration changes; offset shifts the starting alignment.
Can I close the tab while processing?
Yes. Submitted conversion tasks run in the background. Return to your account to check progress and download results before the retention period ends.
What are the upload and storage limits?
Current source limits are 2 GiB and two hours per file. Files have a 72-hour retention period; task, collection and resource limits also apply. The workspace shows the applicable limits. Free and Pro currently share feature access.
Keep working with your media.
Replace video audio
Replace the sound in a video with an uploaded audio file. Choose how different durations should behave, preview the combination and export your new soundtrack.
Change video speed
Speed up or slow down video from 0.25× to 4× with matching audio timing. Preview the pace and export the selected range as a new video.