One video. Another audio choice.
Add an uploaded recording as a separate audio track while retaining selected original tracks in a compatible video container.
Free account · Local uploads · Background processingAdd audio track. 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.
Add audio track 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 source
Original + uploaded audio is selected.
Upload audio
Inspect the additional sound file.
Output container
Use a container capable of keeping your selected tracks.
What to check before exporting
Separate tracks are playback alternatives. They do not automatically play together. Enable mixing for one combined soundtrack; browser playback may expose only one 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
Will this create a voice-over automatically?
No. Supply your own recorded audio. This operation adds that recording to the output.
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.
Mix audio
Mix selected source audio and up to four uploaded audio files into a single output soundtrack.
Audio delay
Adjust audio timing with a positive delay or a negative offset while preparing your video output.