Provide Video and New Audio
Upload the picture source and the separate track that should replace its sound.
Replace Audio in Video
Upload a video and a replacement audio track to exchange the original sound. The Pexo AI video agent follows your full-replacement and alignment instructions, positions the new track, and presents the result for review.
Video and replacement audio
Upload Both Source Files
Add the video, the new audio track, and instructions for its start point and ending.
State that the original audio should be fully replaced and explain how the new track should align.
What it is
Exchange the Original Soundtrack for New Audio
Replace Audio in Video removes or mutes the original track and attaches a separate audio recording to the same picture.
The task is full replacement, not mixing. Your instructions determine the new track position and how to handle a duration difference.
Confirm Alignment and Ending
Describe where the new track should begin and what should happen if its duration differs.
Review the Resulting Timing
Check the first cue, later picture changes, and the way the new track ends.
How it works
Replace the Video Soundtrack in 3 Steps
Provide both files, define the alignment rule, and review the video with only the replacement track.
Upload the Video and New Track
Add the source video and the audio recording that should become its soundtrack.
Set the Replacement Alignment
Tell the Agent to remove the original sound and specify the start point for the new track.
Review Timing and Duration
Check whether the replacement begins at the intended cue and ends according to your instructions.
Agent decisions
Decisions Behind a Full Audio Replacement
The Agent follows the replacement, positioning, and duration instructions while presenting the picture for review.
Original-Track Removal
Removes or mutes the source soundtrack according to the full-replacement request.
Replacement-Track Alignment
Positions the new audio at the cue or timeline point you identify.
Duration Handling
Follows your instruction to trim or position the new track when the two sources have different lengths.
Audio and Picture Review
Presents the resulting video so you can check alignment and ending behavior.
Common questions
Replace Audio in Video FAQ
Does the original audio remain after replacement?
No. A full replacement removes or mutes the original track so the result uses the new audio.
How do I define where the new audio starts?
Identify a picture cue, spoken moment, or timeline position and explain where the replacement should begin.
What if the video and audio have different durations?
Specify whether the new track should be trimmed, positioned within the video, or handled another way at the ending.
What should I check in the replacement result?
Review the opening cue, synchronization at important picture moments, and the way audio and video end.
How is replacement different from mixing audio?
Replacement removes the original soundtrack; mixing keeps it and layers additional audio alongside it.
Start with both source files
Give Your Video a New Soundtrack
Upload the video and replacement audio, describe their alignment, and review the new result.