RETIMED SLIDESHOW SYNC

Slideshow Audio Sync

Upload an original slideshow-style video and a new narration audio. The system keeps the new audio natural and retimes the slideshow video so the visuals stay aligned with the narration.

1. Upload sourcesUse the original video with its original audio plus the new narration track.

2. Match timingSpeech timestamps are aligned in sentence-sized chunks, with larger block fallback if text matching is weak.

3. Export MP4The video segments are retimed; the new audio is muxed without global speed changes.

ORIGINAL VIDEO

Use the existing slideshow/static-image video with its original narration audio.

NEW AUDIO

This narration stays natural. The system retimes the video instead of speeding up the audio.

Idle

Waiting for the original video and new audio...

Download synced MP4

Best source: slideshow, podcast image video, narrated presentation, or static visual explainers.

Important: this does not retime the new audio. It changes the video segment timing to follow the new narration.

Audio repair: if the new narration contains a clearly repeated sentence or block, the system cuts that duplicate before syncing.

Fallback: if sentence text alignment is weak, the system uses larger timing blocks so the export can still complete.

Limits: there is no fixed video/audio duration limit for this tool. Very large files still depend on available server storage and connection stability.