Lip Sync AI for New Lines in the Same Video

It updates the visible mouth movement so an existing speaker appears to say the new speech you provide. It keeps the original clip structure instead of generating a new avatar, restyling the footage, or replacing the whole video.

Yes. Use Text to Speech when you want to type a line and test it quickly. Upload audio when you already have a voiceover, translated dub, or approved narration that should drive the mouth movement.

Use a short clip with one clearly visible speaker. Near-frontal faces, steady framing, and an uncovered mouth usually give the model more usable information than side profiles, fast cuts, or heavy motion.

Yes, when you provide the translated text or audio. Lip Sync AI handles the mouth-sync part of the dubbed version; it is not a full automatic video translation tool.

No. Lip Sync AI starts from an existing talking video. Avatar and talking photo tools create or animate a speaker from a different kind of source, while this page edits the mouth movement in footage you already have.

Upload an MP4 or MOV source video between 5 and 10 seconds, up to 100MB. If you use audio instead of Text to Speech, upload an MP3, WAV, M4A, or AAC file up to 5MB.

The usual causes are a line that is too long, audio that moves too fast, a speaker who turns away from camera, or a mouth that is hidden. Check the source clip and pacing before rewriting the whole script.

Often, no. If the original take already has the right framing, expression, and mouth visibility, lip sync can update a short spoken segment without filming it again. If the new line is much longer or the face is hard to see, reshooting may still be cleaner.