Skip to main content
sync-3, from sync., matches the mouth in a video or a still image to an audio clip, such as a line of dialogue. Choose it in the video generator.

​
What you give it

Add two references:
  • A video (MP4 or MOV, up to 30 fps) or a still image (JPEG or PNG) of the person.
  • An audio clip (MP3, WAV, M4A, OGG or FLAC) from half a second to 10 minutes long.

​
Output settings

The result is an MP4 at the same frame rate as your video. A still image becomes a 25 fps video. When the video and audio are different lengths, Length mismatch chooses what happens:
  • Bounce video to the audio: plays the video forward and back. The default.
  • Loop video to the audio
  • Stop at the shorter clip
  • Retime video to the audio: speeds up or slows down the video.
  • Keep the whole video, silent past the audio

​
Cost

sync-3 is priced per frame of the result, so a longer result, or one at a higher frame rate, costs more. A 5-second result at 25 fps, such as one made from a still image, costs about $0.83. Generate shows the estimate once both references are added. Prices are as of October 28, 2026. Make a speech clip to lip-sync with Eleven v4.