November 13, 2026
How to sync an AI-generated video with original audio?
Upload the video. In Genjutsu AI the download keeps the original audio and the timing of that take. The song stays the song, and the dance stays on the beat that was filmed. A photo replaces each person you choose. The camera and the cuts stay. The download is 720p. You do not line the tracks up afterward, and you do not write a prompt.
The picture stays on the song
If the filmed dancer raises an arm at the three-second mark, the new person follows that same count. Keeping the music is not enough on its own. The steps have to stay on the timestamps from the file you uploaded. Genjutsu AI uses that file for both the sound and the movement.
- The song
- Music, vocals, and sound effects stay from the file you uploaded.
- The start
- The clip starts with that file. The sound is not shifted later.
- The beat
- Steps, arms, and turns stay on the counts that were filmed.
- The length
- The scene keeps the length of the take, up to 15 seconds.
- The camera
- Movement and cuts stay, so the picture and the song still match.
- The people
- Photos replace the people. The timing of the take stays.
The song keeps its tempo
There is no control to stretch the music, change its pitch, or swap in a different track. A scene longer than 15 seconds cannot be generated. A fast move can sit a little off for a moment. The useful result is the same song and the same recognizable dance, with your photos in the frame.
Use a clip you can upload
Drop in mp4, mov, or webm, up to 80MB. Ten credits cover every 15 seconds. Keeping the sound does not give you a new license to the music. Use a video you have the right to upload, including the song already in it. A photo of someone else needs their permission.
What it costs
The first order is $6.90 and covers one video up to 15 seconds. After that, the Starter Pack is $9.99. The price shows before you generate. A failed generation returns its credits.
Keep the beat on a clip you have
Sign in, drop the video, and add a photo for each person you want to replace. Finished videos stay on the account.