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How do I add music to an existing video?
Select song to an existing video in a timeline editor by importing the footage and audio, placing them together and adjusting the soundtrack before export. AI Music.Video's Create workflow generates visuals from music. It does not currently offer a general upload-and-replace-soundtrack editor for an arbitrary finished video.
By AI Music.Video · Updated:
Before you start
Keep the original video and a music file you can use. Decide whether the video's speech or ambient sound should remain audible. If you need an original track, follow the AI song generator guide and download the approved recording first.
Steps
- Open a video editor and import the footage and track. Create a timeline with the intended frame shape and place the video first. Use the editing software checklist if you need to choose an editor.
- Place the music on an audio track and align its start with the intended visual moment. Listen to the opening and ending. Trim the music at a sensible phrase boundary rather than cutting off a word or a sustained note without review.
- Balance the music against any speech or original sound. If the footage already contains the same song, mute the duplicate source unless it serves a deliberate purpose. Two slightly offset copies can produce an echo or an unpleasant change in tone.
- Preview the full timeline, then export and play the downloaded file separately. Follow the export review checklist for audio, picture and timing. Keep the editor project so you can adjust levels without rebuilding the video.
Worked example
For a behind-the-scenes clip, let the music establish the opening, reduce it while the speaker explains a decision, then bring it back for the finished shot. Make those level changes in the audio track controls. Do not ask a new music generation to solve a mixing problem in an existing video.
Check the result
You should have one video file with the intended soundtrack and clear speech where needed. If your real goal is new visuals that follow the song, use the music video animation workflow instead of treating the existing footage as mandatory.
If something goes wrong
If the export is silent, check whether the music track is muted or excluded from export. If the sound clips, lower the combined level and review again. If the music is shorter than the scene, use a planned edit or the song extension workflow, then inspect the join before exporting.