Add Music to Video Online for Free
Add music to video online and download an MP4 with a replacement soundtrack. A short track repeats to the end of the picture. A longer track stops with it.
How to add music to video and download the MP4
- Choose the video, then add the audio file you want to hear.
- Export the video with the new soundtrack. A short track repeats to fill the clip.
- Listen at the start and end to check the music replaces the original sound.
How much of the soundtrack fits a 30-second video?
- 10-second music clip
- Three passes. The track restarts at 10 and 20 seconds.
- 45-second song
- One pass. The first 30 seconds are included and the last 15 are left out.
- 30-second voice-over
- One pass. The narration and the picture finish together.
Can I add music to video without losing speech?
Choose the recording for its picture, then choose the audio file you want the viewer to hear. The export takes its video from the first file and its soundtrack from the second. Speech, room tone and music recorded by the camera are left out. You can add music to video even when the selected clip has no original soundtrack, provided the new audio file contains sound the converter can read.
If you need background music underneath an interview, listen to the selected audio file by itself first. If all you hear is the song, the exported video will also contain only the song. To preserve the interview, prepare a single mix of dialogue and music in an audio editor. Use that completed mix as your replacement track. Lowering the volume of the song alone will not bring the camera recording back into the mix.
How does the music fit the length of the picture?
Playback of the new soundtrack begins at the start of the video. A short track repeats until the picture finishes. A longer track ends with the picture, even if the song continues in its original file. The video keeps its own running time. When you add music to video for a dance, an exercise timer or a title sequence, check the point where the musical phrase should meet an on-screen action.
A repeated track can reveal a gap that was hard to hear in the music player. Silence at the end of the track is followed by any silence at its beginning on every repeat. Headphones make it easier to hear a click or an unexpectedly long pause at that boundary. For a smooth repeat, prepare an audio file with a beginning and ending that fit together, then export again from the original picture.
Prepare the picture and choose where the song starts
Start with a playable video saved on your device. Open the cut you plan to use and look at its first and last shots. A title card added before the action can move every cue in a prepared voice-over. For example, if you add five seconds of titles ahead of a demonstration, an instruction recorded for the original cut will come five seconds early. Adjust the audio or choose the earlier cut before exporting.
For the soundtrack, use an audio file stored on your device. A playlist entry or a web page for a song does not supply a readable audio track. Open the file and listen from its beginning. Look for a spoken introduction, a count-in or a stretch of silence before the music begins. To add music to video starting with a chorus, make an audio copy whose first sample is at the intended entry point, then choose that copy here.
How to check the timing after you add music to video
Check the beginning, a repeat boundary if there is one, and the final few seconds of the downloaded movie. At the beginning, listen for a hard cut into a loud note. At the end, let the picture finish without moving the playhead so you hear how the music stops. If the ending is abrupt, prepare the audio with a fade that lands at the length of the film. A fade at the end of a longer song will never be heard if the video finishes earlier.
Use the same playback volume when comparing two mixes. A louder version can seem clearer for a few seconds even when its peaks sound rough. If an instrument distorts in the audio file before you add music to video, changing the video export will not repair that recording. Start with a clean soundtrack, or adjust its level in the audio project, before comparing the two video copies.
Questions about how to add music to video
Do I need to mute the original video first?
Choose your original movie as the video input and the replacement as the new audio track. Only the sound from the second file is used. Export a separate silent copy first only if you also need a version with no audio track at all.
Can I add music to video starting halfway through a scene?
There is no start-position control on this page. Prepare the audio with silence before its first note if the beginning of the film should stay quiet. Check the total length as well. A replacement file that ends before the picture will repeat from its beginning, including any silence you inserted.
Can I use the New audio track field for narration?
Yes. Select your narration in the audio field and export the movie. Compare a clearly spoken word with the visual action it describes near the beginning and again near the end. A shorter voice track repeats in exactly the same way as a song. Add enough silence at its end if the narration should only play once.
Why can I still hear the camera sound?
Check that you are playing the downloaded MP4 rather than the input preview or an older copy in your photo library. Then play the replacement audio by itself. If the camera sound is part of that mix, it will be present when you add music to video using the same recording.