Nodaro DocsMerge Video & Audio
Add voiceover, music or sound effects to a video. Set each track's volume and start time, and keep, lower or mute the video's own sound.
The Merge Video & Audio node combines a video with one or more audio tracks into one video file. Each track has its own volume and start time, and the video's own sound can stay under the new tracks or be muted. Use it to add a voiceover, background music or sound effects to a video.
When to use it
- Add an AI voiceover to a video.
- Lay background music under a clip.
- Combine speech from Text to Speech with generated clips.
- Add sound effects to a silent generated video.
Quick start
Add the node
Press Tab on the canvas and choose Video › Sound for Video › Merge Video & Audio.
Connect the video and the audio
Wire the video and every audio track into the Media input. The first connected video is the base of the result.
Set the tracks
Open the settings panel. Under Video Source, keep or mute the Original Audio. Under Audio Tracks, set the Vol and the Start of each track.
Run it
Click Run on the node. The video with its new sound appears on the node.
Inputs
| Input | Accepts | What it does |
|---|---|---|
| Media | Video and audio nodes, such as Generate Video, Text to Speech, Generate Music and Upload Audio | The first connected video is the base. Every audio node becomes an audio track. A further video adds its sound as a track, marked as audio extracted from video. |
The output, Video, is the video with the merged sound.
Settings
Video Source
The first connected video. Its own sound is the Original Audio:
| Setting | What it does |
|---|---|
| Original Audio | Keep, the default, keeps the video's own sound under the new tracks. Click the badge to switch to Muted. |
| Vol | The loudness of the original sound, from 0% to 200%. The default is 30%. |
| Role | Tags the original sound as Background (the default), Narration or Effect. |
Audio Tracks
Every connected audio source is a track. The tracks are listed in the order of their start times, and the play button next to a track previews it.
| Setting | What it does |
|---|---|
| Role | Tags the track as Dialogue, Narration, Background or Effect. The default follows the source: speech from Text to Speech is Dialogue, music from Generate Music is Background, and a sound from Text to Audio is Effect. |
| Vol | The loudness of the track, from 0% to 200%. The default is 100%. |
| Start | The point of the video, in seconds, where the track begins. The default is 0. |
Audio that runs past the end of the video stops with the video. Audio that ends before the video leaves silence after it.
Troubleshooting
The run is refused before it starts. Every input must carry real media. If a connection feeds the node something that is not a media file, for example a text output wired into the Media input, the run is refused before any credits are reserved. The message names the node and quotes the value it received.
Tips
- Merge last. Put this node after all the video processing, such as trims, joins and speed changes.
- Replace the sound completely. Mute the Original Audio. You can also strip the sound first with Remove Audio, but it is not required.
- Keep the music under the voice. Lower the Vol of a music track, for example to 40%, so the voiceover stays clear.
- Mix complex soundtracks first. To blend many tracks before you merge them, use Mix Audio.
- Reuse a processed soundtrack. Pull a video's sound out with Extract Audio, process it, then merge it back here.
Frequently asked questions
Related
Mix Audio
Remove Audio
Extract Audio
Text to Speech
Video SFX
Last updated on
Video SFX
Generate sound effects, foley and ambience that follow the action in a video, from an optional prompt. The new sound replaces the video's own audio track.
Extract Audio
Pull the audio track out of a video as a standalone MP3 file, to split it into stems, clean the voice or reuse the soundtrack under another clip. No settings.