# Merge MP4 Files

> Add, remove, reorder, and merge multiple MP4 clips into one video.

Canonical URL: https://soulnio.com/merge-mp4-files

## How it works

Add at least two MP4 files, arrange them in the desired order, and start the merge. Clips are normalized before joining.

## Result

One MP4 with consistent H.264 video and AAC audio, using the first clip as the output canvas size.

## Limitations

Clips are re-encoded so files with different codecs, dimensions, or audio layouts can play consistently. Processing time grows with total duration.

## Frequently asked questions

### Can MP4 files with different resolutions be merged?

Yes. Each clip is fitted to the first clip’s canvas before the files are joined.

### Can clips be reordered or removed?

Yes. Use the controls in the clip list before starting the merge.