Preparing the footage

Two minutes of work that decide most of the result. Copy the footage so that every device has its own folder.

The rules

A folder for every camera. That is how each camera lands on its own track.
The recorder separately. Its own folder for every recorder. Inside it the takes can sit any way they like.
One shoot in one folder. The camera and recorder folders inside the shoot folder. You can drop the whole thing.
One shooting day in one folder. If a camera wrote two days onto one card, split them by day: the app warns when it sees more than ten hours in a folder.

For example:

2026-09-02 Concert/
  Cam 1/
  Cam 2/
  GoPro/
  Zoom/

Two things that quietly spoil the result. Do not rename the files: the original camera names carry the order things were shot in. And copy so that the folder structure from the card is preserved, instead of dumping every file into one pile.

What happens if you drop everything into one folder

The app will accept the footage, try to tell the devices apart by itself and sync. But it is better not to: when every camera sits in its own folder it is guaranteed to land on its own track with its own label, and the result is predictable. If the footage is already in one pile, sorting it into folders is faster than untangling the tracks in your editor later.

Split recordings

Cameras and recorders split a long recording into several files by themselves (GoPro by chapters, recorders into 2 or 4 GB pieces). There is nothing to stitch: every piece lands in its place, and the app understands that it is the continuation of the same recording.