# ffmpeg merge streams

1. Write an ffmpeg input configuration file `list.txt` of the form:

```txt
file '<input-1>'
file '<input-2>'
file '<input-3>'
...
```

2. Run `ffmpeg -f concat -safe 0 -i list.txt -c copy <output>`

ffmpeg has a quirk in which it rejects perfectly ordinary input paths by default, requiring the boilerplate `-safe 0` option to work with real world file paths.