After Effects BPM Beat-Marker Script by Peter Castler

Produce animations that match your desired BPM using Markers as guides!
For so many years I wanted something like this because there is no quick and easy way to make BPM-matched animations in After Effects.

What and whom is this for?
This is for VJ's who want to create BPM beat-matched animations for specific music genres.
(e.g. 120 BPM House , 140 BPM Dubstep, 170 Drum & Bass, etc.)

How do I use it?
Launch After Effects and open your project.

1. Go to "File" in the top menu and select "Scripts" and then "Run Script File...".
2. Locate and select the script file.
3. The script should now run and you should be able to see its window.
4. If you want to make adjustments to the script, you can open the script file in a text editor, make changes, and then re-run the script in After Effects.

Troubleshooting
If you get this error "Unable to execute script at line 5. null is not an object", it's most likely because you need to have an active (open) composition.
If you just launched After Effects to quickly try and run this script without a project open, I appreciate your enthusiasm but the script needs at least one active composition (with a selected layer) to work. :D

Enjoy!