What is "Timebase" ?

[gg44078459]

This screenshot:

I have two questions:

1、What is "Timebase" ?

2、What are the values 10, 12, 12.5, 15, 23.976 used for?

[Ann Bens]

The framerate the timeline is set.

Those numbers are all framerates.

Guessing you are just starting out with video editing?

Start here https://helpx.adobe.com/premiere-pro/user-guide.html as this basic video editing.

Beware Premiere Pro has a steeeeeeeeep learning curve.

You need to do some homework wiki:

https://en.wiktionary.org/wiki/timebase#English

https://en.wikipedia.org/wiki/Frame_rate