How to force After Effects to interpret footage at a specific framerate?

Question

I just started using after effects CS4, and created my first video. But if i look at my final (rendered) video, its 2x the speed it was originally. I recorded a 22 second clip, and traced etc. Looked awesome, but after rendering, its only 11 seconds, so 2x speed. Here's the video

The Cam is a Logitech C920 Pro HD Webcam

EDIT

I found whats wrong, but don't know how to fix it. The recorded videos are 15 fps, but AE imports them at 30, how do i change that? Immediatly when i import, its speed up

How can i make it so it goes normal speed?

Answer 1

To answer your edited question:

If your footage is 15fps and After Effects thinks it's 30fps, you need to tell After Effects to re-interpret the footage.
You do this as follows:

1. Open the Project panel (by default on the left of your screen)
2. Right click on your footage and go to Interpret Footage -> Main... as shown below.
3. In the screen that opens up input the desired framerate (15fps in your case) in the textbox next to Conform to framerate. Press OK.

Now After Effects should know that the footage is 15fps.

Answer 2

The first thing I would check is frame rates of the input, the composition and the output. I would also check the render settings on the output to make sure it isn't only rendering 50% of the frames. Check the properties of the input, the properties of the composition and the render settings in the render queue. Let me know if you can't find the problem in one of those places and I'll try to think of some other possible problems.