I have a simpe animation scene with a camera tracked to a path, but the motion of camera is too fast, it completes the path always in 100 frames. I’ve set pathlenght to a higher level but that doesn’t help. How can I fix this?
ps. Sorry my bad english… 
Select the curve and open the IPO window and choose ‘Path’ from the drop down, may be on ‘Object’ by default, least mine is. 
Ctrl+Click at the frame you want the camera to start following, make sure Vertex Y: is at 0. Then Ctrl+Click again at the frame you want the camera to complete the path, only this time make sure Vertex Y: is at 1.
Make sense?
Edit: May also be useful to know that you can cause the camera to pause on the path by straightening out the IPO curve somewhere.
Example: First IPO vertex is X:1, Y:0, so the camera starts following the path at frame 1. Second IPO vertex is X:25, Y:.5. Third vertex is X:75, Y:.5. This causes the camera to stop half way through the path for 50 frames. Last vertex X:100, Y:1, which causes the camera to complete the path over 25 frames.
Maybe that’s confusing, heh.
There’s a tracking tutorial at http://www.deviantart.com/deviation/24319408/. It’s neat and it has got an example .blend.
Thanks! Elysiun is a great forum, you can get help very quickly. 