When I use the control / click and drag to edit the slow or fast motion the software seems to have a limit as to how much I can alter the video.

In other words, I wanted to take a 30 minute video and speed it up to run in 3 minutes. When I would Ctrl click and drag I could only get the video to speed up to around 15 minutes.

The only work around I could come up with was to save the video, import it and then speed it up again.

Is there a way to extend this limit and use super fast or slow motion?

thanks for your time.