Which video editor for Linux has the video speed control effect?

I have so far tried Pitivi and Shotcut, but neither of these seem to have this effect, by which one could speed up or slow down certain segments of a video. Also, Shotcut doesn't even work very well on my system and tends to crash at every opportunity. Unfortunately my bandwidth is limited, so I don't have much of a chance to try out many such video editors. If someone knows one such editor for Linux, I would find such answer very helpful.