VLC player has a nifty feature to speed up movies without changing the pitch, so the voices don't sound like chipmunks despite playing at 120-130% normal speed. I'm looking for any software that will allow me to do this to downloaded videos and save them with the higher playback speed preserved. I've tried lowering the frame rate with programs like VirtualDub, but the audio always gets badly out of sync with the video. Any suggestions?