Vlc ": Rate=2.0" - Where Do I Put This in Command-Line?

I figured out a way to transcode my videos so that they would play at double speed using the GUI as "Convert/Stream" --> "Show More options" and adding :rate=2.0 after :file-caching=300 in the "Edit Options" box. Where exactly do I put this :rate=2.0 when I am transcoding my video using command-line?

For eg:

vlc -vvv "my video.avi" :sout="#transcode{width=320,canvas-height=240,vcodec=mp4v, vb=768, acodec=mp4a, ab=96, channels=2}:std{access=file, mux=mp4, url=myvideo.mp4}" vlc:quit

Where do I put :rate=2.0 ??

I am doing this so that I can use a bash script to batch-convert video lectures so that I can play them on my ipod at double speed.