That's something at least, but I have an easier way to do that outside of Avidemux. What I really want is for the GUI to add the option to encode to 640 kb/s. It's there up to 384, and if it can do it via command line, I don't see why that can't be added. Hopefully it does in an upcoming version. I'm sure I'm not the only one who has been waiting for over a year for that feature.