If you export “Current Settings” you create a QT that is pro-rez. Your HD timeline.
You can output Quicktime Conversions and select any other format if you want to create a different file. you best bet is always to export “current settings” ref file & then drop that file into a compression software like “compressor” and create an alt file, IE; h.264, flash, mov, wmv, ect.
Look up “Episode” compression software – it does it all.
Chris Tompkins
Video Atlanta