Hey John,
I personally would always export as AVI in Standard Definition if you want the highest quality, I know everyone in the industry loves Quicktime but I’ve never liked it. MPEG2 if using HD.
Make sure that when you are setting your export settings that you select the “progressive” setting not the interlaced since you shot it at 24p. (I think you’ll have that option).
Also of course make sure you select the AVI Widescreen option as well. With these settings you should not be getting black bars.
Some older SD cameras have a letter box setting that records the black bars right into your footage, it may look like 16:9 in the view finder but it’s actually a 4:3 with the widescreen image centered in that. You would see this in your editing window though if this were the case. So if the footage you are editing has no black bars it’s just a matter of selecting the correct export settings.
Hope this helps.
Danny Winn
youtube.com/DannyWinnVideo