Quality loss when exporting footage from 650D

Hi there! I just got back from Nicaragua where I shot a wedding for a friend of mine. I just started using FCE (used Pro in college) and noticed that after importing my clips from my Canon T4i (650D) the clips would constantly need rerendering if I changed anything that normally wouldn't require a render.
The main issue is that after exporting the video, it's a 21.6 GB file that is pixelated and a major downgrade from the actual files themselves. I've also noticed that when I play around with the setting, the video size says it's currently at 597 x 498. Is there any way to fix this issue without having to reedit? If not, how can I avoid this in the future?
Thank you in advance.

Honestly, FCE is not the best app to edit video recorded on DSLRs.
If you want to edit the material with it, you must first convert the files from their Canon native format to AIC before you bring them into FCE.
If you decide to change apps, look into either Premiere Pro if you want to stay with an editing paradigm that is familier or go with Final Cut X if you want to work within the iMovie paradigm.
Good luck,
x

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Quality loss when exporting footage from 650D

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