Magic Lantern enables shooting RAW on the 550D. My workflow:
• Shoot (I used a Transcend 32GB Class 10 card, maxed out on 200 frames)
• Copy RAW files and convert them with raw2dng (see sources)
• Import DNG-sequences in After Effects
• Grade
• Export

Magic Lantern Build:
mediafire.com/download/ml5w13p2nxvja7a/ML_550D_June_26_2013_Update.zip

Magic Lantern T2i / 550D RAW shooting thread:
magiclantern.fm/forum/index.php?topic=5582.0

Magic Lantern raw2dng GUI application:
magiclantern.fm/forum/index.php?topic=5508.0

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