PLEASE READ THROUGH THE FOLLOWING LINK FOR GENERAL RAW VIDEO INFO-http://www.magiclantern.fm/forum/index.php?topic=5520.0
The 600D (T3i) is capable of continuous raw video recording, but on a smaller scale than 5d ii and 5d iii. We're limited to a 21 MB/s sd write speed, even with the top-of-the-line Sandisk 95 MB/s sd card.
All hope is not lost though, seeing that 720p quality is well within our reach. I've had the best results shooting in ntsc 640x480 video mode with the newest build by 1%, recording with continuous frames at 1152x464 (2.50:1), up-rezzed to ~ 1280x512 in post, and 16:9 aspect of 960x540, which also uprezzes nicely. Not sure if it still matters with the newest builds but I leave pic quality on sRaw for a bump in buffer memory. If you accidentally take pics in sRaw and can't get them to open, try Canon's Digital Photo Professional.
As far as which sd card to use, the faster the better. Seems like cards that are 30 MB/s can't quite keep up, so we'll likely have to stick with cards that are AT LEAST 45 MB/s and up. Formatting them as exfat helps with the 4 GB file limit, as well.
I've posted a couple vids in the share your vids forum, and I'll upload some dng's or prores 4444 files if anyone is interested. Drop your suggestions, bug finds, preferred settings, etc in here, and I'll keep this original post updated as new developments come along.
Download various builds here (top is newest)-https://bitbucket.org/OtherOnePercent/tragic-lantern-2.0/downloads
This build is still in testing, PROCEED WITH CAUTION.
Update: The newest build has Dual Iso, ETTR and file manager modules. The nightly 600D build now has raw enabled as well, but some users are reporting corrupt frames.