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Ok, just bought this:

http://www.amazon.com/SanDisk-Extreme-Class-Memory-SDSDXPA-032G-AFFP/dp/B007NDL56A

I'll report back on write speed from benchmark and real life test.  #excited

Yoda

When running the bench mar, it goes thru 9 phases.  At each stop it show my Read Speed and Write Speed for each block the test runs on.  Usually the write speeds were 9.1 MB/s, and read speeds around 20 MB/S.

I also wonder (although doubt) if when using Exposure Override is ON, if any of the additional ISO/Aperture/White Balance settings could contribute to buffer over load causing a crash?

Either way, Im a fan of nightly build now, and will download the latest after Im done with work.  Tech by day, Tech by Night, lol.

Sidenote:  If any of you have never used RAW2DNG for Mac, it is an awesome utility and works lightning fast.  Free to obtain.

Sidenote2:  Post grading DNG files in Adobe Lightroom 5 is equally as fast.  Exported in uncompressed TIFF.

Sidenote3:  IF anyone needs help importing/exporting in FCPX, please message me.  I was able to do this fairly easy, and since color grading is already done, the export process with rendering OFF (meaning NO optimized media) was suprisingly efficient and fast.

Sidenote4:  Found some 5DMK2 camera for $800 on ebay.  Shutter life is 350K actuations.  Since the frame size is much better on these cameras, for those who can afford it, it might be a good idea to invest in one since it's full frame, and a fraction of cost of new 6D.

Cheers.

Yoda

Yoda, I just did a quick settings test of 960x540, fps override 23.97 and 16x9 framing. The results were continuous shooting. In your camera scroll to raw video, click the Q button (next to WB) then change the framing. You will see the write speed, in green letters, change at the bottom of the screen. Mine read 960x540 (16x9), in white letters and 20.7 MB/s at 23.97 in green letters.

Read through this thread's 44 pages and you will get answers and be blessed by all the work the Magic Lantern team and others have put into shooting raw!

What card r u using?

My benchmark is running....and the results are consistent thru 5/9 tests so far.

Write speed = 8.9-9.1 MB/s
Read speed = 20-21.1 MB/s

Disappointing to say the least.  From this thread....it sounds like I need something in excess of 20 MB/s.

Anyone use an SDXC card?  Obviously CF won't work.

Cheers again,

Yoda

Scratch my comment on debug.  My auto off was set at 30 seconds.  Terribly embarrassing.

I'll post the results after.

Yoda

Tried the benchmark.  Camera shuts off after a few frames.  Looks like a bug to me.

Did some research....the 550d has a hardware limit of 20mps.  The card I got says it can write up to 30mps, and it's a class 10.

What is the latest build that is stable?  I'm hesitant to grab the last "nightly build".  Can anyone share which build is working for them?  Also, what card they are using?

Also, if you have a theory....please provide some context in terms of being able to me dre the value of your theory.  Otherwise...ur just guessing.  System Engineers like myself have little fanfare for such bullocks.

Cheers,

Yoda

Evening friends.

Note:  Im new to the forum, but not to video/audio production.  If I post something, its because I'm either contributing or I have "searched" and do not have the answer.

That said, I've been following this thread for a while, and decided to cross over to the dark side and grab a dev build for the 550D.

My setup:

Camera:  Rebel T2i, Sandisk 32GB Class 10 card that writes theoretically at 30 mps.
Computer:  2010 Mac Mini dual proc 2.33Ghz, 8GB RAM
Software:  RAW2DNG Utility, Adobe Lightroom 5, FCPX 10.0.0.9, ML build 11174 (noted on the first page of this thread, last entry on the builds section)

So, I was able to "record in RAW", but only at 960x540 at 14 FPS...but it stopped automatically after 10 seconds.   Booooo.....

My question is this:  What settings must I use for the RAW recording module to get 960x540, so I can record continuously at 24FFPS without stopping?

I set the FPS over ride to 14 FPS just to start, using "EXACT FPS" option in the sub menu.  Ideally, I'd like to be able to record 2-3 minutes.

The rest is easy.  I was able to export using RAW2DNG utility, import into Lightroom, and take advantage of all the RAW editing options in Lightroom.  Exporting was just as easy, as well as adjusting in FCPX.

If anyone has answers this this problem, I'd appreciate it.  What I'd like to do to give back, is once I know I can record without stopping, write up a small tutorial on the whole process so folks can follow along, soup-to-nuts, and be able to achieve similar success. 

Im very familiar with the 2.3 ML Stable package, but if we can understand the settings required for RAW....it would be so awesome.

Thanks all.  If anyone has questions on Lightroom 5 or FCPX working with this material, please hit me up.

Cheers,

Yoda
550D
Lenses:  18-55mm IS, 40mm 2.8 USM, EF-L 17-40mm USM f4.0, 50mm f1.4 USM, 50-250mm IS
Software:  FCPX, Logic Pro 9, Adobe Lightroom 5, Motion 5, RAW2DNG, EOS Utility
Hardware:  Rode NT-1A, Mac Mini, Yamaha RX-V3800, Paradigm Studio v5 Towers (biamped), Green Screen