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[seb138]

Hello,

I was curious to know if anyone had any good way to physically mount the Gemini to an Alexa.  It looks like it comes with some kind of hot shoe adapter, which doesn't seem like it would work well at all.  I'm worried that an Noga arm would not be stable enough, especially when adding and removing media.  I also can't see any threaded holes on the unit, is there only one in the back?   I've worked with other on-board recorders and similar on-camera devices, and I've found that they never mount well onto the camera - they wobble, restrict access to the top handle, and generally get in the way of shooting - and more often than not, I end up just taking them off the camera and not using them. I'm interested in getting a Gemini as an on-board ArriRAW recorder for the Alexa, but if it can't mount well onto the camera, then it might not be worth the extra effort.  I wanted to know if anyone had any recommendations. Thanks

Sebastian Sokolowski

[Dan Keaton]

Dear Sebastian,

The Gemini 4:4:4 comes standard with one 1/4" x 20 Tripod thread, located on the  lower back of the unit.

Any we have some accessories, a black powder coated piece of Aluminum, with two Stainless Steel threaded inserts, one 1/4" x 20 and one 3/8" x 16.

These attach to either or both sides of the Gemini 4:4:4.

Also, the Gemini 4:4:4 only weighs about 1.26 pounds, or around 572 grams. Each SSD weighs 45 grams.

[Robert Tur]

Sorry to belabor the obvious, but .ari files are Arri's algorithmic mathematical expression for recording uncompressed data, therefore, the Geminii 4:4:4's 'math' either works, or it doesn't. Testing can be completed in a matter of minutes.

[Dan Keaton]

Dear Friends,

One of the less complicated parts of recording ARRIRAW is the actual creation of the ".ARI" file. The data is provided by the ARRI camera over T-Link and we place the data into the proper format and then write out the formatted files, one per frame.

I agree that testing if our ".ari" file is in the right format is very easy and can performed quickly.

Of course, we need to support both dual link and 3G streams, which we do.

Then the more complex part is debayering the image in real time, and performing all of the steps to properly display the image.

[Torrance]

Dan,

Any word on arriraw certification?

[Robert Tur]

I never understood how Arri could partner up with the Codex's $60k system, then license Arriraw to Gemini so Codex can be undercut by $52k. Probably why we don't have the Gemini option. Now Blackmagic Design has an uncompressed 4k SSD recorder for $1,995 that can, if it were allowed, record Arriraw. The reality to my mathematical mind, is that the technology is here, capable of doing the job at under 2k.

Blackmagic has on display at their booth, a 2.5k 13-stops of latitude camera that records to an internal uncompressed 12-bit RAW recorder for $2,995 that comes with a full copy of Resolve 9 that normally sells for $995. Both Red's Scarlet and Canon's brand-new and much hyped C-300 are rendered obsolete. Especially with a far better recording system that costs 905 less.

With technology surpassing Prores I think it's important that Arri provide the software code so we can output the full uncompressed data from our camera's SDI outputs, instead of it's limited 1920 x 1080. By next year our camera's recorders WILL be obsolete, leaving us to compete with the under $3,000 camera market.

[Guenter N.]

Robert,
manufacturers of data recorders are allowed to record whatever format they want.
ARRI does not have any involvment in what format a manufacturer chooses to implement.
The ARRI RAW certification only means that the recorder is capable of recording the uncompressed high bit rate, de-bayering and playback of the .ari files.

There are many reasons why some recorders are more expensive and complex because they offer a complete solution from capture through post.

ALEXA outputs ARRI Raw in various options over T-link (HDSDI connectors).
This data is available to anyone who wants to record it.
In a few weeks I am sure the Gemini will do it as well.

[Robert Tur]

Good news.

[adrianjebef]

FYI: The Gemini 444 has been ARRIRAW Certified. I've been using beta firmware with my Gemini to record ARRIRAW for a few weeks and the results are great. If any of you are interested in a cost-effective, no-hassle ARRIRAW workflow the Gemini 444 delivers.