6D2 "Midsummer" discussion

[names_are_hard]

Discussion for "ML 2025: Midsummer Edition" on the 6D Mark II should go here.  GL&HF everybody

First supported full frame Digic 7!
- shutter count
- intervalometer
- various debug features
- raw video...  sadly not quite

This cam looks a little short on features, with good reason - I tried very hard to get raw video working here, and ran out of time.  My local builds have partially working raw video, but it's not good enough to use (very unreliable, mostly records noise).  Certainly, this camera is capable of it.  But we need to understand the internals more before it is possible.

[javchz]

Amazing work! So glad to see the project still alive!

[Ozlefty]

Add another person keen to see development continue for the 6D Mk II.
Cheers from downunder

[kadushkin90]

Hello, I am having trouble downgrading the firmware on my 6D II. I have version 1.2.0 installed. When I try to install the old firmware, I see the following message: "A firmware version lower than version 1.2.0 is written on the memory card. See the old file and write the new software version."

Does anyone know how to fix the problem?

[Walter Schulz]

Yes, you need fast fingers to overcome cam's firmware protection. It is called "Battery Door Trick, Method B"

Here is a description for 5D3 but it will work with 6D2, too. You have to use fitting firmware files accordingly, of course. Yours are 1.20 and 1.1.1
https://builds.magiclantern.fm/old/5D3-123.html#install -> Installation chapter beginning at "Whatever you do, ...."

And we have a short video showing the steps for 200D.

Timing is essential. You may miss the proper moment. Been there, done that.

[kadushkin90]

Thank you!

Mod intervention: Full quote removed. Please honor forum rules and netiquette! Quote sensible!

[gzhjb]

Internet knows me and brings news to me. I couldn't believe my eyes on what's happening here. I'm so so grateful.

[acleitao]

That's really great news!!!! Happy you could figure it out. I can only imagine how hard it was. Let me ask you something: clean hdmi feed using autofocus works on that build?the focus box on the feed is really anoying lol. Where do I find the git repository... Not a C guy but maybe I can try to help to figure out stuff

[names_are_hard]

Thanks - it was a few years work.

There is no removal of AF box in this build.  The repo is here: https://github.com/reticulatedpines/magiclantern_simplified

[more-_-stars]

Hello,

First of all I want to say just how gratefull I am of your work here. I just installed ML on my 6d2 and I see that it does not have many settings.

One setting that I am looking for in particular is the ability to triger the shutter when I manualy focus. I had this on my 600d and wanted to see if I can bring it to the 6d2 as well.

If you could guide me to where I can find some info on the build process I could try to port that setting myself.

Thanks!

[Walter Schulz]

Trap focus: We tested it on 7D2 and had issues. This is also stated in the announcement. (But I think the part you are looking for worked well).

Use our Discord invite and access General_Development and - for starters - Development_101. Names will give you advice there.

[names_are_hard]

Hi, I'm glad it's working on your cam.  Indeed, this port is quite early and doesn't have many features yet.  Some will be easy to add.  I hope to add several of the simple features to the 4 newly supported cams over the next few months.

The build process is described here: https://github.com/reticulatedpines/magiclantern_simplified/blob/dev/developer_guide/04_00_building_ML.md

It should be easy to build on most Linux distros.  It's possible to build on OSX and Windows WSL, too, shouldn't be much harder.

Do you mean automatically taking a pic when focus lock is gained?  I think the flag for that is FEATURE_TRAP_FOCUS.  You will need to check how the flag changes the code before running code on your cam.  It is possible it will do unsafe things if you blindly enable it (more likely it just won't work).

[more-_-stars]

Yep, the focus trap is the name. I will take a look at the github and discord pages and see if I can learn a thing or two.

If I succeed with any feature I will reply here as well.

Thanks for the info!

[names_are_hard]

Do you have prior experience with C?  If not, you'll need to learn that first (at least some).

[zabdi777]

Hello. First of all I want to thank you for this work, the 6d2 (6D Mark II) is a camera that I love and it would be great to take the next step in video.

That said, I would like to know if there are real possibilities of having ML on this camera, with 4k and 10bits; understanding that RAW is difficult to achieve.

Greetings and thanks for reading.

[names_are_hard]

The 6D2 is a cool cam - small and powerful.  Raw video will be possible on this cam.  We need to understand some EDMAC internals before it works correctly.  When that happens we will likely get lots of fun possibilities on many cams.  The old understanding of EDMAC is fundamentally wrong, and this likely contributes to bugs on all cams.

[Walter Schulz]

Rough calculation for 4k:

Horizontal pixels x vertical pixels x frame rate x bit depth / 8 = Byte/s

3840 x 2160 x 24 x 10 / 8 = 248,832,000

In MiByte/s = 237.3

Let's say we get LJ92 (lossless compression) working with averaged efficiency of 0.6 -> 142 MiByte/s

Taking into consideration cam's card interface is UHS-I: Max. transfer speed according to specs: Around 100 MiByte/s.

Unknown: Will cam be able to provide SD overclocking? Without it:
- 4k can be done with vertical pixel count of 1512 or lower. Aspect ratio 2.54:1.
- Horizontal binning (pseudo-anamorphic) would reduce data stream by factor 3. Check! But this is no true 4k. It would be 4k/3 resolution (horizontal).

[zabdi777]

Do you know an estimated date for said 4k?
My first language is not English, so I got a little lost in the explanation. And excuse my insistence, I am very excited about this project.

Greetings and thanks!

[names_are_hard]

There is no estimated date.  There is not even an estimated date for raw video.