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Took a gamble. did a re-install and it worked don't know what that was all about but all seems good now.

J

this looks similar to an out of sync issue when shooting under florescent light when your voltage is 220 60cycles and your using 48 or 50 shutter.

That was my first thought as the banding is rolling. it's similar to the phasing issue you often get with refresh rates on screens etc or as you say different cycles. takes me back to my film days

The footage is h.264 and i did try varying the shutter speed to no avail.

Banding was still there under a different light source.

To be honest i didn't spend too much time pushing the tests because i didn't know whether it was a sensor issue and none of the usual tests were resolving it. Not to mention when i was bracketing exposure during some tests the images were completely solarised when the lens was wide open so.... um yeah.

I've only just started venturing into the DSLR side of things due to client demand. usually i shoot with Arri Alexa's, Reds or Sony F5's/55's so i'm open to any advice on optimal use of these cameras.

I'm thinking about giving the install another go but obviously cautious.

Only other things i can think of that may have messed up the install was the use of a micro SD in an adaptor but that really shouldn't hurt or maybe i put the wrong files on the card. I put all the files in the nightly build folder on the card. The Autoexec.bin, the ML folder and the .fir file. To be clear i put the files in the 'Magiclantern-Nightly' folder on the card not the 'Magiclantern-Nightly' folder containing the files.

Any Red flags there.

It really looks like some kind of phasing issue to me which means hopefully the sensor is safe to do some more extensive testing with but who knows...

so which nightly build did you use? Provide informative details so the devs can troubleshoot bugs.
There is a reason why its called "bleeding edge" because it offers new features and it comes with risks when you are willing to test these builds.

Yep, right you are. the build was the latest provided from the link at the top of this thread: Latest Build
Built on: 2014-03-17 20:56:54 +1000
Changeset: 48e7ddebc1b9

installed as instructed:

Format card in Camera
Copy files to Card
re insert card to camera and update firmware: Restart Camera.

Here is a quick video of the ensuing result excuse the riveting content:

[TREAD CAREFULLY]

TREAD CAREFULLY

Don't Know about anyone else but I had a horrible experience with this. As soon as I installed i got big greenish banding rolling through my images and a lot of solarisation. Uninstall alone didn't help. I had to Re-install 1.2.3 from Canons site and thank christ it worked because i was freaking out.

If anyone has had this or knows of something i may have done wrong  to cause it then i'm all ears.

J