Black magic 2.5K outdoor weird flicker

Hello, i just bought a BM, and started filming a movie with it. I am from Uruguay (south america) and i am filming here. I am aware of 24 frames and 50Hz issues, so im doing it at 25 fps. Everything was going perfect but today when i was checking the data i saw on a shot that at some points the light would flicker. The only light on top of the sun (that was coming up) was tugsten 650W from the left. Here is the footage (a proxy in 720p from the original 2K)
Sorry for my English but it is not my native languaje.
Thank you for the responses.

Can't post the link :/

You could also shoot at 24 fps, but in both framerates you need to set the correct shutter angles to avoid flicker. What angle were you shooting at? In 50 Hz countries you should either use 24 fps @ 172.8° or 25 fps @ 180° to match the mains frequency.

dropbox.com/s/4yzxuhih9ae58mu/V1-0002_Tan-fragil_1_2013-11-23_0655_C0002.mov

I was shooting at 25 fps and 172.8 shutter. I know it isn't correct but i also shoot footage indoors with fluorescent light and everything worked fine. The thing was outdoors.

this does not look like normal "flicker". As far as I can see from your footage it appears only once a while - it is something different.

yeah, that looks very odd to me indeed. I would contact BM support and show them that footage. You might need a repair.

I know right? what could it be?
Thanks for your replies guys (:

I am curious about this as well. I watched the footage and it is very sporatic and not cyclical like I have seen in other footage with lighting frequency issues. The background doesn't show any shadows like a cloud moving in front of the sun but the effect does look more like something going past the lighting because it doesn't happen in a regular pattern.

yeah, that looks very odd to me indeed. I would contact BM support and show them that footage. You might need a repair.

Hmm, okay then, i will write them an email.
Thank you

Also agree, this is no "flicker" from wrong framerate / shutter angle (btw: in 50 Hz land you can shoot 25 fps at any angle, shouldn't be a problem. But if you _want_ to shoot 24 fps, it's also ok, at 172.8°).

This looks like something completely different, almost like the exposure automatics from consumer cameras...

Also agree, this is no "flicker" from wrong framerate / shutter angle (btw: in 50 Hz land you can shoot 25 fps at any angle, shouldn't be a problem. But if you _want_ to shoot 24 fps, it's also ok, at 172.8°).

This looks like something completely different, almost like the exposure automatics from consumer cameras...

The funny thing is that it only happened in that scene, i filmed yesterday twelve hours and everything was alright. Weird, i guess i will have to shoot it again.

If it's only happened once, chances are that it has nothing to do with your camera at all - cross my fingers

How did you process the footage?

Did you use Adobe Camera Raw by any chance?

How did you process the footage?

Did you use Adobe Camera Raw by any chance?

That was also my first thought.

How did you process the footage?

Did you use Adobe Camera Raw by any chance?

No, just did the proxy with da vinci resolve.
Anyways i think i saw it on the camera lcd while shooting it.

I had the same problem and sent the camera back to the supplier, still waiting to hear about the issue, seemed to be worse for me when I was shooting motion that flickered in the scene, i.e. plants waving in the wind , but only when shooting RAW, ProRes was fine! I tried processing the footage in Resolve but the flickering was present in the recording. I'm starting to think it could be a lens issue with the large crop factor on the EF fitting, too much light bouncing around the optics inside the lens and causing flashing across the sensor? I've come across similar situations when filming water with bright sun light reflecting back through the lens.

I had the same problem and sent the camera back to the supplier, still waiting to hear about the issue, seemed to be worse for me when I was shooting motion that flickered in the scene, i.e. plants waving in the wind , but only when shooting RAW, ProRes was fine! I tried processing the footage in Resolve but the flickering was present in the recording. I'm starting to think it could be a lens issue with the large crop factor on the EF fitting, too much light bouncing around the optics inside the lens and causing flashing across the sensor? I've come across similar situations when filming water with bright sun light reflecting back through the lens.

Well i shot that with a 14mm red ring Canon, 2.8 exposure.

Anyway, thinking about what might have caused this i remembered that when i was shooting, the director's monitor was plugged and wasn't connected to ground. The monitor was like a bit charged and it transmitted to the camera via Sdi. I felt the camera itself was charged. It went off eventually (when we connected the monitor to ground) but who knows, maybe it has something to do with this?