Blackmagic Forum

I just had my first real shoot with my camera two days ago and I only just now noticed these sort of pale uniform lines in the bright highlights of the window. The lines are pretty light but I definitely see them there. Just wondering what this might be.

Similar to this? viewtopic.php?f=2&t=8725

No the lines are horizontal and there are lots of them...almost like zebra stripes. They're kind of a pale grey in color.

bztobin wrote:I just had my first real shoot with my camera two days ago and I only just now noticed these sort of pale uniform lines in the bright highlights of the window. The lines are pretty light but I definitely see them there. Just wondering what this might be.

could you share a picture? and possibly a raw file showing the problem?

I shot on prores actually. At 400 iso. I've been trying to get a screenshot up but it says the image is too large. I'll try and shrink them. They are quite feint so I'll darken one of the images. In these shots the lines appear in the windows.

Symptom of debaying?

wow, they are VERY faint...but I see them.

You are definitely on the edge of clipping if that's not already clipped...so I would think that' some sort of distortion from the clipping. Like the black circles we saw before?

When you look at this scene on the BMCC, what is your zebra set too? 100% is that area clipping?

Looks like blinds.

They look like clipped highlights graded down. If you grade down highlights in Prores you'll see all sorts of crap. They're not blinds because the light [upper screen right] is suffering from them too.

Yeah I think the Ebras may have indicated I was clipping. I managed to make the lines go away in post by making the whites brighter. Lost some window detail but better than having weird lines.

bztobin wrote:Yeah I think the Ebras may have indicated I was clipping. I managed to make the lines go away in post by making the whites brighter. Lost some window detail but better than having weird lines.

If it was clipping, then there is no valid data that can be recovered from that area. Trying to recover anything, especially from a compressed source, is bound to introduce artefacts.

What are you using to process your footage?