Blue vertical lines with high ASA

[Teague Kennedy]

Still no response from Red team. I brought up these lines a year ago, and they've gone no where. Still there in build 17. Anyone. Anyone.

 

[Ivan Cortazar]

Still no response from Red team. I brought up these lines a year ago, and they've gone no where. Still there in build 17. Anyone. Anyone.

I agree. It is quite annoying that it is really difficult to push the camara to get a lot of ASA and get more DR without getting these lines. I don't mind the noise if I need to push. It doesn't look that bad, but the lines.. can't deal with it.

It would be great if Red could say something about it, for good or bad so we could get it out of our system. Something like, "we'll work on it on future built" or "forget about it, we won't be able to fix that. It is the way it is"

I love my Red1 and their customer service is amaizing but sometimes I find it a little bit strange how they are very active in some of the details of the camera or the new Epic and Scarlet, and some others issues like sound or this one goes extremely quiet. I really don't mind hearing from Red that this won't improve, but it is nice to know what can we get from our R1 now and possibly in the future.

 

[Charles Angus]

Muffiny, increasing ASA decreases your dynamic range.

If the lines are static, you can just roll some footage with the lens cap on, and subtract it from your real footage in your compositing app.

 

[Ivan Cortazar]

Muffiny, increasing ASA decreases your dynamic range.

If the lines are static, you can just roll some footage with the lens cap on, and subtract it from your real footage in your compositing app.

Maybe I didn't phrase it properly. I know that the camera shoots at 320 ASA, so what I was trying to say was, that if you expose properly at 320 ASA or if because of the situations you have to shoot at few stops under on 320ASA (basically underexposing you footage) if there were no blue lines, you should be able to bring up some shadow detail (whether using curves, contrast or ASA-exposure technique) and in a way are getting more DR with the price of noise, but when you get noise and lines, then you can't go so much into the shadows, therefore losing few usable stops because of those lines.

I don't quite get how that technique would help fix the lines. Could you explain it in more detail? Now I get a dark or blue line; even if I could get the same pattern of lines with the cap on, and then in After effects I subtract that, I wouldn't get the information that wasn't recorded on that part of the frame. Are you talking about creating a Matt of those lines, and then replacing them with some more neutral color?

Thanks for your input.

 

[Charles Angus]

You do get back the information that was recorded in the same place as the line - if you can reproduce a black frame with the lines on it, and subtract it from the footage with the lines on it, the lines will be removed. You will be able to see the information that was always there, but hidden by the blue line.

This is how DSLR cameras do "long exposure noise reduction". To work best, it might be worth it to record ~5 seconds of black, and average the frames to remove any noise. This will better isolate the fixed pattern noise.

 

[Teague Kennedy]

The lines are not static. The problem cannot be solved like that. I also don't mind grain. This vertical line pattern is unbearable and un-useable for any professional work. For low-light or medium-light available light scenarios, you would be better off shooting on ex1 and printing to film than Red 1. No doubt in my mind. I really wish they would solve the issue. We may have to wait for Epic.