FCP Tech guru needed

Noel Evans

Noel Evans

Mod V3 New and Improved
Staff member
Heres an interesting thing I came across and was wanting some (if possible) a technical reason as to why. Im putting together an edit of a live show shot with the A1 and V1.

The first image is from the A1 with 3-way color correcter applied and mids (for no reason) turned up to max. Does what you would expect. The second image is from the Sony V1 - 3-way cc again with mids turned up to max - any idea why this is the outcome? Footage as captured using aic, this happens to everyclip I captured from the V1 no matter what the scene. Doesnt happen when I turn up the blacks or whites - just mids. I know there is no logical reason to turn mids up like this, but wondering if it was because of something else underlying - that is an issue.

a1.jpg


V1.jpg
 
I agree, but where is the issue? Capturing via AIC or from the cam itself? And noticing it only occurs in the blacks.
 
Looks like underexposure with too much gain on the second frame. And the color correction is amplifying that problem. Show us the same frame from an HDV capture with no color correction or brightening and we can be sure.

Noah
 
Certainly some low exposure areas in the shot, generally speaking I think the exposure is right for the shot though, gain set at 0. No cc. The original shot from the V1 is exactly the same but the mids turned up.

V1C.jpg
 
I don't understand- this still is an uncorrected shot or a shot with the mids turned up? We'd need to see a completely unaltered shot to help you here.
 
ncje said:
Certainly some low exposure areas in the shot, generally speaking I think the exposure is right for the shot though, gain set at 0. No cc. The original shot from the V1 is exactly the same but the mids turned up.
Click to expand...

As it says above. The original shot (strange one), had the mids on 3-way cc turned up and nothing else. This shot is from the same timeline, with no adjustment at all. to reiterate the only thing I did with the first shot was turn mids up full.

I am just trying to figure what may cause thise with the mids. In earlier post - when I turn the blacks or whites at full I get none of this block artifacting. So I am trying to determine if its in the capture via AIC or actually within the cams compression.
 
ncje said:
The original shot (strange one), had the mids on 3-way cc turned up and nothing else. ...only thing I did with the first shot was turn mids up full.
Click to expand...

The first shot is what turning the mids up would exactly do. To explain, I'd need to refer you to the scopes. But it makes total sense. First pics, mids turned all the way up. You don't like it, turn them back down. I'm not following what the question is.
 
Ben, I think you need to read the original post again. The 2 pics are from seperate cameras (A1 for 1st pic and V1 for 2nd) with the exact same effect applied, but with drastically different results. NCJE doesn't seem to want to use this effect, but is trying to understand the drastic difference in results. Sorry if I am misunderstanding the intent, but that is what I got out of it.
 
Kevin Wells said:
Ben, I think you need to read the original post again. The 2 pics are from seperate cameras (A1 for 1st pic and V1 for 2nd) with the exact same effect applied, but with drastically different results. NCJE doesn't seem to want to use this effect, but is trying to understand the drastic difference in results. Sorry if I am misunderstanding the intent, but that is what I got out of it.
Click to expand...

Thanks Kevin you are right on the money. I am trying to understand the underlying cause, so I can be aware of how it occurs, and what that might mean as a limitation when using FCP and the V1 - or is it coming from the camera?
 
That wierd blockiness seems to be somewhat in the footage when viewed in FCP, not as severe, but certainly seems like there is some compression issue or something. Could this be a result of the capture via AIC?

Also notice the bricks in the original two images, good detail to the right of the drummer from the A1 (was a bit closer) then the second v1 image they are pretty much just a smeared mash, so the same question as above.

My current thought is that the AIC capture is compressing the image in a strange manner causing these issues.
 
Last edited:
AIC will not do anything to your image. It doesn't do anything to effect image quality. I've to a consulting client who uses it a lot now and neither of us have ever seen any problems.
 
Thanks for the reinforcement Ben I thought I was going crazy. Also that second image with the mids turned up on the V1 happens no matter the capture method I use. Those blocks are actually within the image and can be seen clearly when you isolate parts of the frame and go to 200-400% in FCP. Point of note though these blocks show up ONLY in darker areas of the frame.
 
Last edited:
You must log in or register to reply here.
Back
Top