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[size=14.6667px]The conversion software - both Cinelight (Mac) and camera exporter (PC) appears to have a major flaw.

The "Warp Rectilinear" feature, which seems to be designed to compensate the
fisheye distortion, is always baked in when you convert the footage into DNG files.
So all the RAW files seem to be much distorted especially in the corners.

See the following screen shots.

1. Exported (converted) DNG file (the corners are distorted and the frame is cropped)


2. Cinelight Preview with Warp Rectilinear Disabled (original footage)


3. Cinelight Preview with Warp Rectilinear Enabled (same as DNG file)



Cinelight version : 0.9.26 (2016/05/30)
Camera Exporter : (2016/03/18)

Is there anyone with earlier versions that don't have this issue?

It looks like you can export into TIFF files or compressed formats and enable "apply calibrations"
with "Warp Rectilinear" disabled to work around a bit, but it's not the same as RAW output.
The dynamic range of DNG files are far superior to the rest.

#

Unfortunately the images did not come through, could you happen to repost them?

Here are the links to the images.

1. Exported (Converted) DNG File (Distorted Corners)


2. Cinelight Preview with Warp Rectilinear Disabled (Original Footage)


3. Cinelight Preview with Warp Rectilinear Enabled (Distorted)


The Camera Exporter shows the same problem.

harkblee Posted at 2016-10-25 02:20
Here are the links to the images.

1. Exported (Converted) DNG File (Distorted Corners)

harkblee. The reason why you can see them with the lens distortion on is because you are viewing them in LR. LR by default removes the lens distortion as it's part of the MFT "thing"

Open them in preview and they will be normal.

iSkyUnmannedSys Posted at 2016-10-25 04:09
harkblee. The reason why you can see them with the lens distortion on is because you are viewing t ...

Thanks a lot for the help, iSkyUnmannedSys.

Yes, I got to figure out that this indeed was a MFT thing, and DJI was sloppy (or generous) enough to
not apply "built-in lens corrections" in the Proxy footage.

So the preview and the actual DNG files look quite DIFFERENT.

The distortion corrections are built in for the DNG format and cannot be disabled in both Lightroom or
Adobe Camera Raw. What's funny is when you directly import the DNG files into Premiere, you don't see
the corrections applied anymore.

My question now is, is there any chance I can process these RAW files with the corrections off in
Adobe Camera Raw or Lightroom. The grading options in Premiere look quite limited to what I can
do in these specialized photo-specific platforms.

Again, thanks a lot for the reply!

harkblee Posted at 2016-10-25 08:51
Thanks a lot for the help, iSkyUnmannedSys.

Yes, I got to figure out that this indeed was a MFT  ...

It's actually baked into the MFT format, will do the same if it was a JPG. I do believe you can turn the MFT lens correction in LR, you'll have to look on Abobe's site.

What are you actually doing with the DNG stacks? Why are you using LR for video?

iSkyUnmannedSys Posted at 2016-10-25 23:52
It's actually baked into the MFT format, will do the same if it was a JPG. I do believe you can tur ...

Both ACR (Adobe Camera Raw) and LR offer advanced features to control the imagery and therefore
gives more freedom. Applying linear graduated filters / local dodge and burn using elliptical filters /
accurate color corrections / local contrast control (clarity) and so on.

For some footage, I develop the DNG files into two different TIFF files to emulate exposure bracketing
and do batch HDR to take full advantage of the dynamic range.

For one, how do you even accurately control the color temperature of the footage? Is there something
that you would recommend? Thanks a lot for the kind reply!

harkblee Posted at 2016-10-27 02:12
Both ACR (Adobe Camera Raw) and LR offer advanced features to control the imagery and therefore
gi ...

So just to confirm you are using LR or ACR to adjust the DNG before you convert them to a video format?

I'm just trying to understand what you are doing with the files as your final output.