[Ole Slyngstad]

Thanks for your reply, Juan. I would presume that too, but I’ve just found this info from ARRIs website on Alexa’s technical specs:

https://www.arri.com/camera/digital_cameras/cameras/camera_details/?product=8&subsection=technical_data&cHash=177d18e5da12e11481110e620f560c80

Far down on the page under In-camera Recording it says: “All codecs record legal range video with embedded audio, timecode and metadata. […] Codec: ProRes 4444.”

From reading this I believe that it would actually be right to tell Resolve to interpret the Alexa clips as video instead of data, since the Alexa codec records “legal video”? The selection between these two options for Alexa’s footage has troubled me, as I periodically get better grading results with selecting video level inputs rather than data.

But this would also mean that Resolve inherently interprets these files the wrong way and therefore preforms an unnecessary stage of legalization on the footage. One of the world’s leading grading systems should be able to import Alexa’s footage (one of the most widely used digital cinema cameras available) in a proper way.

[Ole Slyngstad]

Hi! Thanks for good info.

Yeah, it’s a small let down that the JPEG 2000’s from Resolve are only profile 2 and not DCI compliant. It would’ve been a lot easier if they could be used directly in openDCP without re-encoding.

I appreciate the work you’re doing on openDCP. I really like the app as it works great. As an independent filmmaker it’s invaluable to have this free open-source solution for creating DCPs for film festivals.

The biggest challenge is of course the task of properly making the material DCDM, as I want it to be DCDM before I hit any DCP creation tool (like openDCP) because that way I will have more accurate control over the final results. I believe you wrote in another thread that this is the proper workflow.

What software would you consider the best in terms image quality (regardless of price) when converting material into DCDM. I’m not into hardware DCP creation tools and JPEG 2000 encoders (like Clipster or Barco). Someone mentioned that Scratch does a good job with XYZ and gamma conversions.