Their software is free. Which means they have complications trying to incorporate certain licensed components into their product, those that are traditionally handed by a revenue sharing agreement on the sale of the product. When there is no revenue in the "sale" or distribution of a product that means some other non-traditional license needs to be agreed upon for the revenue share expecting 3rd party. Many, many licensing based business models do not afford the added expense of attorneys for custom license agreements, so they are simply refused. Therefore, free software often has to use nontraditional and custom licensing agreements or agree to some prior licensing business model approved method of paying them without them having to create a custom license enforcement mechanism for various clients. The free yet ad revenue supported game type software fits into an easily policed revenue stream a revenue share expecting 3rd party can be expected to accept. But BlackMagic's software is both free and not ad supported, so where is there revenue? Some share of the BlackMagic Cloud revenue? That'd be a custom agreement.
There is no limitation for CinemaDNG support. It is an open standard that requires no licensing fee. There is plenty of both free and commercial software supporting it. There are cameras supporting it. The patent under discussion doesn’t prevent BM from implementing it.
Furthermore, BM’s software is not free. It is a commercial suite that currently costs $300 (an inexpensive price point, likely subsidized by selling $xxx–$xxxxx hardware controllers without which Resolve is moderately painful to use). They do offer at no cost a limited version where certain features spawn a “please buy” pop-up; in return for that limited version they collect plenty of personal data including your full name, email, phone number and the company you work for. I know this all because I have in fact used Resolve (frankly it’s been somewhat buggy on macOS though), have you?
If so, you should probably know that they have in fact incorporated support for CinemaDNG into Resolve, including the free version, but your comment doesn’t seem to acknowledge that.
