FCPX doesn’t support DNxHR. It supports DNxHD, but not HR. Submit a feature request to Apple asking them to implement support for HR. Or tell them to open up ProRes encoding on PCs. ☺ I’d be happy with either.
If I get DNxHR I have to run it through compressor or Resolve or Media Encoder to re-encode it to ProRes, so I can use it in FCPX. It’s a huge nuisance and Apple really needs to fix it.
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Michael Hancock
Editor