Trying to use Prime in .cr2 dual iso files

[Basosa]

Hi Everyone,

I am would like to use Prime noise reduction from DxO software with dual iso.CR2. I try prime reduction in DxO>export to Lightroom (with the pluging) in .DNG file>Export in Lightroom plugin cr2hdr v3.0 BETA3.
I have the following message: AglmportSession.addOnePhotoToLibrary: failed to import photo.
Is someone know if it could be possible to use that workflow to denois dual iso; I’m on 7D + canon 400mm f.4 and even with 100/800 dual iso, sometimes is very noisy, it would be great to be able to use Prime programme.

Thank you in advance and sorry for my poor English.

[Audionut]

Last I heard, that DxO noise reduction only works with original camera files.

Dual ISO DNG is not original.

[Basosa]

Yes this why I try firs to denoise with the original CR2 dual iso file then export in DNG in LR and finally export with cr2hdr. In this way I can denoise but cr2hdr can’t convert dual iso. But maybe cr2hdr can be coded to be able to conver an DNG Prime denoise dual iso file?

[a1ex]

This research was done for this purpose: http://www.magiclantern.fm/forum/index.php?topic=10895

However, to my knowledge, there's no public code to create a CR2 yet (but you could ask @Marsblessed).