I am trying to use a Read node for one DNG file, to write to another DNG file.
I have tried connecting a Read node of a DNG photo I took, to a Write node.
My DNG was created with a Canon Powershot S3 IS running CHDK (Canon Hack Development Kit).
I have also tried writing a DNG from a Read node of other RAW digital files, including sample DNGs from KenRockwell.com, and RawSamples.ch, and I have tried writing to other RAW filetypes, such as CR2 and CRW.
When I render from the Write to RAW node, I get an error:
Write1 error: Cannot create output file /path/to/file.dng
Writing to EXR works, and seems to not lose visual information in the resulting file, but creates undesirably large files compared to the original DNG’s filesize.
I would like to eventually batch fix some DNGs with artifacts and errors, then manually edit the written DNGs in darktable, but must figure figure out how, or even if, I can even write a DNG, or other RAW file, from Natron in the first place.
Perhaps there is a step between the Read node and Write node that I am missing?
Or a very specific combination of settings, in the Read node, or the Write node, or both?
I am running Natron 2.3.14, on Linux Mint 17.2 “Rafaela” (Based on Ubuntu 14.04 “Trusty”) 64-Bit.
I am not fully versed in either compositing or RAW photography, so I apologise in advance if I do not fully understand questions about or solutions to my problem.