Max No of RAW files processed at one time?
Hi,
I have a large number of RAW files (several thousand) from an archive that I would like to process into DNG files all at once. Is there any limit to the number of files that can be processed at one time, and does this depend on the specifications of the PC?
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I think that it probably does depend on the specifications of the PC. I think that you may find that if you try to process a very large number at once, it gets slower and slower. I'd suggest a more modest number first - so for example if 50 process at an acceptable speed, you could try 100 or 200 next.
May I ask why you want to process them to DNG?
Ian
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As DNG is a published file format, this is preferred by archives rather than the proprietary RAW format. Unfortunately DNG is generally a larger file size than the native RAW. I said several thousand as an opener, we actually have over 100,000 that will need to be converted.
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> Derek Smart: DNG is a published file format, this is preferred by archives rather than the proprietary RAW format
Tiff may be an alternative.
Quite a few users have been caught by surprise when they learn that C1 does not handle DNG the way they expected. https://support.captureone.com/hc/en-us/articles/360003336397-Improved-DNG-support
You may want to embed the original raw file in each DNG and verify that your chosen archives will be happy.
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> Derek Smart: ...large number of RAW files (several thousand) from an archive that I would like to process into DNG files all at once
Tall order indeed. Or does "at once" mean selecting 100000+ images, start processing with "one click" and then wait until the last DNG emerges from the processing pipeline?
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I've output 3000+ files numerous times from raw to jpg on a weak 2 core macbook pro with integrated gpu, it would take 8-10 hours. I let it run over night and it has done just fine other than the time it takes. I've also done the same process on mid level iMacs and it would only take 2-3 hours.
I'd suggest to start with a small batch just to make sure everything in the conversion goes according to plan, then try 1k, then try 3k then try 5k, etc.
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DNG is not the most preferred format for archiving, at least not by everyone.
As an example, see here
https://www.loc.gov/preservation/resources/rfs/stillimg.html
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Yes OddS.,
Unlayered uncompressed TIFF seems to be considered a high-quality widely accepted low-risk longterm archive format. But maybe it is not Derek's decicion and he must deliver what's requested.
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>OddS https://support.captureone.com/hc/en-us/articles/360003336397-Improved-DNG-support
Not sure I fully understand what Capture One are saying here? Most of the files are seen by Capture One and will be converted there. All the conversions I have done so far C1 will see the DNG and process it as normal. As far as I can see the DNG does not have a colour profile attached, but I think we are accepting this.
>BeO Interesting that LOC prefer Tiff but will accept DNG. We at present archive the native RAW files with a migrated Tiff. Our archive dep. have decided on DNG from looking at LOC standards.
Lastly you are correct it is not my decision.
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Yeah, I don't know. How can one assume that a format which has compatibitly issues with some software (or vice versa) even today would be a good format for loooooooong-term archiving :-)
Though from 2015, still interesting read:
https://photographylife.com/why-i-no-longer-convert-raw-files-to-dng
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> DSAD: Most of the files are seen by Capture One and will be converted there.
As in "Most raw files are seen by Capture One and converted to DNG by Capture One"? The DNG is created by Capture One and will be used by Capture One at the archive end of the workflow, or what?
The article I linked to is about the fact that Capture One does not handle all kinds of DNG. The limitations are stated in the article.
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