Author Topic: Adobe Camera Raw  (Read 13816 times)

Offline dogear

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Re: Adobe Camera Raw
« Reply #15 on: October 23, 2006, 04:15:04 pm »
Would those changes to the preference settings be recommended for users of Bibble Pro, which also utilizes sidecar (.bib) files? Actually, I use both BP and ACR. Thanks.

Offline Kirk Baker

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Re: Adobe Camera Raw
« Reply #16 on: October 23, 2006, 04:41:02 pm »
Would those changes to the preference settings be recommended for users of Bibble Pro, which also utilizes sidecar (.bib) files? Actually, I use both BP and ACR. Thanks.

Not being a Bibble user, I can't say for sure.  Basically there are two sides to the RAW captioning issue: one says that captioning RAW files directly is perfectly fine and the other says that RAW files should never be modified.  We made our RAW captioning technology be completely undoable.  Thus you can try it out with your favorite applications and see if everything cooperates properly.  If they don't then you can undo the files with the "Revert TIFF-based RAW photos to original" tool to take them back to their pre-captioned state.

If Bibble picks up on the embedded IPTC/XMP data and has no issues rendering the RAW files, then I'd say embed away since it is more convenient not to have .XMP files as well as .bib files for each RAW file that you work on.

Otherwise, XMP is becoming more and more accepted among professional apps and writing sidecar files will keep your RAW files from being modified.

-Kirk

Offline dennis

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Re: Adobe Camera Raw
« Reply #17 on: October 26, 2006, 06:38:13 pm »
Karsten,

Wow - sounds like a lot of confusion here...

First of all, any image adjustment changes made in ACR that aren't actually written as a JPEG preview into your NEF files (can I say Hell Freezing Over?) aren't going to be shown in Photo Mechanic.  ACR writes "non-destructive" edits to NEF files into XMP sidecar files so that ACR (and probably ACR only) can "render" those changes.  Naturally Photoshop will show these changes as well (since they are Adobe proprietary changes to RAW files saved in XMP).

Now, regarding IPTC, this is a different story (and a big mess thanks to most other software besides Photoshop and Photo Mechanic).

However, if you choose to embed XMP into a (TIFF-based) RAW file, then you will likely experience problems with an Adobe workflow.  The reason (as we have mentioned before) is that Adobe READS from embedded XMP but only UPDATES the XMP sidecar file.  This means that if you make certain adjustments to a RAW file using ACR/Bridge, only the XMP sidecar file wil be updated, and therefore when you look at the same file later, it will still have the (stale) settings in the embedded XMP.  This could be considered a "bug" in ACR/Bridge: if it only writes/updates XMP sidecar files, then it should use those as the master.  So until Adobe fixes this problem, you should uncheck the option to embed XMP into RAW files.

Now regarding embedding IPTC in RAW files, Adobe's products don't have any problems with this (although this isn't the case with several other software programs or operating systems such as Apple's).  So if you are using an Adobe only workflow (i.e. no Aperture or C1 etc), my suggestion is to go ahead and embed IPTC (but not XMP) into RAW files so that Adobe can retain your captions (along with other software that can handle embedded IPTC info).  It is up to you to decide whether or not you should always create XMP sidecar files, etc, when updating RAW files (e.g. do you mind that an XMP sidecar file is always created with only IPTC info when you are already embedding IPTC, or do you only want to update an XMP sidecar file if it exists and already contains any IPTC-related data?).

One could write a book on this subject, but by the time it is published, other software may have been updated to catch up with the unfortunate reality of meta data and (those damned proprietary) RAW files.  The real unfortunate reality is that different programs have differing levels of support for IPTC/XMP, and that is precisely why we added all those (confusing?) options in Photo Mechanic in order to adjust for different workflows.  Just be aware that as you work with different programs, you may need to adjust Photo Mechanic's preferences to accomodate their incompatibilities.

--dennis

Offline Marty Ojaste

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Re: Adobe Camera Raw
« Reply #18 on: October 27, 2006, 06:12:14 am »
Dennis, thsi sounds like an opportunity for someone;

What would be very useful is a document with screen shots of that the setting for PM should be for interoperabilty using different workflows,

- starting with a Adobe only;
- then Apperature only,
- then Nikon Capture only;
- then the other 3rd party raw converters like RSE, Bibble.

Each should include iView MediaPro and/or Portfolio ties.

 
\Marty

Offline kwell

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Re: Adobe Camera Raw
« Reply #19 on: November 02, 2006, 05:24:12 am »
Two of the cited benefits of converting proprietary RAW files to Adobe's documented DNG raw format are that (1) the open documentation allows for writing XMP and IPTC data directly into the file, eliminating the need for sidecars; and (2) Photoshop (and eventually Lightroom, though not Elements) will update the embedded JPG preview file to reflect any changes you made in the ACR settings. This would make RAW files viewed in Photo Mechanic match the adjusted image rather than the original camera-embedded version.

There is a lively debate about the pros and cons of converting proprietary RAW files to DNG, and I'm not advocating one way or the other, but I did want to mention these two aspects which are relevant to this thread.

Incidentally Nikon's Capture NX will also update the embedded JPG preview in its NEF files if you go with that program for your raw conversions.

Kevin