Question for the LR Experts

[NorthernFocus]

OK, I'm thoroughly confused. I have my LR catalogs set to write changes to XMP files. But I just noticed that when I edit a jpeg file in LR, it does not create an XMP file like it does for RAW. Nor does Windows indicate that the jpeg file has been modified. Anyone have any idea what's going on there?

[ST1]

Dan
Have a look at this video which explains what you are asking about, at least I hope it does?

It seems its all about proprietary file types e.g. JPG

http://blogs.adobe.com/jkost/tag/xmp-sidecar-files
.

[NorthernFocus]

Thanks for the replies, guys. Peter, this explained it perfectly.

Dan
Have a look at this video which explains what you are asking about, at least I hope it does?

It seems its all about proprietary file types e.g. JPG

http://blogs.adobe.com/jkost/tag/xmp-sidecar-files

[ST1]

Glad that Lady explained it for you Dan. Julieanne is the expert for me

[dje]

Dan I use ACR rather than LR too but I suspect the behaviour is the same when editing jpegs. The editing adjustments are saved in the XMP section of the EXIF info embedded in the jpeg file. Julieanne touches on it in the video but only very briefly. If you open up the jpeg in EXIF Tool (before and after editing in ACR), you can see that XMP info has been added to the "after" version. This is in a format that only Adobe editing software will recognise so the changes will only show up when you are viewing it in this software.

However if you re-save/export the file you've just edited in ACR/LR, the editing changes will be "burnt in" and will be visible in any viewing software.

Dave

[NorthernFocus]

Thanks for the additional info, Dave.

99 percent of my master files are RAW. I only create jpegs on final export after all editing is done. Consequently I don't worry about keeping jpegs because I can easily re-create them. But unfortunately, back in 2008 when we visited NZ I was shooting jpeg. So I have a whole set of jpegs that are master files. I think my resolution is going to be to generate a set of DNG masters. I already have them tagged as "read only" in windows but am mostly concerned that I mistakenly delete them some day. I don't typically use DNG format so they'll stand out as unique and I'm less likely to make a dumb mistake.

[DanK]

Thanks for the additional info, Dave.

99 percent of my master files are RAW. I only create jpegs on final export after all editing is done. Consequently I don't worry about keeping jpegs because I can easily re-create them. But unfortunately, back in 2008 when we visited NZ I was shooting jpeg. So I have a whole set of jpegs that are master files. I think my resolution is going to be to generate a set of DNG masters. I already have them tagged as "read only" in windows but am mostly concerned that I mistakenly delete them some day. I don't typically use DNG format so they'll stand out as unique and I'm less likely to make a dumb mistake.

Why not just create a duplicate directory with the originals? You can even place it where LR won't find it. Then you can always retrieve them if something goes wrong, or if you want to do a fresh edit.

When I started with digital and shot jpegs, I used an earlier version of Paint Shop Pro, and my vague recollection is that it had an option to automatically place originals from edited copies in separate folders. It created a subdirectory. I am not certain anymore which went where, but I think it placed the originals of edited photos into the subdirectory. I may have it reversed.

[NorthernFocus]

Why not just create a duplicate directory with the originals? You can even place it where LR won't find it. Then you can always retrieve them if something goes wrong, or if you want to do a fresh edit.

When I started with digital and shot jpegs, I used an earlier version of Paint Shop Pro, and my vague recollection is that it had an option to automatically place originals from edited copies in separate folders....

That's what I had done previously and will just go back to that as the simplest option. I was cleaning up/consolidating my filing system and using LR to do so when I ran across this issue. But I have more jpeg originals than I realized so will just keep my old system, i.e. a separate folder for jpeg originals.

Nikon software also automatically keeps original copies of jpegs when you make edits. Modifying them in LR isn't my issue. It's accidental deletions that I'm worried about. The old method worked and I'm used to it. And being jpegs an extra set doesn't use that much disk space either. No biggie...