rawtherapee.com

jdGlanville · Joined: 12 Jan 2010 Posts: 6

Hello all,

I've searched the forums and documentation for the answer to this question without success.

I have Canon RAW files (CRW) in which I have embedded some IPTC information. When I open that RAW file in RT, I can't see the IPTC information on the Metadata / IPTC tab. Also, when I save the image in TIFF or JPEG, the resulting file don't have the IPTC information from the RAW file.

Does RT read IPTC information from CRW files?

Thanks

procyon · Joined: 07 Jan 2010 Posts: 7

How did you embed the IPTC data ?
Most programs don't write the data actually to the RAW file but just create a sidecar file with the information.

DrSlony

digiKam can

keenonkites · Joined: 24 Aug 2007 Posts: 417 Location: Switzerland

there are a lot of tools that are able to embed either IPTC, XMP or other data directly in the original source raw files...
.... but to be honest, I would strongly recommend not to do so.... RAW files are per definition proprietary file formats (except a few exceptions) and as this formats are only reengineered but not really open, it's dangerous to add stuff there...

But this is my very personal opinion and is bit, only a bit off-topic
Wink

Patrik

jdGlanville · Joined: 12 Jan 2010 Posts: 6

jdGlanville · Joined: 12 Jan 2010 Posts: 6

OK, I don't think there's been an explicit answer to my question: does RT read the IPTC information embedded within Canon RAW files, and does it them write that IPTC information into the converted JPEG / TIFF files?

keenonkites · Joined: 24 Aug 2007 Posts: 417 Location: Switzerland

can you post an example image ?
best RAW and the converted one, so we can check about the tags ?

Patrik

jdGlanville · Joined: 12 Jan 2010 Posts: 6

Sorry for the delay. Sometimes life gets busy.

What is the best way of sharing RAW files? I thought what I'd do is post them on a photo website, like picasaweb or flickr, but neither of them allow uploading of CRW files. I even tried to get creative and renamed the CRW IMG-5911.CRW.JPG.

DrSlony

http://rawtherapee.com/forum/viewtopic.php?t=1588

jdGlanville · Joined: 12 Jan 2010 Posts: 6

Thanks DrSlony

OK, here's what I've got.

Note that the metadata is actually not in the CRW file but the THM file.[/url]

keenonkites · Joined: 24 Aug 2007 Posts: 417 Location: Switzerland

The THM file is what is 'causing' your troubles.... RawTherapee does only consider the RAW file itself....

but on the other hand: having the tags in the THM file is a 'good' solution, nothing to complain about... this way you leave the original RAW file untouched...

... But I'll check again a bit deeper lateron.
Regards
Patrik

keenonkites · Joined: 24 Aug 2007 Posts: 417 Location: Switzerland

I've checked again:

here the results of dumping all metainfo:

IMG_5911.crw

jdGlanville · Joined: 12 Jan 2010 Posts: 6

Thanks for the suggestion. I'm already using ExifToolGUi to copy IPTC data from the THM into the JPG. Unfortunately, that's a very manual and time consuming process. I'd love it if it was part of the RAW conversion process.

keenonkites · Joined: 24 Aug 2007 Posts: 417 Location: Switzerland

you could write a batchfile that copies automatically the IPTC Data from the THM file over to the JPG.... as long as they have the same name and are located in the same directory this should be possible with a quite easy script... if you put this scipt onto the desktop you should be able to drop the file (THM or JPG) onto that script... I'm not the windows script guru, sorry can't help you here....
Visual Basic could help too....
The process is still manual, but already much easier.

Patrik

DrSlony

The only 'correct' approach would be to make RT copy over all metadata... I suppose we have nothing against using exiftool or exiv2 in RT, do we?