Author Topic: What can I do with the .XMP file?  (Read 464 times)

Offline vsvensso

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What can I do with the .XMP file?
« on: June 29, 2022, 04:43:14 PM »
I'm confused about the way photos are saved onto my computer after being ingested by photomechanic. I see that after ingesting, the photos are saved as .NEF file (the raw photo like on the SD card) with a supporting .XMP file. I'm assuming the reason photomechanic ingests so quickly is because of the creation of this supporting file. I wanted to upload the photos I ingested and culled with photomechanic into an online client gallery but it didn't support the file type that it was saved as (neither .NEF or the .NEF plus the .XMP). So I feel like I don't really have my raw photos on my computer because the only thing I can do with them is import them into lightroom and no where else. My workaround was exporting those same photos from lightroom as JPEGs. Now I have duplicates as JPEGs. Those are the ones I was able to upload into the client gallery.

My questions are: what is the .XMP file? What can I do with my raw photos saved in this format? Can I back them up in this format and still be able to use it however later?

All I want to do now is backup the raw photos (the .NEF, not the JPEGs) I ingested and culled using photomechanic onto my external hard drive so that I can delete them from my SD card and clear up some space. I just worry that if I back them up as the .NEF/.XMP that I won't be able to use them later. You might wonder why I don't just move the photos straight from the SD card onto my external hard drive. I can't really do that because it has ALL the photos from the day and I only want to back up the ones I culled. I renamed the photos on ingest and I deleted the ones I didn't want using photomechanic, so it would be nearly impossible for me to figure out which files on the SD card are the ones I kept during the culling process.

I hope my ramblings make sense! Obviously not very technical over here.

Offline Kirk Baker

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Re: What can I do with the .XMP file?
« Reply #1 on: June 29, 2022, 04:53:25 PM »
I'm confused about the way photos are saved onto my computer after being ingested by Photo Mechanic. I see that after ingesting, the photos are saved as .NEF file (the raw photo like on the SD card) with a supporting .XMP file. I'm assuming the reason Photo Mechanic ingests so quickly is because of the creation of this supporting file. I wanted to upload the photos I ingested and culled with Photo Mechanic into an online client gallery but it didn't support the file type that it was saved as (neither .NEF or the .NEF plus the .XMP). So I feel like I don't really have my raw photos on my computer because the only thing I can do with them is import them into Lightroom and no where else. My workaround was exporting those same photos from Lightroom as JPEGs. Now I have duplicates as JPEGs. Those are the ones I was able to upload into the client gallery.

My questions are: what is the .XMP file? What can I do with my raw photos saved in this format? Can I back them up in this format and still be able to use it however later?

The file ending in .XMP that matches the base filename of your .NEF file is a text file in XML format that stores the metadata for your NEF file.  It is a standard type created by Adobe and adopted by a great number of other applications like Photo Mechanic.

Yes, you can back them up, both the NEF and the XMP file.

Since you mentioned performance: XMP sidecar files don't make the ingest process appreciably faster or slower.

All I want to do now is backup the raw photos (the .NEF, not the JPEGs) I ingested and culled using Photo Mechanic onto my external hard drive so that I can delete them from my SD card and clear up some space. I just worry that if I back them up as the .NEF/.XMP that I won't be able to use them later.

Rest assured that you'll be able to use them later in a number of applications used for digital photography.

You might wonder why I don't just move the photos straight from the SD card onto my external hard drive. I can't really do that because it has ALL the photos from the day and I only want to back up the ones I culled. I renamed the photos on ingest and I deleted the ones I didn't want using Photo Mechanic, so it would be nearly impossible for me to figure out which files on the SD card are the ones I kept during the culling process.

No problem with that workflow.

If the service you upload to for your client gallery is supported by one of the Upload templates in Photo Mechanic, then you can upload as JPEG directly to your service from the NEF without having to make separate JPEG files.  The preview contained within the NEF file will be used to create a temporary JPEG which will be uploaded to your service and when it completes, the temporary file will be deleted.

HTH,

-Kirk

Offline ODThomas

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Re: What can I do with the .XMP file?
« Reply #2 on: June 30, 2022, 05:00:30 AM »
FYI. The .nef file is your camera’s raw file format, as you know. The .xmp file is a text file that contains metadata and any edits made to the raw file, exposure,  crops,  copyright info, tags etc. This is data that shouldn’t be written to your raw file, there is only one raw format I know of that can be written to, that’s .dng files.

These two files together (.nef and .xmp) are the ingredients and recipe, so to speak, that are used to create the jpegs, or any other non raw file format used for export to client libraries etc.

If you back up your raw file and it has edits, you need to back up the corresponding .xmp file too, otherwise you will lose your edits.

A useful video: https://youtu.be/oMRXAbxtanw