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Whats the function of the *.cr2.cop files?

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15 comments

  • Coach
    The .cop files are the generated previews used by Capture One. They can be safely deleted once you are finished processing. If you need them again, just access the folder containing your raws and the program will re-create them again. I always delete them to save storage space, but I also always keep my .cos files which hold the adjustment settings.
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  • Dave241
    The thing is that CO does not clean up all of it's files when you are finished processing and have permanently deleted the no longer required RAW files, there are always some .cop files left over and you have to delete them manually.

    Dave...
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  • Drew Altdo
    .cop = Capture One Proxy

    When you see "Proxy" think "Preview". These are the files we generate from the RAW so that you can quickly view an image, as appose to waiting for the entire RAW to be read. They're very similar to JPEG files that we generate from the RAW as again, viewing a JPEG that is 7% of the RAW file is much faster than 100% of the RAW.
    As Capture One is designed with our Digital Backs in mind, we MUST use these proxies for an 80mp RAW file. It may be seem irrelevant when using a RAW file <10MB, or even another JPEG, but we cannot change the overall design of the software just to accommodate these smaller files.

    [quote="Dave241" wrote:
    The thing is that CO does not clean up all of it's files...


    OF course not, and to an extent I hope we never do. Too often software's will remove files without your knowledge and once we make a decision to "automatically remove" files that we've created it's a slippery slope to deleting something you've been working on without intention.
    If you access a folder of files that Capture One can read, in order to read them we'll create a subfolder with COP, COS and COF files. You can delete these as you see fit.
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  • Coach
    Say what? I didn't realize the OP was deleting his raw files as part of his cleanup. If he's doing it outside of C1 then I understand them needing to be removed manually. However, it has always been C1's behavior to also remove the proxies and settings when deleting a file within the program throughout the years. I definitely see it as a bug for the program to sometimes remove them and sometimes not. I have this problem with the .cos files at times, maybe with the proxies too, but since I'm not concerned with keeping them, I'm not sure if they are always removed or not. Again, if the program is inconsistent in it's behavior, I would "OF course" hope that it gets fixed.
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  • Glenn101
    Thanks for the replies. I've been using Capture One since Capture Lite first came out and thought I cleanup the old processing files. These .cop and .cos files popped up and I wasn't sure of their function. I wasn't deleting RAW files just surplus caches, etc. as I don't always delete image files within the program, maybe I should but I like to use Bridge for general file management as I like it's graphic Directory Tree display.
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  • BastianL
    Also I have found that if I want C1 to reload the exif data of my raw files (which I sometimes alter outside c1 adding analog equipment, film-id, image-id, etc to scans from negatives) it will only do so If I manually delete the .cop files.
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  • Glenn101
    I’m beginning to get the opinion that Phase One had to create an overly complicated system in order to allow Digital Backs to use the same software in a “one size fits all†approach and they threw in Sessions, Albums, Projects and Catalogs to add even more complications to the mix.

    The new processing engine is a great improvement over previous processors but the lack of detailed information about the new file systems is very disappointing and has left unanswered questions. In my opinion videos don't take the place of comprehensive text.
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  • Paul Steunebrink
    [quote="BastianL" wrote:
    Also I have found that if I want C1 to reload the exif data of my raw files (which I sometimes alter outside c1 adding analog equipment, film-id, image-id, etc to scans from negatives) it will only do so If I manually delete the .cop files.

    There is a metadata reload command in CO7, one from the Metadata tool tab, one from the File menu.
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  • Paul Steunebrink
    [quote="Glenn101" wrote:
    I’m beginning to get the opinion that Phase One had to create an overly complicated system in order to allow Digital Backs to use the same software in a “one size fits all†approach and they threw in Sessions, Albums, Projects and Catalogs to add even more complications to the mix.

    The new processing engine is a great improvement over previous processors but the lack of detailed information about the new file systems is very disappointing and has left unanswered questions. In my opinion videos don't take the place of comprehensive text.

    The file systems - when using sessions - is unchanged from previous versions, which is also true for the sessions.

    What is in particular new in CO7 is that many users never were aware of the session concept but are now confronted with a session-or-catalog question on first opening CO7, and start thinking...

    A lack of documentation regarding concepts (suggested title: "Capture One: how it works") is a topic I fully agree with.
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  • Glenn101
    I've gone back a few years and saw that Capture One used .cop and .cos files but I did not see any .cof files that used in the Pro 7 version. Could you tell me what their function is?
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  • Paul Steunebrink
    [quote="Glenn101" wrote:
    I've gone back a few years and saw that Capture One used .cop and .cos files but I did not see any .cof files that used in the Pro 7 version. Could you tell me what their function is?

    The .cof files are focus mask files, for the focus make feature. This was introduced in CO 5.
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  • BastianL
    [quote="Paul_Steunebrink" wrote:
    [quote="BastianL" wrote:
    Also I have found that if I want C1 to reload the exif data of my raw files (which I sometimes alter outside c1 adding analog equipment, film-id, image-id, etc to scans from negatives) it will only do so If I manually delete the .cop files.

    There is a metadata reload command in CO7, one from the Metadata tool tab, one from the File menu.


    The one in the file menu I cannot find, the reload command in the metadata tool tab I had tried a dozen times but it doesn't seem to do anything. Only as I delete the .cop file C1 shows the current metadata.
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  • Paul Steunebrink
    [quote="BastianL" wrote:
    [quote="Paul_Steunebrink" wrote:
    [quote="BastianL" wrote:
    Also I have found that if I want C1 to reload the exif data of my raw files (which I sometimes alter outside c1 adding analog equipment, film-id, image-id, etc to scans from negatives) it will only do so If I manually delete the .cop files.

    There is a metadata reload command in CO7, one from the Metadata tool tab, one from the File menu.


    The one in the file menu I cannot find, the reload command in the metadata tool tab I had tried a dozen times but it doesn't seem to do anything. Only as I delete the .cop file C1 shows the current metadata.

    You are correct; the Windows version does not have the Load Metadata command in the File menu (Mac does). But the command from the Metadata tool is identical.
    I have done some test on reloading metadata after I added, changed and deleted some metadata in a raw file from another program (Photo Mechanic) while the file is opened before in Capture One. With CO 7.0.2 all reloading was successful, all changes were loaded. Are you on 7.0.2?
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  • Glenn101
    [quote="Paul_Steunebrink" wrote:
    [quote="Glenn101" wrote:
    I've gone back a few years and saw that Capture One used .cop and .cos files but I did not see any .cof files that used in the Pro 7 version. Could you tell me what their function is?

    The .cof files are focus mask files, for the focus make feature. This was introduced in CO 5.


    Thanks for the reply. I haven't used sharpen mask with ver. 7.02 but I do prefer to use "Version 3.7 Sharpening" so I assume that created the .cof files.
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  • Paul Steunebrink
    The .cof files for Focus Mask have no relation to sharpening and are always generated along with the .cop preview files. The focus mask shows you the in-focus area in the image. You can set the threshold in the Preferences.
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