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Get metadata using extendscript from raw file(.cr2,.cr3 etc) without opening the raw file

Forum|Forum|1 year ago
July 30, 2024
5 replies
1236 views

This works no problem with a jpeg however the same method doesn't work with a camera raw file.

https://community.adobe.com/t5/photoshop-ecosystem-discussions/get-print-dpi-resolution/m-p/10502704#M250043

I have also tried this but it only shows the first part of the metadata. I really don't know what to do. Essentially I just want to check if there is a rating greater than 0 in the metatdata of files in a folder without opening/closing each RAW file individually as it takes a lot of time. Any help would be much appreciated.

if (ExternalObject.AdobeXMPScript === undefined) {
    ExternalObject.AdobeXMPScript = new ExternalObject('lib:AdobeXMPScript');
}

// Function to load XMP metadata from raw file
function loadXMPMetadata(rawFilePath) {
    var xmpFile = new File(rawFilePath);
    if (!xmpFile.exists) {
        alert("Raw file does not exist: " + rawFilePath);
        return;
    }

    // Read the XMP data from the file
    xmpFile.open('r');
    var xmpData = xmpFile.read();
    xmpFile.close();
    alert(xmpData)
    // Create an XMPMeta object from the data
    var xmp = new XMPMeta(xmpData);
    var serializedXMP = xmp.serialize()
    alert(serializedXMP)
}

Actions and scripting

This topic has been closed for replies.

Correct answer Stephen Marsh

This does it for a folder of CR3 images:

/*
Get XMP Rating Metadata for CR3 Files in Folder.jsx
v1.0 - 31st July 2024, Stephen Marsh
https://community.adobe.com/t5/photoshop-ecosystem-discussions/get-metadata-using-extendscript-from-raw-file-cr2-cr3-etc-without-opening-the-raw-file/td-p/14770220
*/

#target photoshop

if (ExternalObject.AdobeXMPScript === undefined) {
    ExternalObject.AdobeXMPScript = new ExternalObject("lib:AdobeXMPScript");
}

try {
    var theFolder = Folder.selectDialog("Select a folder...");
    if (theFolder) {
        var files = theFolder.getFiles(function (file) {
            return file instanceof File && /\.cr3$/i.test(file.name);
        });

        if (files && files.length > 0) {
            var theFiles = [];
            for (var i = 0; i < files.length; i++) {
                var theRating = getXMPRating(files[i]);
                theFiles.push(files[i].name + " - Rating: " + theRating);
            }
            alert("Files containing rating metadata:\n" + theFiles.join("\n"));
        } else {
            alert("No supported files found in the selected folder!");
        }
    } else {
        alert("No folder selected!");
    }
} catch (e) {
    alert("An error occurred: " + e.message);
}


function getXMPRating(file) {
    try {
        var xmpFile = new XMPFile(file.fsName, XMPConst.UNKNOWN, XMPConst.OPEN_FOR_READ);
        var xmp = xmpFile.getXMP();
        if (xmp.doesPropertyExist(XMPConst.NS_XMP, "Rating")) {
            return xmp.getProperty(XMPConst.NS_XMP, "Rating");
        }
    } catch (e) {
        // If there's an error, return 0 (unrated)
        return 0;
    }
    // Default to 0 if no rating found
    return 0;
}

L

Lumigraphics

Legend

Why not use Bridge for this? That way you can read both the RAW file and the XMP sidecar together.

J

JibbletonAuthor

Participating Frequently

Building a specific script that runs only in photoshop. I haven't used bridge in years to be honest. Maybe I could have done something with it but it's done now.

Stephen Marsh

Correct answer

Community Expert

This does it for a folder of CR3 images:

/*
Get XMP Rating Metadata for CR3 Files in Folder.jsx
v1.0 - 31st July 2024, Stephen Marsh
https://community.adobe.com/t5/photoshop-ecosystem-discussions/get-metadata-using-extendscript-from-raw-file-cr2-cr3-etc-without-opening-the-raw-file/td-p/14770220
*/

#target photoshop

if (ExternalObject.AdobeXMPScript === undefined) {
    ExternalObject.AdobeXMPScript = new ExternalObject("lib:AdobeXMPScript");
}

try {
    var theFolder = Folder.selectDialog("Select a folder...");
    if (theFolder) {
        var files = theFolder.getFiles(function (file) {
            return file instanceof File && /\.cr3$/i.test(file.name);
        });

        if (files && files.length > 0) {
            var theFiles = [];
            for (var i = 0; i < files.length; i++) {
                var theRating = getXMPRating(files[i]);
                theFiles.push(files[i].name + " - Rating: " + theRating);
            }
            alert("Files containing rating metadata:\n" + theFiles.join("\n"));
        } else {
            alert("No supported files found in the selected folder!");
        }
    } else {
        alert("No folder selected!");
    }
} catch (e) {
    alert("An error occurred: " + e.message);
}


function getXMPRating(file) {
    try {
        var xmpFile = new XMPFile(file.fsName, XMPConst.UNKNOWN, XMPConst.OPEN_FOR_READ);
        var xmp = xmpFile.getXMP();
        if (xmp.doesPropertyExist(XMPConst.NS_XMP, "Rating")) {
            return xmp.getProperty(XMPConst.NS_XMP, "Rating");
        }
    } catch (e) {
        // If there's an error, return 0 (unrated)
        return 0;
    }
    // Default to 0 if no rating found
    return 0;
}

J

JibbletonAuthor

Participating Frequently

Awesome. You absolute legend. Thank you so much.

Stephen Marsh

Community Expert

You're welcome!

Stephen Marsh

Community Expert

@Jibbleton

This code does it for a single image, without opening the image:

/*
Based on:
https://community.adobe.com/t5/photoshop-ecosystem-discussions/how-to-read-xmp-metadata-in-ps-using-javascript/m-p/12966451
*/

#target photoshop

var theFile = File.openDialog();
var ns = "http://ns.adobe.com/xap/1.0/";
ExternalObject.AdobeXMPScript = new ExternalObject('lib:AdobeXMPScript');
xmpMeta = new XMPFile(theFile.fsName, XMPConst.FILE_XMP, XMPConst.OPEN_FOR_READ).getXMP();
var theValue = Math.abs(xmpMeta.getProperty(ns, "Rating"));
alert("Rating: " + theValue + " stars");

You would just need to adapt this to loop over the files in the folder, rather than selecting a single image.

Stephen Marsh

Community Expert

For a CR2 file with no sidecar, Exiftool reports the following:

[IFD0]          XResolution                     : 72
[IFD0]          YResolution                     : 72
[IFD0]          ResolutionUnit                  : inches

For an ORF file, there is main image info (IFD0) and thumbnail info (IFD1):

[IFD0]          XResolution                     : 314
[IFD0]          YResolution                     : 314
[IFD0]          ResolutionUnit                  : inches

[IFD1]          XResolution                     : 72
[IFD1]          YResolution                     : 72
[IFD1]          ResolutionUnit                  : inches

For an ARW file, again, there is main image info (IFD0) and thumbnail info (IFD1):

[IFD0]          XResolution                     : 350
[IFD0]          YResolution                     : 350
[IFD0]          ResolutionUnit                  : inches

[SubIFD]        XResolution                     : 350
[SubIFD]        YResolution                     : 350
[SubIFD]        ResolutionUnit                  : inches

[IFD1]          XResolution                     : 72
[IFD1]          YResolution                     : 72
[IFD1]          ResolutionUnit                  : inches

More here:

https://exiftool.org/#groups

https://exiftool.org/#tagnames

https://exiftool.org/TagNames/

https://exiftool.org/TagNames/EXIF.html

Stephen Marsh

Community Expert

What do you see in File > File Info > Raw Data?

Something like this?

<tiff:XResolution>300/1</tiff:XResolution>
<tiff:YResolution>300/1</tiff:YResolution>
<tiff:ResolutionUnit>2</tiff:ResolutionUnit>

Keep in mind that this isn't coming from the raw file, it is coming from the ACR workflow options.

~~Are there XMP sidecar files for the raw files? These would be faster to process.~~ Edit: It looks like there isn't any useful info in the XMP sidecar file.

One could argue that for a raw file, this is meaningless. It may be at a default value such as 72 ppi, or some other value set by the camera or hard-coded by the manufacturer. Different raw file formats may or may not contain this metadata or may contain conflicting metadata.

I would probably use ExifTool for this task.

J

JibbletonAuthor

Participating Frequently

Thank you so much for responding. I ended up falling asleep here in the EU. I don't think I was clear in my question and I apologise. I wanted to get the metadata of raw file so that I can get the star rating. The side car files only appear after I open the file and do something with it manually. I really need to use photoshop as this code I'm trying to make is part of a larger script with photoshop. It's the only part I haven't got working.

Stephen Marsh

Community Expert

Ah, the link that you posted was about resolution, I wasn't sure why you used the term "a rating greater than zero".

This wouldn't exist in the raw file as Adobe treat that as read-only, it would be in the XMP sidecar file.

Are you saying that your camera or some other software that you use upstream has a rating feature that directly rates a raw image outside of Photoshop, Bridge etc – without using a sidecar? If so, can you provide a sample of such as raw file?

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