How to write XMP tags to JPEGs

Fri, 03 Jul 2009 18:58:45 Z

Having retrieved a mutable BitmapMetadata object from an image I was able to read and write different scheme tags (e.g. exif).
Also XMP tags worked fine. At least those at the root level.

Trying to write xmp alt/seq/bag tags to the file failed with the following System.NotSupportedException (working with Vista):

"No imaging component suitable to complete this operation was found." with an inner exception of "HRESULT: 0x88982F50".

The following code caused the error:

// this all happens in a using directive, wrapping the FileStream of the image

BitmapMetadata meta = null;
JPEGEncoder encoder = new JPEGEncoder();
// ... using (FileStream imgStream = ... ) 

meta = decoder.Frames[0]... ;

// ensuring there is enough space for an insert
meta.SetQuery("/xmp/PaddingSchema:Padding", SomeUIntValue);
// setting an xmp "node" for "complex" tags
meta.SetQuery("/ifd/xmp", new BitmapMetadata("xmp"));
// setting an xmp "container" for entries 
meta.SetQuery("/ifd/xmp/dc:title", new BitmapMetadata("xmpalt" );
// writing the tag
meta.SetQuery("/ifd/xmp/dc:title/x-default", "New Title"); 
// adding metadata to encoder for writing
encoder.Frames.Add(..., meta, ...)

// ... closing using directive and disposing the resources of the stream


// Writing the updated Metadata by using another Filestream of the image
// ... using (Filestream imgStream = ...) 

// EXCEPTION when attempting to write metadata to file
try 
{
encoder.Save(imgStream);
} 
catch (Exception ex) 
{
// NotSupportedException
}

// ... closing using directive and disposing the resources of the stream

Any suggestions greatly appreciated.

How to write XMP tags to JPEGs

Mon, 27 Jul 2009 15:31:09 Z

Hi,

Did you solve this? I'm having the same problem.

Gilad.