How to read XMP metadata from a Jpeg

This seems like it should be a no-brainer, but I can't find any classes to do this ?? I can find classes to read song titles from MP3 files, I want to do similar with jpeg image files.
In photoshop and lightroom you can set up titles and captions (and copyright info) in the metadata. When you save a jpeg this gets embedded in the file.
How to read this info and parse it and use it once you have loaded it into a BitMapData???
I am Flash/AS3.0 code only no IDE - please no flex/AIR examples!
Thanks!

http://www.adobe.com/devnet/xmp/

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I am trying to read XMP metadata of an indd file using CS Extension Builder in Flash Builder 4.5.
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I have got the currently opened document in InDesign as follows:
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var myXMP:XMPMeta = new XMPMeta();
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I have found that the XMP data of an InDesign document can be retrieved in actionscript as follows:
InDesign.app.activeDocument.metadataPreferences
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But I am not able to iterate each namespace in the xmp. There isn't any XMPFile class which allows me to serialize the object to xml file so that I can iterate all elements in the XMP.
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Can anyone shed light on this?

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I'm having some troubles to understand how to add and read XMP metadata on a psd file. I followed the Panel developer guide tutorial, and try to look on the internet for some answers, but I'm still stuck ...
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     The function loads the XMP Script Library.
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Rather mess with EXIF and Dublin Core namespaces, wouldn't it be better to create your own?
IE:
#target photoshop
addtoMeta();
function addtoMeta(){
if(!documents.length) return;
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Hi,
I am new to this field and now I have to write a C++ code which will read the XMP metadata from any pdf files. Could anyone please tell me how to do that or where to start? Is there any sample code available for that?
I am reading the Programmer's guide and XMP specification to have the whole idea.
I really appriciate your help. Thanks in advance.
Regards,
Suranjit Paul

Hi,
The same code for reading other formats will go for Pdf too.
Only difference is while reading PDF it is not calling any smart filters.

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How do it extract XMP metadata from specific Photoshop Layer in After Effects?
I am just getting my hands dirty with metadata.
I know it is possible to attack metadata to a layer/layerset in Photoshop, but how to I get it out in After Effects.
Here is the process.
I create BunchaLayers.psd.
Using the PerLayerMetaData.jsx file attached.
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John Nack on Adobe : Per-layer metadata comes to Photoshop
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["Metadata"]
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Hello,
I am currently having troubles reading custom metadata from a file.
I wrote a really simple test case to show you that, maybe I'm doing something wrong...
Writing a simple property :
static const char * kNS1 = "ns:test1/";
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 LOGIT( LOG_ERROR, "Could not initialize XMP toolkit!" );
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 if ( !SXMPFiles::Initialize( options ) )
 LOGIT( LOG_ERROR, "Could not initialize SXMPFiles!");
 return;
 try
 SXMPMeta meta;
 std::string value;
 meta.SetProperty( kNS1, "name", "value" );
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 bool exists = meta.GetProperty( kNS1, "name", &value, 0 );
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 p_private->m_file.PutXMP( meta );
 else
 LOGIT( LOG_ERROR, "PutXMP: cannot put XMP" );
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 SXMPFiles::Terminate();
 SXMPMeta::Terminate();
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 LOGIT( LOG_ERROR, "Could not initialize XMP toolkit!" );
 return;
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 std::string actualPrefix;
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 if ( !SXMPFiles::Initialize( options ) )
 LOGIT( LOG_ERROR, "Could not initialize SXMPFiles!");
 return;
 try
 // Options to open the file with - open for editing and use a smart handler
 XMP_OptionBits opts = kXMPFiles_OpenForUpdate | kXMPFiles_OpenUseSmartHandler;
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 bool ok = p_private->m_file.OpenFile( "Collines.jpg", kXMP_UnknownFile, opts );
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 SXMPMeta meta;
 std::string xmpPacket;
 XMP_PacketInfo packetInfo;
 ok = p_private->m_file.GetXMP( &meta, &xmpPacket, &packetInfo );
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 std::string value;
 bool exists = meta.GetProperty( kNS1, "name", &value, 0 ); // returns false...
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 p_private->m_file.CloseFile();
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 SXMPMeta::Terminate();
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Do you have any idea?
Thanks in adavance!
Chris.

Hello? No one has any idea?

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> Please give any samples.
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