Interpreting Video meta data from the Quicktime movie

Hi all,
I am trying to interpret the Video metadata such as 'pasp'(Pixel aspect ratio) and 'fiel' (field).
I tried the following ce, i am not getting any error code , but it doesn't give result also...
=============================================================================
=============================================================================
FSSpec sourceMovieFile;
short refnum = -1; //kInvalidFileRefNum;
err = FSMakeFSSpec(0, 0L, "myFilePath", &sourceMovieFile);
// Create a QT movie from it 
err = NewMovieFromFile(&_sourceMovie, refnum, nil, nil, newMovieActive, nil);
DataHandler _outDataHandler = 0L; 
Handle _outDataRef;
OSType _outDataRefType;
Component _dataHandlerComponent;
ICMCompressionSessionOptionsRef sessionOptions;
CFStringRef fileNameCFSTR = "MyFilePath";
err = QTNewDataReferenceFromFullPathCFString(fileNameCFSTR,kQTWindowsPathStyle,0,&_ou tDataRef, &_outDataRefType);
_dataHandlerComponent = GetDataHandler(_outDataRef, _outDataRefType, kDataHCanRead);
err = OpenAComponent(_dataHandlerComponent, &_outDataHandler);
result = ICMCompressionSessionOptionsCreate(0L, &sessionOptions);
result = SCCopyCompressionSessionOptions(_outDataHandler, &sessionOptions);
PixelAspectRatioImageDescriptionExtension pixelAspectRatio;
err = ICMCompressionSessionOptionsGetProperty ( 
sessionOptions ,
kQTPropertyClass_ICMCompressionSessionOptions, kICMCompressionSessionOptionsPropertyID_PixelAspectRatio, sizeof(pixelAspectRatio),
&pixelAspectRatio,0L);
//=============================================================================
err is always zero but ICMCompressionSessionOptionsGetProperty() gives pixelaspectratio hSpacing and vspacing comes as zero...
If there is any other simple way . please reply...
Thanks in advance,
Noorul

Thanks, forgot about that.
For what ever reason it started working correctly a couple of hours later, after I started an SD project. The video came out fine
I had been trying out a couple new applications, so maybe one was causing it. I will see if it happens in the future.
Jim

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