Hi,

I'm trying to use the Canon EDSDK with QT. That works quite smooth for all issues regarding the Camera Remote functions.
But when it comes to Raw development, I can't get rid of a crash EXC_BREAKPOINT (SIGTRAP) in CFRelease + 25.
The Canon SDK for Mac OS X seems to be written in Objective C.

The same code I'm using in QT 4.8.0 / x86 is working fine when compiling as 32bit in XCode 4, adapted to Objective C.

I tried creating a Cocoa Autoreleasepool manually, tried a lot of more things to track down the problem - without any success.
As soon as it reaches "EdsSaveImage" it crashes.
It gets a s far as printing out the width and height. Error codes are always 0 = EDS_ERR_OK

Any experience with Canon EDSDK or similar issues?

Qt Code: 
  1. EdsError err=EDS_ERR_OK;
  2.     EdsImageRef mimageRef;
  3.  
  4.     // Create FileStream
  5.     EdsStreamRef inStream = 0;
  6.     err = EdsCreateFileStream(
  7.               path.toAscii(),
  8.                 kEdsFileCreateDisposition_OpenExisting,
  9.                 kEdsAccess_ReadWrite,
  10.                 &inStream
  11.                 );
  12.     // Create ImageRef
  13.     if(!err){
  14.         err = EdsCreateImageRef( inStream, &mimageRef );
  15.     }
  16.     qDebug("LOAD %d",err);
  17.  
  18.     EdsUInt32 jpegQuality = 9;
  19.     EdsTargetImageType imageType = kEdsTargetImageType_Jpeg;
  20.  
  21.     err = EDS_ERR_OK;
  22.  
  23.     // Create Target Stream
  24.     EdsStreamRef targetStream;
  25.     QString sPath = "testttr.jpg";
  26.     err = EdsCreateFileStream((const char*) sPath.toAscii(), kEdsFileCreateDisposition_CreateAlways, kEdsAccess_ReadWrite, &targetStream);
  27.     qDebug("CREATE %d",err);
  28.  
  29.     // Set SaveImageSetting
  30.     EdsSaveImageSetting saveImageSetting = {0};
  31.     saveImageSetting.JPEGQuality = jpegQuality;
  32.  
  33.     err = EdsGetImageInfo(mimageRef, m_imageSource, &imageInfo );
  34.     qDebug("HEIGHT %d",imageInfo.height);
  35.     qDebug("WIDTH %d",imageInfo.width);
  36.  
  37.     // Save Image
  38.     if(!err) err = EdsSaveImage( mimageRef, imageType, saveImageSetting, targetStream);
  39.     // Release
  40.     if(targetStream) EdsRelease(targetStream);
  41.  
  42.     return err;
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