AVI Writer OpenCV access violation

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C++

CvVideoWriter *writeravi = cvCreateVideoWriter("C:\\outavi.avi",CV_FOURCC('D','I','V','X'),fps,cvSize(frameW,frameH),isColor);

for(int stepframe=0;stepframe<numFrames;stepframe++)
{
	cvGrabFrame(captureavi);          
	imgavi=cvRetrieveFrame(captureavi);
	int t= cvWriteFrame(writeravi,imgavi);  
	cvShowImage("image",imgavi);
	cvWaitKey(20);
}

It gives me aceess violation,(even writeravi=0x003ecd18 )

if i put "0" or "-1" instead of CV_FOURCC('D','I','V','X') it works but ) stands for uncompress output & -1 gives dialg box to select compression type , from which Intel indeo video 4.5 works for me.


But in my applicationh i cant use ) or -1 7 i want compresss output.

[edit]SHOUTING removed, Code block added, "Treat my content as plain text..." option disabled - OriginalGriff[/edit]