Re: EncoderTransformation ignored, no errors produced.



if (vflip) {
// question 2: why is this ignored?
transform = EncoderValueTransformFlipVertical;
encoderParameters->Parameter[2].Guid = EncoderTransformation;
encoderParameters->Parameter[2].Type =
EncoderParameterValueTypeLong;
encoderParameters->Parameter[2].NumberOfValues = 1;
encoderParameters->Parameter[2].Value = &transform;
}

It will fail if the image that you loaded was not a jpeg image.
See:
http://msdn2.microsoft.com/en-us/library/ms533845.aspx



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