I'm porting an OpenCV 2.2 app from Unix (that works) onto Windows 7 64-bit and I receive the following exception when cv::imwrite is called
"OpenCV Error: Unspecified error (could not find a writer for the specified extension) in unknown function, file highgui\src\loadsave.cpp"
The original unix app works fine on my Mac and Linux boxes.
Does anyone know what library or compiler config I could be missing that makes this work on Windows?
I did the following things to get OpenCV running:
- Downloaded the binaries for v2.2 from the OpenCV site for windows. I'm using 2.2 because the original app uses it and I don't want to complicate my build at this stage.
- I am trying to imwrite to a .png file. I looked at the OpenCV code and noticed the necessity for external libs for Encoders such as Pngs or jpegs, so I tried writing to .ppm, .bmp which seems not to require deps, but I get the identical error.
- An example of my usage is cv::imwrite("out.png", cv_scaled); where cv_scaled is of type cv::Mat with format CV_32FC1
- Please remember the identical code works fine in unix
The fact .bmp or .ppm doesn't work this raises more questions:
- Why don't these very simple formats work?
- Is there a way to see a list of installed Encoders programmatically?
Thanks again for your kind assistance in helping me debug this problem.