Thanks to berak's answer I've been able to get something going with OpenCV that uses much less code than the FFmpeg equivalent.
My new problem is that the resultant YUV image doesn't look correct. Following tutorials for saving/showing the image, it looks like the Y and/or U component are missing.
cv::Mat rgb=imread("lena.jpg");
cv::Mat yuv;
cv::cvtColor(rgb,yuv,CV_RGB2YUV);
This does the trick. Would you happen to know why the resultant yuv mat looks like the Y' and maybe the U components are missing?
What kind of YUV do you want? There is cvtColor function in OpenCV. It converts images from one color space to another. You need to use one of CV_BGR2YUVxxx constant.
YUV420 would be the desired constant, i think.
Do you know where this is documented? The cvtColor documentation doesn't have any of the YUV options listed.
Asked: 2013-04-26 09:01:56 -0600
Seen: 3,000 times
Last updated: Apr 26 '13
cv::Mat input_image = cv::imread("CustomInput.jpg"); cv::Mat output_image; cv::cvtColor(input_image, output_image, CV_BGR2YUV); cv::imwrite("/home/nmenne/hri/trunk/dsat/dsat_lsa/CustomOutput.jpg", output_image);