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Below code is used to convert an OpenCV Mat image into SFML image. How to convert SFML image back to Mat image?

cv::Mat frameBGR, frameBGRA; sf::Image image;
cv::cvtColor(frameBGR,frameRGBA, cv::COLOR_BGR2RGBA);
image.create(frameRGBA.cols, frameRGBA.rows, frameRGBA.ptr());

If texture or sprite can't be converted to OpenCV Mat,then is it possible to convert sf::Image to OpenGL and convert it back to cv::Mat

sf::Texture texture;
sf::Event event;
sf::Sprite sprite;
texture.loadFromImage(image);
sprite.setTexture(texture);

Below code is used to convert an OpenCV Mat image into SFML image. How to convert SFML image back to Mat image?

If texture or sprite can't be converted to OpenCV Mat,then is it possible to convert sf::Image to OpenGL and convert it back to cv::Mat

Update: I referred this post, but still was not able to convert.

    void* buffer = ℑ 
    cv::Mat image_mat = cv::Mat(cvSize(500, 500),CV_8UC4, buffer, cv::Mat::AUTO_STEP);  
    cvtColor(image_mat, converted,CV_RGBA2BGR);

It crashes at below line of code (when i display image )

imshow("img", converted);