set image raw data buffer to QMediaPlayer - qt

Question

I want to get a screen shot of the widget application and then set its raw data buffer to QMeidaPlayer with setMedia(). What I have done so far is to receive the image, SAVE it, and then read from it. However, I would like to ask you how to read raw data directly without saving it into media player:
QPixmap originalPixmap = QPixmap::grabWidget(this);
QImage *image = new QImage(originalPixmap.toImage());
QByteArray ba;
QBuffer buffer(&ba);
buffer.setBuffer(&ba);
buffer.open(QIODevice::WriteOnly);
image->save(&buffer); // writes image into ba in PNG format
image->save(image Path);
mediaPlayer.setMedia(QUrl::fromLocalFile(image path)); //I want this to read from raw data
mediaPlayer.play();
I want this to take the minimum CPU usage. However, saving and reading from file consumes lots of CPU,47%.
Cheers,
Update: I tested the program with this code snippet as well. But it does not draw the buffer contents on video widget.
QBuffer *buffer = new QBuffer(image_ba);
QMediaContent media;
mediaPlayer.setMedia(media, buffer);
mediaPlayer.play();
Any ideas how I can resolve this to input image raw data to video widget?

Answer 1

here's how you can do it:
QPixmap originalPixmap = QPixmap::grabWidget(this);
QBuffer *buffer = new QBuffer(); // make sure that your buffer has the same life span as your media player, or otherwise the media player would try to read data from non-existing buffer. (the setMedia() and play() methods are non-blocking)
buffer.open(QIODevice::ReadWrite);
originalPixmap.save(buffer, "PNG"); // can be any other format, not just PNG
mediaPlayer.setMedia(QUrl(), buffer);
mediaPlayer.play();