Simulating Video on QLabel or QGraphicsView

[wysota]

Yes, I'm using OpenGL. It's portable and fast enough (probably even on software) and gives easy ways of manipulating the image displayed (like making it full screen). Using QWidget with a QLabel or whatever is sooo slow - I doubt I'd achieve 25fps and full screen. For smaller streams you can surely write data directly to QImage and render it on a widget or graphicsview (QGraphicsViewMovieItem?).

A side question - how much work would it be to render an OpenGL item on the graphics view? I'm not an expert on QGL, but it should be possible using QGLFrameBufferObject, right?

[high_flyer]

Using QWidget with a QLabel or whatever is sooo slow - I doubt I'd achieve 25fps and full screen

As I said, I had no trouble doing 2 x 640x480 video streams in parallel at 30fps. with QWidget and bitBlt(), on a low end maschine.
I don't claim it is better then using OGL, I think if I would had to do it today again, I wouild go for OGL too.
I am no OGL expert either, so I can't answer your last question...