Usage of the qtglvideosink

[pfarmer]

Sorry for bothering you again about an Qt related topic. But I am not able to
get the qtglvideosink running.
I tried the two ways mentioned in 
http://gstreamer.freedesktop.org/data/doc/gstreamer/head/qt-gstreamer/html/qtvideosink_overview.html
<http://gstreamer.freedesktop.org/data/doc/gstreamer/head/qt-gstreamer/html/qtvideosink_overview.html
>  :
 1) Usage without QtGStreamer
 2) Usage with QtGStreamer


*For 1 i tried this:*

#include <QGst/Init>
#include <QGst/Pipeline>
#include <QGst/ElementFactory>
#include <QGst/Ui/VideoWidget>
#include <QGlib/Connect>

#include <QApplication>
#include <QGLWidget>
#include <QDebug>

int main(int argc, char *argv[])
{
	QApplication app(argc, argv);
	QGst::init(&argc, &argv);

	QGst::ElementPtr source = QGst::ElementFactory::make("videotestsrc");
	QGst::ElementPtr sink = QGst::ElementFactory::make("qtglvideosink");

	QGLWidget* glWidget = new QGLWidget();

	glWidget->makeCurrent();
	sink->setProperty("glcontext", (void*)QGLContext::currentContext());
	glWidget->doneCurrent();

	if(sink->setState(QGst::StateReady) != QGst::StateChangeSuccess)
	{
		qWarning("Gl not available. Closing app.");
		app.exit();
	}

	QGst::PipelinePtr pipeline = QGst::Pipeline::create();
	pipeline->add(source);
	pipeline->add(sink);
	if(source->link(sink) == false)
		qDebug("Link failed");

//	QGlib::connect(sink, "update", glWidget, &QGLWidget::update());

	glWidget->show();
	pipeline->setState(QGst::StatePlaying);

	return app.exec();
}

I am not able to connect the update signal to the slot QGLWidget::update().
How can i do this? Or: do I have to do it? It also seems not enough to
solely set the QLContext to the qtglvideosink; what esle I have to do?



*And for 2 I tried this:*

int main(int argc, char *argv[])
{
	QApplication app(argc, argv);
	QGst::init(&argc, &argv);

	QGst::ElementPtr source = QGst::ElementFactory::make("videotestsrc");
	QGst::ElementPtr sink = QGst::ElementFactory::make("qtglvideosink");

	QGst::Ui::VideoWidget* widget = new QGst::Ui::VideoWidget();
//	QGLWidget* glWidget = new QGLWidget(widget);

//	glWidget->makeCurrent();
//	sink->setProperty("glcontext", (void*)QGLContext::currentContext());
//	glWidget->doneCurrent();
//	if(sink->setState(QGst::StateReady) != QGst::StateChangeSuccess)
//	{
//		qWarning("Closing app. Probably Gl not available.");
//		app.exit();
//	}

	QGst::PipelinePtr pipeline = QGst::Pipeline::create();
	pipeline->add(source);
	pipeline->add(sink);
	if(source->link(sink) == false)
		qDebug("Link failed");

	widget->setVideoSink(sink);

	pipeline->setState(QGst::StatePlaying);
	widget->show();

	return app.exec();
}

Here I don't know how to make the QGst::Ui::VideoWidget() openGL aware. I
also can't inherit both the QGLWidget and the QGst::Ui::VideoWidget in one
class since this is forbidden by Qt. How can I GL acceleration with a
QGst::Ui::VideoWidget()?

In the two cases above nothing happens, except that an empty widget pop's
up.

Thanks for any help,
Robert.



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