<div dir="ltr"><div><div><div><div><div>Hi Robert, </div>I think you should read-up a little about Qt graphics-view a little before attempting to use the QtGstreamer OpenGL widget. As I mentioned in previous mail you will need to create a graphics scene, add a view to to it and then add the video widget to the scene to make it work. </div>I thought it worked for you after you made those changes (according to your last mail thread - "QtGStreamer: How to get run a QGst::Ui::GraphicsVideoWidget")? </div>Here's your example with the required modifications done: int main(int argc, char *argv[]) { QApplication app(argc, argv); QGst::init(&argc, &argv); QGraphicsScene* scene = new QGraphicsScene; QGraphicsView* view = new QGraphicsView(scene); view->setViewport(new QGLWidget); QGst::Ui::GraphicsVideoSurface* surface = new QGst::Ui::GraphicsVideoSurface(view); QGst::Ui::GraphicsVideoWidget* widget = new QGst::Ui::GraphicsVideoWidget(); widget->setSurface(surface); scene->addItem(widget); QGst::ElementPtr source = QGst::ElementFactory::make("videotestsrc"); QGst::ElementPtr sink = surface->videoSink(); QGst::PipelinePtr pipeline = QGst::Pipeline::create(); pipeline->add(source); pipeline->add(sink); if(source->link(sink) == false) qDebug("Link failed"); view->show(); pipeline->setState(QGst::StatePlaying); return app.exec(); } </div>HTH, </div> -mandeep <div><div><div> </div></div></div></div><div class="gmail_extra"> <div class="gmail_quote">On Sun, Mar 24, 2013 at 7:53 PM, pfarmer <<a href="mailto:flacone@gmx.de" target="_blank">flacone@gmx.de</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">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 <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/qt-gstreamer/html/qtvideosink_overview.html" target="_blank">http://gstreamer.freedesktop.org/data/doc/gstreamer/head/qt-gstreamer/html/qtvideosink_overview.html</a> <<a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/qt-gstreamer/html/qtvideosink_overview.html" target="_blank">http://gstreamer.freedesktop.org/data/doc/gstreamer/head/qt-gstreamer/html/qtvideosink_overview.html</a> > : 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. -- View this message in context: <a href="http://gstreamer-devel.966125.n4.nabble.com/Usage-of-the-qtglvideosink-tp4659243.html" target="_blank">http://gstreamer-devel.966125.n4.nabble.com/Usage-of-the-qtglvideosink-tp4659243.html</a> Sent from the GStreamer-devel mailing list archive at Nabble.com. _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a> <a href="http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" target="_blank">http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> </blockquote></div> </div>