<div dir="ltr"> <div class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"> *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? </blockquote><div>This example seg faults on my machine at the sink->setProperty("glcontext"...) call. I have a Ubuntu 12.10, 32-bit pc with QtGstreamer compiled. </div><div>I've not used QtGstreamer this way, so can;t say anything immediately. This will need further investigation. </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"> *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()? </blockquote><div> </div><div>If using QtGstreamer, you don't have to create the qtvideosink/qtglvideosink element explicitly. The docs mention that one will be created for you internally. </div><div>From the video surface class docs: "<span style="color:rgb(0,0,0);font-family:'Lucida Grande',Verdana,Geneva,Arial,sans-serif;font-size:12.8px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:12.8px;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);display:inline!important;float:none">This class internally creates and uses either a "qtglvideosink" or a "qtvideosink" element. This element is created the first time it is requested and a reference is kept internally." </div><div><span style="color:rgb(0,0,0);font-family:'Lucida Grande',Verdana,Geneva,Arial,sans-serif;font-size:12.8px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:12.8px;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);display:inline!important;float:none">So in case using "with QtGstreamer", the previous example that worked seems to be the right approach. </div><div><span style="color:rgb(0,0,0);font-family:'Lucida Grande',Verdana,Geneva,Arial,sans-serif;font-size:12.8px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:12.8px;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);display:inline!important;float:none">HTH, </div><div><span style="color:rgb(0,0,0);font-family:'Lucida Grande',Verdana,Geneva,Arial,sans-serif;font-size:12.8px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:12.8px;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);display:inline!important;float:none">-mandeep </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"> 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></div>