Ip camera in Qt+QGst+Raspberry Pi

[Rodrigo Angel Astorga]

hi guys, I need help to implement a viewer IP camera from a Raspberry Pi, I'm working with Qt Creator and API Qt-GStreamer, the API works well when loading in the pipeline "scrvideotest", on the other hand directly from gstreamer using the following command line "sudo gst-launch-1.0 rtspsrc location=rtsp://admin:123456@192.168.10.123:554/ <http://admin:123456@192.168.10.123:554/> ! rtph264depay ! h264parse ! omxh264dec ! autovideosink" works perfect. When I try to create the pipeline based on the above instructions do not work in program debugging errors GET_ELEMET tells me that is not rtph264depay; h264parse; omxh264dec. And I can not generate the link between the components, if they could help me create the correct instructions to create the pipeline would greatly appreciate, I copy the code on which I work.

Thank you.

My code in Qt Creator ans Qt-Gstreamer API, run in Raspberry Pi

#include <QGst/Init>
#include <QGst/Pipeline>
#include <QGst/ElementFactory>
#include <QGst/Ui/GraphicsVideoSurface>
#include <QGst/Ui/GraphicsVideoWidget>

#include <qapplication>
#include <qglwidget>
#include <qgraphicsview>
#include <qdebug>

int main(int argc, char *argv[])
{
 	QApplication a(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);

 	QGst::ElementPtr source = QGst::ElementFactory::make("rtspsrc”);
	QGst::ElementPtr demux = QGst::ElementFactory::make("rtph264depay”);
	QGst::ElementPtr parse = QGst::ElementFactory::make("h264parse”);
	QGst::ElementPtr decode = QGst::ElementFactory::make("omxh264dec");
 	QGst::ElementPtr sink = surface->videoSink();
 	QGst::PipelinePtr pipeline = QGst::Pipeline::create();
	
	source->SetProperty(“location”, "rtsp://admin:123456@192.168.10.123:554/ <rtsp://admin:123456@192.168.10.123:554/>“);
 	
	pipeline->add(source);
	pipeline->add(demux);
	pipeline->add(parse);
	pipeline->add(decode);
 	pipeline->add(sink);

 	if(source->link(demux) == false)
  		qDebug(“Link demux failed”);
	if(demux->link(parse) == false)
  		qDebug("Link parse failed”);
	if(parse->link(decode) == false)
  		qDebug(“Link decode failed”);
	if(decode->link(sink) == false)
  		qDebug("Link sink failed");

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

 	return a.exec();
}


Example code in Qt Creator ans Qt-Gstreamer API, run in Raspberry Pi work fine!!

#include <QGst/Init>
#include <QGst/Pipeline>
#include <QGst/ElementFactory>
#include <QGst/Ui/GraphicsVideoSurface>
#include <QGst/Ui/GraphicsVideoWidget>

#include <qapplication>
#include <qglwidget>
#include <qgraphicsview>
#include <qdebug>

int main(int argc, char *argv[])
{
 	QApplication a(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);

 	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”);

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

 	return a.exec();
}
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