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</o:shapelayout></xml><![endif]--></head><body lang=PL link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hello <o:p></o:p></p><p class=MsoNormal> <span lang=EN-US>I have a problem with connection the OMX Camera many times from two separate application. In one time only one application is connected. One is to <b>record video</b> second to <b>preview camera</b>. The recording video start new application and stop it, when stop recording. This application is written in the C. The preview camera is written in the qt and qml.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> If I start the preview camera and close it – hole application and the start the recording it works. But it not work in other situations. Open preview camera do not close pipeline then start recording - this works(for recording), but when I back to preview - it show black screen. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>When I close pipeline after preview camera, start new instance of preview camera too, close it and then start recording, stop recording and back to the preview camera in the new instance – the same situation - black screen.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>So connection to the camera works only when I start every time new instance. When I only close pipeline it does not work. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>The another problem (which force starting every time new instance for preview camera ) is when I try to connect to the OMX Camera(connection that’s mean open pipeline and close) from preview more than 3 times. Next try throw exception (the 4<sup>th</sup> one): <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>“0:01:09.161913529 [333m 2786 [00m 0xad40a9c0 [31;01mERROR [00m [00m omx gstomx_core.c:645:EventHandler:<omxcamera0> [00m unrecoverable error: The hardware failed to respond as expected (0x80001009)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>0:01:09.169485672 [333m 2786 [00m 0xad405200 [31;01mERROR [00m [00m omx gstomx_core.c:645:EventHandler:<omxcamera2> [00m unrecoverable error: The hardware failed to respond as expected (0x80001009)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>0:01:09.170829117 [333m 2786 [00m 0xad405220 [31;01mERROR [00m [00m omx gstomx_core.c:645:EventHandler:<omxcamera1> [00m unrecoverable error: The hardware failed to respond as expected (0x80001009)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>You can say that this is a problem with hardware – but why it works when I restart application, not only pipeline.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>To close pipeline I do:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>Pipeline->sendEvent(QGst::EosEvent::create())<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>In the handle message method:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>Pipeline->setState(QGst::StateNull);<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>Pipeline.clear();<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>The procedure open pipeline source code:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>QGst::PipelinePtr m_pipeline;<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>QGst::ElementPtr m_videoSink;<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>QGst::ElementPtr m_convert;<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>QGst::ElementPtr elementOmxCamera;<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>QSharedPointer<QDeclarativeView> viewer;<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>….<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>QGst::Ui::GraphicsVideoSurface *surface = new QGst::Ui::GraphicsVideoSurface(&(*viewer) );<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>viewer->rootContext()->setContextProperty(QLatin1String("videoSurface1"), surface);<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>m_videoSink = surface->videoSink();<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>elementOmxCamera = QGst::ElementFactory::make(“omx_camera”);<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>elementOmxCamera->setProperty("device",1);<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>elementOmxCamera->setProperty("mode",1);<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>QGst::CapsPtr caps = QGst::Caps::createSimple("video/x-raw-yuv");<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>caps->setValue("width", 320);<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>caps->setValue("height",240);<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>caps->setValue("framerate", QGst::Fraction(20, 1));<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>m_pipeline->add(elementOmxCamera);<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>m_pipeline->add(m_videoSink);<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>m_convert = QGst::ElementFactory::make("colorspace");<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>m_pipeline->add(m_convert);<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>elementOmxCamera->link("src",m_convert, "sink", caps);<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>m_convert->link(m_videoSink);<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>m_pipeline->setState(QGst::StatePlaying);<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>QGst::BusPtr bus = m_pipeline->bus();<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>bus->addSignalWatch();<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>QGlib::connect(bus, "message", this, &CameraSettingsController::onBusMessage);<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:PL'>Best regards<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:PL'>Andrzej Sekowski<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div></body></html>