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  1. Qt
  2. QTBUG-116990

Screen recording doesn't work

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    • Linux/Yocto

      Trying to do screen capture with attached example produces media file with only audio track and no video at all.

      Multimedia logging categories enabled produces:

      (xx:2036): GStreamer-CRITICAL **: 12:08:42.406: gst_element_message_full_with_details: assertion 'GST_IS_ELEMENT (element)' failed
qt.multimedia.imageCapture: cameraActiveChanged false false
qt.multimedia.imageCapture: cameraActiveChanged false false
qt.multimedia.videooutput: sinkChanged videoSinkBin
qt.multimedia.gstvideorenderer: set_caps: "video/x-raw, format=(string)UYVY, framerate=(fraction)30000/1001, width=(int)720, height=(int)480, interlace-mode=(string)progressive, colorimetry=(string)bt601"
qt.multimedia.gstvideorenderer: QGstVideoRenderer::start "video/x-raw, format=(string)UYVY, framerate=(fraction)30000/1001, width=(int)720, height=(int)480, interlace-mode=(string)progressive, colorimetry=(string)bt601"
qt.multimedia.gstvideorenderer: set_caps: "video/x-raw, format=(string)UYVY, framerate=(fraction)30000/1001, width=(int)720, height=(int)480, interlace-mode=(string)progressive, colorimetry=(string)bt601"
qt.multimedia.gstvideorenderer: QGstVideoRenderer::start "video/x-raw, format=(string)UYVY, framerate=(fraction)30000/1001, width=(int)720, height=(int)480, interlace-mode=(string)progressive, colorimetry=(string)bt601"
qml: Main.qml init...
qt.multimedia.imageCapture: cameraActiveChanged false true
qt.multimedia.imageCapture: isReady true
qt.multimedia.gstvideorenderer: QGstVideoRenderer::render
qt.multimedia.gstvideorenderer: QGstVideoRenderer::handleEvent(renderBuffer) true QGstreamerVideoSink(0xaed738)
qt.multimedia.gstvideorenderer: sending video frame
qt.multimedia.video: updatePaintNode: Video node created. Handle type: NoHandle
qt.multimedia.gstvideorenderer: QGstVideoRenderer::render
qt.multimedia.gstvideorenderer: QGstVideoRenderer::handleEvent(renderBuffer) true QGstreamerVideoSink(0xaed738)
qt.multimedia.gstvideorenderer: sending video frame
qt.multimedia.gstvideorenderer: QGstVideoRenderer::render
qt.multimedia.gstvideorenderer: QGstVideoRenderer::handleEvent(renderBuffer) true QGstreamerVideoSink(0xaed738)
...
qt.multimedia.gstvideorenderer: QGstVideoRenderer::handleEvent(renderBuffer) true QGstreamerVideoSink(0xaed738)
qt.multimedia.gstvideorenderer: sending video frame
qt.multimedia.encoder: recording new video to QUrl("file:///home/root/record_0002.mp4")
qt.multimedia.gstvideorenderer: QGstVideoRenderer::render
...
qt.multimedia.gstvideorenderer: QGstVideoRenderer::render
qt.multimedia.gstvideorenderer: QGstVideoRenderer::handleEvent(renderBuffer) true QGstreamerVideoSink(0xaed738)
qt.multimedia.gstvideorenderer: sending video frame
qt.multimedia.encoder: stop
qt.multimedia.encoder: >>>>>>>>>>>>> sending EOS
qt.multimedia.gstvideorenderer: QGstVideoRenderer::render
qt.multimedia.gstvideorenderer: QGstVideoRenderer::handleEvent(renderBuffer) true QGstreamerVideoSink(0xaed738)
qt.multimedia.gstvideorenderer: sending video frame
qt.multimedia.encoder: received element message from pipeline "GstBinForwarded"
qt.multimedia.encoder: received EOS from filesink
qt.multimedia.encoder: finalize
qml: Media recorder stopped
qt.multimedia.encoder: received EOS from pipeline
qt.multimedia.gstvideorenderer: QGstVideoRenderer::render

        1. Record_w_overlays_bug_report.zip
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          Joni Poikelin
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            poikelin Joni Poikelin
            poikelin Joni Poikelin
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              Created:
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              Resolved:

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