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    Unsolved QML video playback

    QML and Qt Quick
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    • RiteshPanchal
      RiteshPanchal last edited by

      I am using Qt 5.8.0 and 5.2.1 on nVidia Jetson TX1 board with Ubuntu 14.04.
      I want to play 1080p video 30 and 60 fps using Qt Multimedia.

      here is my code. video is 1920x1080 30 fps.

      import QtQuick 2.8
      import QtMultimedia 5.7
      
      Rectangle {
          width: 800
          height: 600
          color: "black"
      
          MediaPlayer {
              id: player
              source: "file:///home/ubuntu/1.mp4"
              autoPlay: true
          }
      
          VideoOutput {
              id: videoOutput
              source: player
              anchors.fill: parent
          }
      }
      

      But the problem is that I am getting Black window for few seconds and then got first frame in repeated 4 times vertically on 800x600 application window. And that frame is also in black&white. this is with Qt 5.8.0.

      With same code but with 5.2.1 and qtquick 2.0 and qtmultimedia 5.0, i am getting single first frame after few seconds and this is also black&white.

      In both case i think frame is updated but takes around 40-50 sec to update next frame.
      Application output

      Starting /home/ubuntu/Desktop/build-Test-Desktop-Debug/Test...
      QML debugging is enabled. Only use this in a safe environment.
      Inside NvxLiteH264DecoderLowLatencyInitNvxLiteH264DecoderLowLatencyInit set DPB and MjstreamingInside NvxLiteH265DecoderLowLatencyInitNvxLiteH265DecoderLowLatencyInit set DPB and MjstreamingNvMMLiteOpen : Block : BlockType = 261 
      TVMR: NvMMLiteTVMRDecBlockOpen: 6736: NvMMLiteBlockOpen 
      NvMMLiteBlockCreate : Block : BlockType = 261 
      TVMR: cbBeginSequence: 803: BeginSequence  1920x1088, bVPR = 0
      TVMR: cbBeginSequence: 1147: DecodeBuffers = 4, pnvsi->eCodec = 4, codec = 0 
      TVMR: cbBeginSequence: 1206: Display Resolution : (1920x1080) 
      TVMR: cbBeginSequence: 1207: Display Aspect Ratio : (1920x1080) 
      TVMR: cbBeginSequence: 1247: ColorFormat : 5 
      TVMR: cbBeginSequence:1258 ColorSpace = NvColorSpace_YCbCr709
      TVMR: cbBeginSequence: 1429: SurfaceLayout = 3
      TVMR: cbBeginSequence: 1474: NumOfSurfaces = 8, InteraceStream = 0, InterlaceEnabled = 0, bSecure = 0, MVC = 0 Semiplanar = 1, bReinit = 1, BitDepthForSurface = 8
      Allocating new output: 1920x1088 (x 10), ThumbnailMode = 0
      TVMR: cbDisplayPicture: 3289: Retunred NULL Frame Buffer 
      TVMR: cbDisplayPicture: 3289: Retunred NULL Frame Buffer 
      TVMR: FrameRate = 29 
      TVMR: NVDEC LowCorner Freq = (174000 * 1024) 
      TVMR: FrameRate = 29.970180 
      TVMR: FrameRate = 29.970090 
      Warning: "A lot of buffers are being dropped."
      TVMR: FrameRate = 29.970090 
      TVMR: FrameRate = 29.970090 
      TVMR: FrameRate = 29.970090 
      TVMR: FrameRate = 29.970090
      

      So whats the problem? is Qt not using hardware accelerated playback?

      raven-worx 1 Reply Last reply Reply Quote 0
      • raven-worx
        raven-worx Moderators @RiteshPanchal last edited by

        @RiteshPanchal
        are you testing in debug mode with an debugger attached?
        If so try again in release mode without debugger. This should increase the performance drastically.

        --- SUPPORT REQUESTS VIA CHAT WILL BE IGNORED ---
        If you have a question please use the forum so others can benefit from the solution in the future

        RiteshPanchal 1 Reply Last reply Reply Quote 1
        • RiteshPanchal
          RiteshPanchal @raven-worx last edited by

          @raven-worx
          I am using in debug mode without any debugger.
          I tried build in release but no improvement.

          raven-worx 1 Reply Last reply Reply Quote 0
          • raven-worx
            raven-worx Moderators @RiteshPanchal last edited by

            @RiteshPanchal
            then i guess its most probably indeed the missing HW acceleration. What backend do you use?

            --- SUPPORT REQUESTS VIA CHAT WILL BE IGNORED ---
            If you have a question please use the forum so others can benefit from the solution in the future

            RiteshPanchal 1 Reply Last reply Reply Quote 1
            • RiteshPanchal
              RiteshPanchal last edited by

              I thinks its some problem with gstreamer-1.0 and qt.
              Because i can't play any video using Qt Multimedia example like qmlvideo, videowidget etc..

              I can play video with external 3rd party player and also with gstreamer pipeline separately.
              So whats missing now?

              raven-worx 1 Reply Last reply Reply Quote 0
              • raven-worx
                raven-worx Moderators @RiteshPanchal last edited by

                @RiteshPanchal
                you can try to set the QT_DEBUG_PLUGINS env variable to a non-zero value and check the console output. Maybe it tells something regarding the multimedia plugins.

                --- SUPPORT REQUESTS VIA CHAT WILL BE IGNORED ---
                If you have a question please use the forum so others can benefit from the solution in the future

                1 Reply Last reply Reply Quote 0
                • RiteshPanchal
                  RiteshPanchal @raven-worx last edited by

                  @raven-worx said in QML video playback:

                  you

                  nVidia TX1 supports OMX HW acceleration which support 4K encoding and decoding. I can play 4K video using gstreamer pipeline.

                  And also i have added env variable QT_DEBUG_PLUGINS to 1 in Release build . and here is application output

                  Starting /home/ubuntu/Desktop/build-Test-Desktop-Release/Test...
                  QFactoryLoader::QFactoryLoader() checking directory path "/usr/local/plugins/platforms" ...
                  QFactoryLoader::QFactoryLoader() looking at "/usr/local/plugins/platforms/libqeglfs.so"
                  Found metadata in lib /usr/local/plugins/platforms/libqeglfs.so, metadata=
                  {
                      "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                      "MetaData": {
                          "Keys": [
                              "eglfs"
                          ]
                      },
                      "className": "QEglFSIntegrationPlugin",
                      "debug": false,
                      "version": 329728
                  }
                  
                  
                  Got keys from plugin meta data ("eglfs")
                  QFactoryLoader::QFactoryLoader() looking at "/usr/local/plugins/platforms/libqlinuxfb.so"
                  Found metadata in lib /usr/local/plugins/platforms/libqlinuxfb.so, metadata=
                  {
                      "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                      "MetaData": {
                          "Keys": [
                              "linuxfb"
                          ]
                      },
                      "className": "QLinuxFbIntegrationPlugin",
                      "debug": false,
                      "version": 329728
                  }
                  
                  
                  Got keys from plugin meta data ("linuxfb")
                  QFactoryLoader::QFactoryLoader() looking at "/usr/local/plugins/platforms/libqminimal.so"
                  Found metadata in lib /usr/local/plugins/platforms/libqminimal.so, metadata=
                  {
                      "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                      "MetaData": {
                          "Keys": [
                              "minimal"
                          ]
                      },
                      "className": "QMinimalIntegrationPlugin",
                      "debug": false,
                      "version": 329728
                  }
                  
                  
                  Got keys from plugin meta data ("minimal")
                  QFactoryLoader::QFactoryLoader() looking at "/usr/local/plugins/platforms/libqminimalegl.so"
                  Found metadata in lib /usr/local/plugins/platforms/libqminimalegl.so, metadata=
                  {
                      "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                      "MetaData": {
                          "Keys": [
                              "minimalegl"
                          ]
                      },
                      "className": "QMinimalEglIntegrationPlugin",
                      "debug": false,
                      "version": 329728
                  }
                  
                  
                  Got keys from plugin meta data ("minimalegl")
                  QFactoryLoader::QFactoryLoader() looking at "/usr/local/plugins/platforms/libqoffscreen.so"
                  Found metadata in lib /usr/local/plugins/platforms/libqoffscreen.so, metadata=
                  {
                      "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                      "MetaData": {
                          "Keys": [
                              "offscreen"
                          ]
                      },
                      "className": "QOffscreenIntegrationPlugin",
                      "debug": false,
                      "version": 329728
                  }
                  
                  
                  Got keys from plugin meta data ("offscreen")
                  QFactoryLoader::QFactoryLoader() looking at "/usr/local/plugins/platforms/libqvnc.so"
                  Found metadata in lib /usr/local/plugins/platforms/libqvnc.so, metadata=
                  {
                      "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                      "MetaData": {
                          "Keys": [
                              "vnc"
                          ]
                      },
                      "className": "QVncIntegrationPlugin",
                      "debug": false,
                      "version": 329728
                  }
                  
                  
                  Got keys from plugin meta data ("vnc")
                  QFactoryLoader::QFactoryLoader() looking at "/usr/local/plugins/platforms/libqxcb.so"
                  Found metadata in lib /usr/local/plugins/platforms/libqxcb.so, metadata=
                  {
                      "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                      "MetaData": {
                          "Keys": [
                              "xcb"
                          ]
                      },
                      "className": "QXcbIntegrationPlugin",
                      "debug": false,
                      "version": 329728
                  }
                  
                  
                  Got keys from plugin meta data ("xcb")
                  QFactoryLoader::QFactoryLoader() checking directory path "/home/ubuntu/Desktop/build-Test-Desktop-Release/platforms" ...
                  loaded library "/usr/local/plugins/platforms/libqxcb.so"
                  loaded library "Xcursor"
                  QFactoryLoader::QFactoryLoader() checking directory path "/usr/local/plugins/xcbglintegrations" ...
                  QFactoryLoader::QFactoryLoader() looking at "/usr/local/plugins/xcbglintegrations/libqxcb-egl-integration.so"
                  Found metadata in lib /usr/local/plugins/xcbglintegrations/libqxcb-egl-integration.so, metadata=
                  {
                      "IID": "org.qt-project.Qt.QPA.Xcb.QXcbGlIntegrationFactoryInterface.5.5",
                      "MetaData": {
                          "Keys": [
                              "xcb_egl"
                          ]
                      },
                      "className": "QXcbEglIntegrationPlugin",
                      "debug": false,
                      "version": 329728
                  }
                  
                  
                  Got keys from plugin meta data ("xcb_egl")
                  QFactoryLoader::QFactoryLoader() looking at "/usr/local/plugins/xcbglintegrations/libqxcb-glx-integration.so"
                  Found metadata in lib /usr/local/plugins/xcbglintegrations/libqxcb-glx-integration.so, metadata=
                  {
                      "IID": "org.qt-project.Qt.QPA.Xcb.QXcbGlIntegrationFactoryInterface.5.5",
                      "MetaData": {
                          "Keys": [
                              "xcb_glx"
                          ]
                      },
                      "className": "QXcbGlxIntegrationPlugin",
                      "debug": false,
                      "version": 329728
                  }
                  
                  
                  Got keys from plugin meta data ("xcb_glx")
                  QFactoryLoader::QFactoryLoader() checking directory path "/home/ubuntu/Desktop/build-Test-Desktop-Release/xcbglintegrations" ...
                  loaded library "/usr/local/plugins/xcbglintegrations/libqxcb-glx-integration.so"
                  QFactoryLoader::QFactoryLoader() checking directory path "/usr/local/plugins/platformthemes" ...
                  QFactoryLoader::QFactoryLoader() looking at "/usr/local/plugins/platformthemes/libqgtk3.so"
                  Found metadata in lib /usr/local/plugins/platformthemes/libqgtk3.so, metadata=
                  {
                      "IID": "org.qt-project.Qt.QPA.QPlatformThemeFactoryInterface.5.1",
                      "MetaData": {
                          "Keys": [
                              "gtk3"
                          ]
                      },
                      "className": "QGtk3ThemePlugin",
                      "debug": false,
                      "version": 329728
                  }
                  
                  
                  Got keys from plugin meta data ("gtk3")
                  QFactoryLoader::QFactoryLoader() checking directory path "/home/ubuntu/Desktop/build-Test-Desktop-Release/platformthemes" ...
                  QFactoryLoader::QFactoryLoader() checking directory path "/usr/local/plugins/platforminputcontexts" ...
                  QFactoryLoader::QFactoryLoader() looking at "/usr/local/plugins/platforminputcontexts/libcomposeplatforminputcontextplugin.so"
                  Found metadata in lib /usr/local/plugins/platforminputcontexts/libcomposeplatforminputcontextplugin.so, metadata=
                  {
                      "IID": "org.qt-project.Qt.QPlatformInputContextFactoryInterface.5.1",
                      "MetaData": {
                          "Keys": [
                              "compose",
                              "xim"
                          ]
                      },
                      "className": "QComposePlatformInputContextPlugin",
                      "debug": false,
                      "version": 329728
                  }
                  
                  
                  Got keys from plugin meta data ("compose", "xim")
                  QFactoryLoader::QFactoryLoader() looking at "/usr/local/plugins/platforminputcontexts/libibusplatforminputcontextplugin.so"
                  Found metadata in lib /usr/local/plugins/platforminputcontexts/libibusplatforminputcontextplugin.so, metadata=
                  {
                      "IID": "org.qt-project.Qt.QPlatformInputContextFactoryInterface.5.1",
                      "MetaData": {
                          "Keys": [
                              "ibus"
                          ]
                      },
                      "className": "QIbusPlatformInputContextPlugin",
                      "debug": false,
                      "version": 329728
                  }
                  
                  
                  Got keys from plugin meta data ("ibus")
                  QFactoryLoader::QFactoryLoader() looking at "/usr/local/plugins/platforminputcontexts/libqtvirtualkeyboardplugin.so"
                  Found metadata in lib /usr/local/plugins/platforminputcontexts/libqtvirtualkeyboardplugin.so, metadata=
                  {
                      "IID": "org.qt-project.Qt.QPlatformInputContextFactoryInterface.5.1",
                      "MetaData": {
                          "Keys": [
                              "qtvirtualkeyboard"
                          ]
                      },
                      "className": "QVirtualKeyboardPlugin",
                      "debug": false,
                      "version": 329728
                  }
                  
                  
                  Got keys from plugin meta data ("qtvirtualkeyboard")
                  QFactoryLoader::QFactoryLoader() checking directory path "/home/ubuntu/Desktop/build-Test-Desktop-Release/platforminputcontexts" ...
                  loaded library "/usr/local/plugins/platforminputcontexts/libcomposeplatforminputcontextplugin.so"
                  Found metadata in lib /usr/local/qml/QtQuick.2/libqtquick2plugin.so, metadata=
                  {
                      "IID": "org.qt-project.Qt.QQmlExtensionInterface/1.0",
                      "MetaData": {
                      },
                      "className": "QtQuick2Plugin",
                      "debug": false,
                      "uri": [
                          "QtQuick.2"
                      ],
                      "version": 329728
                  }
                  
                  
                  loaded library "/usr/local/qml/QtQuick.2/libqtquick2plugin.so"
                  Found metadata in lib /usr/local/qml/QtMultimedia/libdeclarative_multimedia.so, metadata=
                  {
                      "IID": "org.qt-project.Qt.QQmlExtensionInterface/1.0",
                      "MetaData": {
                      },
                      "className": "QMultimediaDeclarativeModule",
                      "debug": false,
                      "uri": [
                          "QtMultimedia"
                      ],
                      "version": 329728
                  }
                  
                  
                  loaded library "/usr/local/qml/QtMultimedia/libdeclarative_multimedia.so"
                  QFactoryLoader::QFactoryLoader() checking directory path "/usr/local/plugins/mediaservice" ...
                  QFactoryLoader::QFactoryLoader() looking at "/usr/local/plugins/mediaservice/libgstaudiodecoder.so"
                  Found metadata in lib /usr/local/plugins/mediaservice/libgstaudiodecoder.so, metadata=
                  {
                      "IID": "org.qt-project.qt.mediaserviceproviderfactory/5.0",
                      "MetaData": {
                          "Keys": [
                              "gstreameraudiodecode"
                          ],
                          "Services": [
                              "org.qt-project.qt.audiodecode"
                          ]
                      },
                      "className": "QGstreamerAudioDecoderServicePlugin",
                      "debug": false,
                      "version": 329728
                  }
                  
                  
                  Got keys from plugin meta data ("gstreameraudiodecode")
                  QFactoryLoader::QFactoryLoader() looking at "/usr/local/plugins/mediaservice/libgstcamerabin.so"
                  Found metadata in lib /usr/local/plugins/mediaservice/libgstcamerabin.so, metadata=
                  {
                      "IID": "org.qt-project.qt.mediaserviceproviderfactory/5.0",
                      "MetaData": {
                          "Keys": [
                              "gstreamercamerabin"
                          ],
                          "Services": [
                              "org.qt-project.qt.camera"
                          ]
                      },
                      "className": "CameraBinServicePlugin",
                      "debug": false,
                      "version": 329728
                  }
                  
                  
                  Got keys from plugin meta data ("gstreamercamerabin")
                  QFactoryLoader::QFactoryLoader() looking at "/usr/local/plugins/mediaservice/libgstmediacapture.so"
                  Found metadata in lib /usr/local/plugins/mediaservice/libgstmediacapture.so, metadata=
                  {
                      "IID": "org.qt-project.qt.mediaserviceproviderfactory/5.0",
                      "MetaData": {
                          "Keys": [
                              "gstreamermediacapture"
                          ],
                          "Services": [
                              "org.qt-project.qt.audiosource"
                          ]
                      },
                      "className": "QGstreamerCaptureServicePlugin",
                      "debug": false,
                      "version": 329728
                  }
                  
                  
                  Got keys from plugin meta data ("gstreamermediacapture")
                  QFactoryLoader::QFactoryLoader() looking at "/usr/local/plugins/mediaservice/libgstmediaplayer.so"
                  Found metadata in lib /usr/local/plugins/mediaservice/libgstmediaplayer.so, metadata=
                  {
                      "IID": "org.qt-project.qt.mediaserviceproviderfactory/5.0",
                      "MetaData": {
                          "Keys": [
                              "gstreamermediaplayer"
                          ],
                          "Services": [
                              "org.qt-project.qt.mediaplayer"
                          ]
                      },
                      "className": "QGstreamerPlayerServicePlugin",
                      "debug": false,
                      "version": 329728
                  }
                  
                  
                  Got keys from plugin meta data ("gstreamermediaplayer")
                  QFactoryLoader::QFactoryLoader() checking directory path "/home/ubuntu/Desktop/build-Test-Desktop-Release/mediaservice" ...
                  loaded library "/usr/local/plugins/mediaservice/libgstmediaplayer.so"
                  QFactoryLoader::QFactoryLoader() checking directory path "/usr/local/plugins/resourcepolicy" ...
                  QFactoryLoader::QFactoryLoader() checking directory path "/home/ubuntu/Desktop/build-Test-Desktop-Release/resourcepolicy" ...
                  QFactoryLoader::QFactoryLoader() checking directory path "/usr/local/plugins/video/declarativevideobackend" ...
                  QFactoryLoader::QFactoryLoader() checking directory path "/home/ubuntu/Desktop/build-Test-Desktop-Release/video/declarativevideobackend" ...
                  QFactoryLoader::QFactoryLoader() checking directory path "/usr/local/plugins/video/videonode" ...
                  QFactoryLoader::QFactoryLoader() checking directory path "/home/ubuntu/Desktop/build-Test-Desktop-Release/video/videonode" ...
                  QFactoryLoader::QFactoryLoader() checking directory path "/usr/local/plugins/video/gstvideorenderer" ...
                  QFactoryLoader::QFactoryLoader() checking directory path "/home/ubuntu/Desktop/build-Test-Desktop-Release/video/gstvideorenderer" ...
                  QFactoryLoader::QFactoryLoader() checking directory path "/usr/local/plugins/accessiblebridge" ...
                  QFactoryLoader::QFactoryLoader() checking directory path "/home/ubuntu/Desktop/build-Test-Desktop-Release/accessiblebridge" ...
                  Inside NvxLiteH264DecoderLowLatencyInitNvxLiteH264DecoderLowLatencyInit set DPB and MjstreamingInside NvxLiteH265DecoderLowLatencyInitNvxLiteH265DecoderLowLatencyInit set DPB and MjstreamingNvMMLiteOpen : Block : BlockType = 261 
                  TVMR: NvMMLiteTVMRDecBlockOpen: 6736: NvMMLiteBlockOpen 
                  NvMMLiteBlockCreate : Block : BlockType = 261 
                  TVMR: cbBeginSequence: 803: BeginSequence  1920x1088, bVPR = 0
                  TVMR: cbBeginSequence: 1147: DecodeBuffers = 4, pnvsi->eCodec = 4, codec = 0 
                  TVMR: cbBeginSequence: 1206: Display Resolution : (1920x1080) 
                  TVMR: cbBeginSequence: 1207: Display Aspect Ratio : (1920x1080) 
                  TVMR: cbBeginSequence: 1247: ColorFormat : 5 
                  TVMR: cbBeginSequence:1258 ColorSpace = NvColorSpace_YCbCr709
                  TVMR: cbBeginSequence: 1429: SurfaceLayout = 3
                  TVMR: cbBeginSequence: 1474: NumOfSurfaces = 8, InteraceStream = 0, InterlaceEnabled = 0, bSecure = 0, MVC = 0 Semiplanar = 1, bReinit = 1, BitDepthForSurface = 8
                  Allocating new output: 1920x1088 (x 10), ThumbnailMode = 0
                  QFactoryLoader::QFactoryLoader() checking directory path "/usr/local/plugins/accessible" ...
                  QFactoryLoader::QFactoryLoader() checking directory path "/home/ubuntu/Desktop/build-Test-Desktop-Release/accessible" ...
                  TVMR: cbDisplayPicture: 3289: Retunred NULL Frame Buffer 
                  TVMR: FrameRate = 29 
                  TVMR: NVDEC LowCorner Freq = (174000 * 1024) 
                  TVMR: FrameRate = 29.970180 
                  TVMR: FrameRate = 29.970090 
                  Warning: "A lot of buffers are being dropped."
                  
                  raven-worx 1 Reply Last reply Reply Quote 1
                  • raven-worx
                    raven-worx Moderators @RiteshPanchal last edited by

                    @RiteshPanchal
                    hmm...the plugin log looks good.

                    But this line looks suspicious:
                    TVMR: cbDisplayPicture: 3289: Retunred NULL Frame Buffer

                    I am not a linux guru, so i am not much of a help here from now on :/

                    --- SUPPORT REQUESTS VIA CHAT WILL BE IGNORED ---
                    If you have a question please use the forum so others can benefit from the solution in the future

                    RiteshPanchal 1 Reply Last reply Reply Quote 0
                    • RiteshPanchal
                      RiteshPanchal @raven-worx last edited by

                      @raven-worx said in QML video playback:

                      I am not a linux guru, so i am not much of a help here from now on :/

                      Ya its ok.. But thanks for your great help.

                      1 Reply Last reply Reply Quote 0
                      • P
                        peteritv last edited by

                        @RiteshPanchal

                        I am no guru either, but it looks to me that your linux setup is using the default framebuffer video driver (linuxfb in your case, which is a software driver) instead of the hardware accelerated NVidea driver.

                        I assume that is not true, and you can play the video with a standard player at full HD resolution (1920x1080 30fps)?

                        RiteshPanchal 1 Reply Last reply Reply Quote 0
                        • RiteshPanchal
                          RiteshPanchal @peteritv last edited by

                          @peteritv said in QML video playback:

                          you can play the video with a standard player at full HD resolution (1920x1080 30fps)?

                          After Fresh flashing ubuntu 14.04 to nVidia TX1. I can't play 1080p .mp4 video using totem player (ubuntu default video player). But after installing some missing codec using below command i can play those video smoothly.

                          sudo apt-get install ubuntu-restricted-extras
                          

                          I can also play even 4K@30fps video using gstreamer pipeline using OMX HW acceleration.
                          But still i am not able to play any .mp4 videos using VLC player on TX1. I am getting Black screen while playing the video.

                          I think still some codec are missing that's causing this issue to vlc and also to Qt.
                          I searched on net says ffmpeg is missing so i downloaded the source and compiled the latest version to TX1 but still Black video output to VLC and also TVMR: cbDisplayPicture: 3289: Retunred NULL Frame Buffer in Qt.

                          So waiting for some reply from TX1.

                          1 Reply Last reply Reply Quote 0
                          • P
                            peteritv last edited by

                            @RiteshPanchal

                            Mmmm... Still sounds like a driver problem to me (which is not unusual for any Linux with NVidea). Does sound work when you try to play?

                            Could you post your /etc/X11/xorg.conf file (X configuration) ?
                            And what does the X log (errors "EE" and warnings "WW") show ?

                            grep "EE\|WW" /var/log/Xorg.0.log
                            

                            Looks like a nice device btw, that TX1 :)

                            RiteshPanchal 1 Reply Last reply Reply Quote 0
                            • RiteshPanchal
                              RiteshPanchal @peteritv last edited by RiteshPanchal

                              @peteritv said in QML video playback:

                              Does sound work when you try to play?

                              Yes. Sound works when i play .mp4 video with vlc.

                              etc/X11/xorg.conf

                              # Copyright (c) 2015, NVIDIA CORPORATION.  All Rights Reserved.
                              #
                              # This is the minimal configuration necessary to use the Tegra driver.
                              # Please refer to the xorg.conf man page for more configuration
                              # options provided by the X server, including display-related options
                              # provided by RandR 1.2 and higher.
                              
                              # Disable extensions not useful on Tegra.
                              Section "Module"
                                  Disable     "dri"
                                  SubSection  "extmod"
                                  Option  "omit xfree86-dga"
                                  EndSubSection
                              EndSection
                              
                              Section "Device"
                                  Identifier  "Tegra0"
                                  Driver      "nvidia"
                                  Option      "AllowEmptyInitialConfiguration" "true"
                              EndSection
                              
                              Section "Monitor"
                                 Identifier "DSI-0"
                                 Option    "Ignore"
                              EndSection
                              

                              grep "EE|WW" /var/log/Xorg.0.log

                              [    13.176] Current Operating System: Linux tegra-ubuntu 3.10.67 #46 SMP PREEMPT Tue Sep 13 14:54:38 IST 2016 aarch64
                              	(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
                              [    13.189] (WW) The directory "/usr/share/fonts/X11/cyrillic" does not exist.
                              [    13.189] (WW) The directory "/usr/share/fonts/X11/100dpi/" does not exist.
                              [    13.189] (WW) The directory "/usr/share/fonts/X11/75dpi/" does not exist.
                              [    13.189] (WW) The directory "/usr/share/fonts/X11/100dpi" does not exist.
                              [    13.189] (WW) The directory "/usr/share/fonts/X11/75dpi" does not exist.
                              [    13.191] Initializing built-in extension MIT-SCREEN-SAVER
                              [    13.191] (WW) "dri" will not be loaded unless you've specified it to be loaded elsewhere.
                              [    13.191] (WW) "xmir" is not to be loaded by default. Skipping.
                              [    13.349] (WW) Falling back to old probe method for NVIDIA
                              [    13.411] (EE) NVIDIA(GPU-0): Failed to initialize client
                              [    13.520] (WW) NVIDIA(GPU-0): Failed to enter interactive mode. 
                              [    13.528] (EE) NVIDIA(0): Failed to allocate NVIDIA Error Handler
                              [    14.092] (EE) NVIDIA(0): Failed to allocate NVIDIA Damage Manager
                              
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                                peteritv last edited by

                                @RiteshPanchal
                                As expected (by me, not by you) it seems that your driver does not play well with Linux.

                                What you could try, is to completely remove the NVidia driver from your device. That way, when the system boots up again, it will fall back to the native "nuveau" software driver, which is slower of course, but usually works!

                                See:
                                http://askubuntu.com/questions/206283/how-can-i-uninstall-a-nvidia-driver-completely

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                                  peteritv last edited by

                                  NVidia has a very sad history of supporting Linux...

                                  With ur TX1, I would have voted they would have gotten it right,
                                  TX1 is a NVidia thing, right?
                                  Ur development kit comes from NVidia, right?

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                                    peteritv last edited by

                                    May I assume that Ubuntu is not the native OS that TX1 supplies?

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                                      peteritv last edited by

                                      What native OS does the TX1 come with?

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                                        peteritv last edited by

                                        Out of the Box?

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                                          peteritv last edited by

                                          I am not just a fool answering here...
                                          I have had 30+ years experience on embedded software and devices.

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                                            peteritv last edited by

                                            And I can tell you: NVidia sucks

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