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Reinstall Qt5 with QtMultimedia using Ubuntu Mate

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  • X Xenoshell

    @SGaist Well ok i found with ./configure -help all the commands i wanted. Sadly i get a error:

    ERROR: Feature 'alsa' was enabled, but the pre-condition 'config.unix && !config.qnx && libs.alsa' failed.
    
    ERROR: Feature 'gstreamer' was enabled, but the pre-condition 'features.gstreamer_1_0 || features.gstreamer_0_10' failed.
    
    ERROR: Feature 'pulseaudio' was enabled, but the pre-condition 'libs.pulseaudio' failed.
    
    ERROR: Feature 'alsa' was enabled, but the pre-condition 'config.unix && libs.alsa' failed.
    
    ERROR: Feature 'pulseaudio' was enabled, but the pre-condition 'libs.pulseaudio' failed.
    
    ERROR: Feature 'system-ffmpeg' was enabled, but the pre-condition 'libs.ffmpeg && features.system-opus && features.system-webp' failed.
    

    Seems like not everything i wanted got downloaded. What can i do to fix that?

    jsulmJ Offline
    jsulmJ Offline
    jsulm
    Lifetime Qt Champion
    wrote on last edited by
    #14

    @Xenoshell That's what @SGaist is trying to tell you: you need to install dev packages for all multimedia components you would like to use with QtMultimedia.

    https://forum.qt.io/topic/113070/qt-code-of-conduct

    X 1 Reply Last reply
    0
    • jsulmJ jsulm

      @Xenoshell That's what @SGaist is trying to tell you: you need to install dev packages for all multimedia components you would like to use with QtMultimedia.

      X Offline
      X Offline
      Xenoshell
      wrote on last edited by
      #15

      @jsulm yeah ok.. thanks, i am going a little bit mental here. I thought i already installed gstreamer. Thats why i was confused. I think i know now what to do

      jsulmJ 1 Reply Last reply
      0
      • X Xenoshell

        @jsulm yeah ok.. thanks, i am going a little bit mental here. I thought i already installed gstreamer. Thats why i was confused. I think i know now what to do

        jsulmJ Offline
        jsulmJ Offline
        jsulm
        Lifetime Qt Champion
        wrote on last edited by
        #16

        @Xenoshell You installed GStreamer but not its development packages (which for example contain the header files). You need to install the dev packages as well.

        https://forum.qt.io/topic/113070/qt-code-of-conduct

        X 1 Reply Last reply
        1
        • jsulmJ jsulm

          @Xenoshell You installed GStreamer but not its development packages (which for example contain the header files). You need to install the dev packages as well.

          X Offline
          X Offline
          Xenoshell
          wrote on last edited by
          #17

          @jsulm
          I installed alsa, dbus, gstreamer, ffmpeg but they still show up as errors. What can i do?

          ERROR: Feature 'dbus-linked' was enabled, but the pre-condition 'features.dbus && libs.dbus' failed.
          
          ERROR: Feature 'alsa' was enabled, but the pre-condition 'config.unix && !config.qnx && libs.alsa' failed.
          
          ERROR: Feature 'gstreamer_1_0' was enabled, but the pre-condition 'libs.gstreamer_1_0' failed.
          
          ERROR: Feature 'alsa' was enabled, but the pre-condition 'config.unix && libs.alsa' failed.
          
          ERROR: Feature 'system-ffmpeg' was enabled, but the pre-condition 'libs.ffmpeg && features.system-opus && features.system-webp' failed.
          
          
          jsulmJ 1 Reply Last reply
          0
          • X Xenoshell

            @jsulm
            I installed alsa, dbus, gstreamer, ffmpeg but they still show up as errors. What can i do?

            ERROR: Feature 'dbus-linked' was enabled, but the pre-condition 'features.dbus && libs.dbus' failed.
            
            ERROR: Feature 'alsa' was enabled, but the pre-condition 'config.unix && !config.qnx && libs.alsa' failed.
            
            ERROR: Feature 'gstreamer_1_0' was enabled, but the pre-condition 'libs.gstreamer_1_0' failed.
            
            ERROR: Feature 'alsa' was enabled, but the pre-condition 'config.unix && libs.alsa' failed.
            
            ERROR: Feature 'system-ffmpeg' was enabled, but the pre-condition 'libs.ffmpeg && features.system-opus && features.system-webp' failed.
            
            
            jsulmJ Offline
            jsulmJ Offline
            jsulm
            Lifetime Qt Champion
            wrote on last edited by
            #18

            @Xenoshell What exactly did you install? You need *-dev packages.

            https://forum.qt.io/topic/113070/qt-code-of-conduct

            X 1 Reply Last reply
            1
            • jsulmJ jsulm

              @Xenoshell What exactly did you install? You need *-dev packages.

              X Offline
              X Offline
              Xenoshell
              wrote on last edited by
              #19

              @jsulm i didnt found any -dev packages. I just searched google for packages to those features that create errors and installed those but didnt saw any -dev packages

              1 Reply Last reply
              0
              • SGaistS Offline
                SGaistS Offline
                SGaist
                Lifetime Qt Champion
                wrote on last edited by
                #20

                https://packages.ubuntu.com/artful/libgstreamer1.0-dev

                Interested in AI ? www.idiap.ch
                Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                X 1 Reply Last reply
                0
                • SGaistS SGaist

                  https://packages.ubuntu.com/artful/libgstreamer1.0-dev

                  X Offline
                  X Offline
                  Xenoshell
                  wrote on last edited by
                  #21

                  @SGaist ok thanks, i found all -dev packages for all the errors exept ffmpeg and dbus-linked.
                  ./configure output is now:

                  Note: Also available for Linux: linux-clang linux-icc
                  
                  Note: Dropped compiler flags '-pthread' when detecting library 'glib'.
                  
                  Note: Disabling X11 Accessibility Bridge: D-Bus or AT-SPI is missing.
                  
                  Note: Dropped compiler flags '-pthread' when detecting library 'gstreamer'.
                  
                  Note: Dropped compiler flags '-pthread' when detecting library 'gstreamer_app'.
                  
                  ERROR: Feature 'dbus-linked' was enabled, but the pre-condition 'features.dbus && libs.dbus' failed.
                  
                  ERROR: Feature 'system-ffmpeg' was enabled, but the pre-condition 'libs.ffmpeg && features.system-opus && features.system-webp' failed.
                  
                  Check config.log for details.
                  

                  Do i actually need ffmpeg for qtMultimedia? Since it is a videoplayer i guess yes. I think i have to install this from source to and that could be a real pain..

                  jsulmJ 1 Reply Last reply
                  0
                  • SGaistS Offline
                    SGaistS Offline
                    SGaist
                    Lifetime Qt Champion
                    wrote on last edited by
                    #22

                    You can install libavcodec-dev and friends for ffmpeg inclusion.

                    As for dbus, the dbus dev package.

                    Interested in AI ? www.idiap.ch
                    Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                    X 1 Reply Last reply
                    1
                    • X Xenoshell

                      @SGaist ok thanks, i found all -dev packages for all the errors exept ffmpeg and dbus-linked.
                      ./configure output is now:

                      Note: Also available for Linux: linux-clang linux-icc
                      
                      Note: Dropped compiler flags '-pthread' when detecting library 'glib'.
                      
                      Note: Disabling X11 Accessibility Bridge: D-Bus or AT-SPI is missing.
                      
                      Note: Dropped compiler flags '-pthread' when detecting library 'gstreamer'.
                      
                      Note: Dropped compiler flags '-pthread' when detecting library 'gstreamer_app'.
                      
                      ERROR: Feature 'dbus-linked' was enabled, but the pre-condition 'features.dbus && libs.dbus' failed.
                      
                      ERROR: Feature 'system-ffmpeg' was enabled, but the pre-condition 'libs.ffmpeg && features.system-opus && features.system-webp' failed.
                      
                      Check config.log for details.
                      

                      Do i actually need ffmpeg for qtMultimedia? Since it is a videoplayer i guess yes. I think i have to install this from source to and that could be a real pain..

                      jsulmJ Offline
                      jsulmJ Offline
                      jsulm
                      Lifetime Qt Champion
                      wrote on last edited by
                      #23

                      @Xenoshell Why do you want to install ffmpeg from source? Install libavcodec-dev package from your Linux distribution.

                      https://forum.qt.io/topic/113070/qt-code-of-conduct

                      1 Reply Last reply
                      1
                      • SGaistS SGaist

                        You can install libavcodec-dev and friends for ffmpeg inclusion.

                        As for dbus, the dbus dev package.

                        X Offline
                        X Offline
                        Xenoshell
                        wrote on last edited by Xenoshell
                        #24

                        @SGaist i installed your suggested packages and now output is:

                        Note: Also available for Linux: linux-clang linux-icc
                        
                        Note: Dropped compiler flags '-pthread' when detecting library 'glib'.
                        
                        Note: Disabling X11 Accessibility Bridge: D-Bus or AT-SPI is missing.
                        
                        Note: Dropped compiler flags '-pthread' when detecting library 'gstreamer'.
                        
                        Note: Dropped compiler flags '-pthread' when detecting library 'gstreamer_app'.
                        
                        ERROR: Feature 'system-ffmpeg' was enabled, but the pre-condition 'libs.ffmpeg && features.system-opus && features.system-webp' failed.
                        
                        

                        @Jsulm i dont want to install ffmpeg from source. I just installed already the package and the error still occurs and i just googled the problem and the solution was to install from source

                        1 Reply Last reply
                        0
                        • SGaistS Offline
                          SGaistS Offline
                          SGaist
                          Lifetime Qt Champion
                          wrote on last edited by
                          #25

                          Check the logs for the related errors. You can also use the -v option to get a more verbose output of the configuration process.

                          Interested in AI ? www.idiap.ch
                          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                          X 1 Reply Last reply
                          1
                          • SGaistS SGaist

                            Check the logs for the related errors. You can also use the -v option to get a more verbose output of the configuration process.

                            X Offline
                            X Offline
                            Xenoshell
                            wrote on last edited by
                            #26

                            @SGaist I think i found the relevant piece of information in config.log

                            looking for library ffmpeg
                            Trying source 0 (type pkgConfig) of library ffmpeg ...
                            + /usr/bin/pkg-config --exists --silence-errors libavcodec libavformat libavutil
                            pkg-config did not find package.
                              => source produced no result.
                            test config.qtwebengine.libraries.ffmpeg FAILED
                            executing config test ninja
                            Building own ninja
                            test config.qtwebengine.tests.ninja FAILED
                            looking for library opus
                            Trying source 0 (type pkgConfig) of library opus ...
                            + /usr/bin/pkg-config --exists --silence-errors opus
                            pkg-config did not find package.
                              => source produced no result.
                            test config.qtwebengine.libraries.opus FAILED
                            executing config test re2
                            + cd /home/blz/Downloads/qt-everywhere-opensource-src-5.9.3/config.tests/re2 && /home/blz/Downloads/qt-everywhere-opensource-src-5.9.3/qtbase/bin/qmake "CONFIG -= qt debug_and_release app_bundle lib_bundle" "CONFIG += shared use_gold_linker warn_off console single_arch" /home/blz/Downloads/qt-everywhere-opensource-src-5.9.3/qtwebengine/config.tests/re2
                            + cd /home/blz/Downloads/qt-everywhere-opensource-src-5.9.3/config.tests/re2 && MAKEFLAGS= /usr/bin/make clean && MAKEFLAGS= /usr/bin/make
                            > rm -f re2.o
                            > rm -f *~ core *.core
                            > g++ -c -pipe -O2 -std=gnu++11 -w -fPIC  -I/home/blz/Downloads/qt-everywhere-opensource-src-5.9.3/qtwebengine/config.tests/re2 -I. -I/home/blz/Downloads/qt-everywhere-opensource-src-5.9.3/qtbase/mkspecs/linux-g++ -o re2.o /home/blz/Downloads/qt-everywhere-opensource-src-5.9.3/qtwebengine/config.tests/re2/re2.cpp
                            > /home/blz/Downloads/qt-everywhere-opensource-src-5.9.3/qtwebengine/config.tests/re2/re2.cpp:29:21: fatal error: re2/re2.h: No such file or directory
                            > compilation terminated.
                            > Makefile:1021: recipe for target 're2.o' failed
                            > make: *** [re2.o] Error 1
                            test config.qtwebengine.tests.re2 FAILED
                            looking for library webp
                            Trying source 0 (type pkgConfig) of library webp ...
                            + /usr/bin/pkg-config --exists --silence-errors libwebp libwebpdemux
                            pkg-config did not find package.
                              => source produced no result.
                            test config.qtwebengine.libraries.webp FAILED
                            
                            1 Reply Last reply
                            0
                            • SGaistS Offline
                              SGaistS Offline
                              SGaist
                              Lifetime Qt Champion
                              wrote on last edited by
                              #27

                              Install the libavformat and libavutil dev packages. Same goes for opus.

                              Interested in AI ? www.idiap.ch
                              Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                              X 1 Reply Last reply
                              0
                              • X Offline
                                X Offline
                                Xenoshell
                                wrote on last edited by Xenoshell
                                #28

                                @SGaist no error anymore. Thanks for you help. I am gonna mark this solved after i ran make and make install

                                1 Reply Last reply
                                0
                                • SGaistS SGaist

                                  Install the libavformat and libavutil dev packages. Same goes for opus.

                                  X Offline
                                  X Offline
                                  Xenoshell
                                  wrote on last edited by
                                  #29

                                  @SGaist
                                  Oh well, here are some errors.. Should i be worried or not?

                                  /usr/lib/gcc/arm-linux-gnueabihf/5/../../../arm-linux-gnueabihf/crt1.o(.text+0x28): error: undefined reference to 'main'
                                  collect2: error: ld returned 1 exit status
                                  Makefile:81: recipe for target 'schema' failed
                                  make[4]: *** [schema] Error 1
                                  make[4]: Leaving directory '/home/blz/Downloads/qt-everywhere-opensource-src-5.9.3/qtxmlpatterns/examples/xmlpatterns/schema'
                                  Makefile:122: recipe for target 'sub-schema-make_first' failed
                                  make[3]: *** [sub-schema-make_first] Error 2
                                  make[3]: Leaving directory '/home/blz/Downloads/qt-everywhere-opensource-src-5.9.3/qtxmlpatterns/examples/xmlpatterns'
                                  Makefile:44: recipe for target 'sub-xmlpatterns-make_first' failed
                                  make[2]: *** [sub-xmlpatterns-make_first] Error 2
                                  make[2]: Leaving directory '/home/blz/Downloads/qt-everywhere-opensource-src-5.9.3/qtxmlpatterns/examples'
                                  Makefile:97: recipe for target 'sub-examples-make_first' failed
                                  make[1]: *** [sub-examples-make_first] Error 2
                                  make[1]: Leaving directory '/home/blz/Downloads/qt-everywhere-opensource-src-5.9.3/qtxmlpatterns'
                                  Makefile:282: recipe for target 'module-qtxmlpatterns-make_first' failed
                                  make: *** [module-qtxmlpatterns-make_first] Error 2
                                  

                                  I am gonna not use make install just yet, because errors and wait for your answer.

                                  JonBJ 1 Reply Last reply
                                  0
                                  • X Xenoshell

                                    @SGaist
                                    Oh well, here are some errors.. Should i be worried or not?

                                    /usr/lib/gcc/arm-linux-gnueabihf/5/../../../arm-linux-gnueabihf/crt1.o(.text+0x28): error: undefined reference to 'main'
                                    collect2: error: ld returned 1 exit status
                                    Makefile:81: recipe for target 'schema' failed
                                    make[4]: *** [schema] Error 1
                                    make[4]: Leaving directory '/home/blz/Downloads/qt-everywhere-opensource-src-5.9.3/qtxmlpatterns/examples/xmlpatterns/schema'
                                    Makefile:122: recipe for target 'sub-schema-make_first' failed
                                    make[3]: *** [sub-schema-make_first] Error 2
                                    make[3]: Leaving directory '/home/blz/Downloads/qt-everywhere-opensource-src-5.9.3/qtxmlpatterns/examples/xmlpatterns'
                                    Makefile:44: recipe for target 'sub-xmlpatterns-make_first' failed
                                    make[2]: *** [sub-xmlpatterns-make_first] Error 2
                                    make[2]: Leaving directory '/home/blz/Downloads/qt-everywhere-opensource-src-5.9.3/qtxmlpatterns/examples'
                                    Makefile:97: recipe for target 'sub-examples-make_first' failed
                                    make[1]: *** [sub-examples-make_first] Error 2
                                    make[1]: Leaving directory '/home/blz/Downloads/qt-everywhere-opensource-src-5.9.3/qtxmlpatterns'
                                    Makefile:282: recipe for target 'module-qtxmlpatterns-make_first' failed
                                    make: *** [module-qtxmlpatterns-make_first] Error 2
                                    

                                    I am gonna not use make install just yet, because errors and wait for your answer.

                                    JonBJ Offline
                                    JonBJ Offline
                                    JonB
                                    wrote on last edited by
                                    #30

                                    @Xenoshell
                                    Just to let you know: I am the person who tried to help with your original "why I am unable to use the camera without freezing?" question!

                                    I see this thread is getting long, I do hope my advice to sort out your multimedia installation fully is worth it for all this compiling etc. you're doing, and not a red-herring...!!

                                    1 Reply Last reply
                                    0
                                    • SGaistS Offline
                                      SGaistS Offline
                                      SGaist
                                      Lifetime Qt Champion
                                      wrote on last edited by SGaist
                                      #31

                                      Don't build the tests nor the example, especially since your are cross-compiling. There's no use for that and you'll waste space, time and electricity for nothing.

                                      Interested in AI ? www.idiap.ch
                                      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                                      X 1 Reply Last reply
                                      1
                                      • SGaistS SGaist

                                        Don't build the tests nor the example, especially since your are cross-compiling. There's no use for that and you'll waste space, time and electricity for nothing.

                                        X Offline
                                        X Offline
                                        Xenoshell
                                        wrote on last edited by Xenoshell
                                        #32

                                        @SGaist So are the errors now important or can i just install without worries?
                                        @JonB I just wanna cross out all possibilities what could be wrong

                                        jsulmJ 1 Reply Last reply
                                        0
                                        • X Xenoshell

                                          @SGaist So are the errors now important or can i just install without worries?
                                          @JonB I just wanna cross out all possibilities what could be wrong

                                          jsulmJ Offline
                                          jsulmJ Offline
                                          jsulm
                                          Lifetime Qt Champion
                                          wrote on last edited by
                                          #33

                                          @Xenoshell As you can see from what you posted those errors are coming from examples. As @SGaist suggested there is no need to build examples and tests (so, no these errors are not important). Use -skip to not to build examples and tests.

                                          https://forum.qt.io/topic/113070/qt-code-of-conduct

                                          X 1 Reply Last reply
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