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  1. Qt
  2. QTBUG-102642

QtMultimedia ffmpeg plugin fails to build on ArchLinux

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    • Icon: Bug Bug
    • Resolution: Cannot Reproduce
    • Icon: P2: Important P2: Important
    • None
    • 6.4.0
    • Multimedia
    • None
    • Linux/Wayland

      The library list being passed to the linker appears to be broken:

       

      /../../../plugins/multimedia/libffmegmediaplugin.so CMakeFiles/QFFmpegMediaPlugin.dir/QFFmpegMediaPlugin_autogen/mocs_compilation.cpp.o CMakeFiles/QFFmpegMediaPlugin.dir/qffmpegaudiodecoder.cpp.o CMakeFiles/QFFmpegMediaPlugin.dir/qffmpegaudioinput.cpp.o CMakeFiles/QFFmpegMediaPlugin.dir/qffmpegclock.cpp.o CMakeFiles/QFFmpegMediaPlugin.dir/qffmpegdecoder.cpp.o CMakeFiles/QFFmpegMediaPlugin.dir/qffmpeghwaccel.cpp.o CMakeFiles/QFFmpegMediaPlugin.dir/qffmpegencoderoptions.cpp.o CMakeFiles/QFFmpegMediaPlugin.dir/qffmpegmediametadata.cpp.o CMakeFiles/QFFmpegMediaPlugin.dir/qffmpegmediaplayer.cpp.o CMakeFiles/QFFmpegMediaPlugin.dir/qffmpegvideosink.cpp.o CMakeFiles/QFFmpegMediaPlugin.dir/qffmpegmediaformatinfo.cpp.o CMakeFiles/QFFmpegMediaPlugin.dir/qffmpegmediaintegration.cpp.o CMakeFiles/QFFmpegMediaPlugin.dir/qffmpegvideobuffer.cpp.o CMakeFiles/QFFmpegMediaPlugin.dir/qffmpegimagecapture.cpp.o CMakeFiles/QFFmpegMediaPlugin.dir/qffmpegmediacapturesession.cpp.o CMakeFiles/QFFmpegMediaPlugin.dir/qffmpegmediarecorder.cpp.o CMakeFiles/QFFmpegMediaPlugin.dir/qffmpegencoder.cpp.o CMakeFiles/QFFmpegMediaPlugin.dir/qffmpegthread.cpp.o CMakeFiles/QFFmpegMediaPlugin.dir/qffmpegresampler.cpp.o CMakeFiles/QFFmpegMediaPlugin.dir/qffmpegvideoframeencoder.cpp.o CMakeFiles/QFFmpegMediaPlugin.dir/qffmpeghwaccel_vaapi.cpp.o CMakeFiles/QFFmpegMediaPlugin.dir/__/pulseaudio/qpulseaudiodevice.cpp.o CMakeFiles/QFFmpegMediaPlugin.dir/__/pulseaudio/qaudioengine_pulse.cpp.o CMakeFiles/QFFmpegMediaPlugin.dir/__/pulseaudio/qpulseaudiosource.cpp.o CMakeFiles/QFFmpegMediaPlugin.dir/__/pulseaudio/qpulseaudiosink.cpp.o CMakeFiles/QFFmpegMediaPlugin.dir/__/pulseaudio/qpulsehelpers.cpp.o CMakeFiles/QFFmpegMediaPlugin.dir/__/pulseaudio/qpulseaudiomediadevices.cpp.o CMakeFiles/QFFmpegMediaPlugin.dir/qv4l2camera.cpp.o  -Wl,-rpath,/home/rafael/dev/qt/qtmultimedia/build_host/lib:/home/rafael/dev/qt/qtbase/build_host/install/lib: /usr/lib/libEGL.so /usr/lib/libxkbcommon.so ../../../../lib/libQt6Multimedia.so.6.4.0 /home/rafael/dev/qt/qtbase/build_host/install/lib/libQt6Gui.so.6.4.0 /usr/lib/libGLX.so /usr/lib/libOpenGL.so /home/rafael/dev/qt/qtbase/build_host/install/lib/libQt6Network.so.6.4.0 /home/rafael/dev/qt/qtbase/build_host/install/lib/libQt6Core.so.6.4.0 -L/usr/lib -lavformat -lxml2 -lbz2 -lmodplug -lbluray -lgmp -lgnutls -lsrt -lssh /usr/lib/libavformat.so -lavcodec -lvpx -lwebpmux -lwebp -llzma -ldav1d -lopencore-amrwb -lrsvg-2 -lgio-2 -lgdk_pixbuf-2 -lgobject-2 -lglib-2 -lcairo -laom -lgsm -lmp3lame -lopencore-amrnb -lopenjp2 -lopus -lrav1e -lspeex -lpthread -ltheoraenc -ltheoradec -logg -lvorbis -lvorbisenc -lwebp -llzma -ldav1d -lopencore-amrwb -lrsvg-2 -lgio-2 -lgdk_pixbuf-2 -lgobject-2 -lglib-2 -lcairo -laom -lgsm -lmp3lame -lopencore-amrnb -lopenjp2 -lopus -lrav1e -lspeex -lpthread -ltheoraenc -ltheoradec -logg -lvorbis -lvorbisenc -lz -lx264 -lx265 -lxvidcore /usr/lib/libavcodec.so -lswresample -lsoxr /usr/lib/libswresample.so -lswscale /usr/lib/libswscale.so -lavutil -lva-drm -lva-x11 -lva -lvdpau -lm -ldrm -lmfx -lstdc /usr/lib/libavutil.so /usr/lib/libva-drm.so /usr/lib/libva.so /usr/lib/libpulse.so -Wl,-rpath-link,/home/rafael/dev/qt/qtbase/build_host/install/lib 
/usr/bin/ld: cannot find -lgio-2: No such file or directory
/usr/bin/ld: cannot find -lgdk_pixbuf-2: No such file or directory
/usr/bin/ld: cannot find -lgobject-2: No such file or directory
/usr/bin/ld: cannot find -lglib-2: No such file or directory
/usr/bin/ld: cannot find -lgio-2: No such file or directory
/usr/bin/ld: cannot find -lgdk_pixbuf-2: No such file or directory
/usr/bin/ld: cannot find -lgobject-2: No such file or directory
/usr/bin/ld: cannot find -lglib-2: No such file or directory
/usr/bin/ld: cannot find -lstdc: No such file or directory
collect2: error: ld returned 1 exit status

      In my system, there's no libgio-2.so, but rather libgio-2.0.so, for instance.

      I've traced the the regression to commit 3b9c6202a188645123f36479ee39c0c5e5e5f950

      https://codereview.qt-project.org/c/qt/qtmultimedia/+/402715

       

      I'm guessing __ffmpeg_internal_set_dependencies is leaning on assumptions that do not hold true on certain platforms.

      Reverting the commit did the trick for me, locally.

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            piotr Piotr Srebrny (Inactive)
            rafaelroquetto Rafael Roquetto
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              Created:
              Updated:
              Resolved:

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