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Qt Android MediaPlayer for .mp3 files not working

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  • M Offline
    M Offline
    MarcoDC
    wrote 18 days ago last edited by
    #1

    Hey there :D

    I am almost done with porting my app from Qt5.15.17 QMake to Qt6.9.1 CMake :DDD
    Last thing I noticed is that for some reason playing an .mp3 sound file does not work anymore :/

    Previously there were no problems,
    but after switching to the new version I receive output like

    I/qt.multimedia.ffmpeg(30077): Using Qt multimedia with FFmpeg version 7.1.1 LGPL version 2.1 or later
    ...
    W/AudioCapabilities(30077): Unsupported mime audio/ac4
    W/AudioCapabilities(30077): Unsupported mime audio/x-ima
    W/AudioCapabilities(30077): Unsupported mime audio/eac3-joc
    W/AudioCapabilities(30077): Unsupported mime audio/evrc
    W/AudioCapabilities(30077): Unsupported mime audio/mpeg-L1
    W/AudioCapabilities(30077): Unsupported mime audio/mpeg-L2
    W/AudioCapabilities(30077): Unsupported mime audio/qcelp
    W/AudioCapabilities(30077): Unsupported mime audio/x-ms-wma
    W/AudioCapabilities(30077): Unsupported mime audio/evrc
    W/AudioCapabilities(30077): Unsupported mime audio/qcelp
    W/VideoCapabilities(30077): Unrecognized profile 4 for video/hevc
    W/VideoCapabilities(30077): Unsupported mime video/mp43
    W/VideoCapabilities(30077): Unrecognized profile/level 1/32 for video/mp4v-es
    W/VideoCapabilities(30077): Unrecognized profile/level 32768/2 for video/mp4v-es
    W/VideoCapabilities(30077): Unrecognized profile/level 32768/64 for video/mp4v-es
    W/VideoCapabilities(30077): Unsupported mime video/wvc1
    

    on startup,
    and when trying to play my set .mp3 file just:

    W/ ( 8481): 273 - 2 2025-06-25 15:31:34.397 QAudioSink::start: QAudioFormat not supported by QAudioDevice >> :0 ()

    Why is that? The Android device I am using is the same as before and this worked perfectly using Qt5.15.

    I put some code in my main.cpp to print supported formats like

    QAudioDevice device = QMediaDevices::defaultAudioOutput();
    qDebug() << "Supported sample formats:";
    for (auto fmt : device.supportedSampleFormats())
        qDebug() << "  " << fmt;
    
    QAudioFormat format = device.preferredFormat();
    qDebug() << "Sample rate:" << format.sampleRate();
    qDebug() << "Channel count:" << format.channelCount();
    qDebug() << "Sample format:" << format.sampleFormat();
    

    and received this output:

    D/default (30077): Supported sample formats:
    D/default (30077): Int16
    D/default (30077): Sample rate: 48000
    D/default (30077): Channel count: 2
    D/default (30077): Sample format: Int16

    Because I did not find a real solution to this problem I just converted my .mp3 file to a .wav file which seems to work, but has an 10 times increased file size that also is reflected in the resulting apk/aab binary :/

    Is anyone aware of a solution that allows me to continue playing .mp3 files on my Android device? This also works fine on iOS and macOS builds

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    • M Offline
      M Offline
      MarcoDC
      wrote 13 days ago last edited by
      #6

      seems like this was actually a bug and should be fixed in Qt6.10: https://bugreports.qt.io/browse/QTBUG-138057

      So for no I am using .wav files instead and wait for Qt to release 6.10 stable

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      • M Offline
        M Offline
        MarcoDC
        wrote 18 days ago last edited by
        #2

        Ah I forgot, in my root project CMakeLists I just add Multimedia package to link against:

        find_package(Qt6 REQUIRED COMPONENTS Quick Qml QuickControls2 ... Multimedia)
        target_link_libraries(${PROJECT_NAME} PRIVATE
            Qt::Concurrent
            Qt::Qml
            Qt::Quick
            Qt::QuickControls2
            ...
            Qt::Multimedia
        )
        

        For iOS I needed to add

        # Add FFMpeg lib for MediaPlayer support
        qt_add_ios_ffmpeg_libraries(${PROJECT_NAME})
        

        for audio to work at all, macOS does not need any additional stuff

        So maybe there is some dependency for Android that I am just missing?

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        • J Offline
          J Offline
          JoeCFD
          wrote 18 days ago last edited by JoeCFD
          #3

          both audio and video encoders/decoders have to be added in your android build.

          M 1 Reply Last reply 17 days ago
          0
          • J JoeCFD
            18 days ago

            both audio and video encoders/decoders have to be added in your android build.

            M Offline
            M Offline
            MarcoDC
            wrote 17 days ago last edited by
            #4

            Hey @JoeCFD thanks for your answer :D

            How/where to I do this?

            J 1 Reply Last reply 17 days ago
            0
            • M MarcoDC
              17 days ago

              Hey @JoeCFD thanks for your answer :D

              How/where to I do this?

              J Offline
              J Offline
              JoeCFD
              wrote 17 days ago last edited by JoeCFD
              #5

              @MarcoDC If gstreamer(you may use FFmpeg) build for Android is downloaded, the libs and plugins are static and can not be linked for commercial use. What I did was to build all gstreamer stuff into a single dynamic lib. Very messy! But if your app is not commercial, you can simply link static ones to your app.

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              • M Offline
                M Offline
                MarcoDC
                wrote 13 days ago last edited by
                #6

                seems like this was actually a bug and should be fixed in Qt6.10: https://bugreports.qt.io/browse/QTBUG-138057

                So for no I am using .wav files instead and wait for Qt to release 6.10 stable

                1 Reply Last reply
                0
                • M MarcoDC has marked this topic as solved 13 days ago
                • M MarcoDC has marked this topic as solved 13 days ago

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                25 Jun 2025, 14:06

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