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Audio not playing from .qrc resources

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  • Xena_oX Xena_o

    screenshot

    for some reasons this code is not fine, i added #include <QFile>

    seems cannot use audio from resources

    @kshegunov it is available for reading, the test of opening it from local directory works well, seems just from resources it wont open

    kshegunovK Offline
    kshegunovK Offline
    kshegunov
    Moderators
    wrote on last edited by kshegunov
    #8

    @Xena_o said in Audio not playing from .qrc resources:

    for some reasons this code is not fine, i added #include <QFile>

    Yet didn't check the QMediaPlayer::setMedia documentation - the inline annotations already tell you something's wrong on that row. The QMediaContent object has an implicit constructor from QUrl that's why you can use QUrl directly. Try something like:

    QFile file(":/music/sound.mp3"); //< QFile doesn't know about protocols
    if (file.open(QFile::Read))
      player->setMedia(QMediaContent(nullptr), &file);
    else
      qDebug() << "Oops!";
    

    @kshegunov it is available for reading, the test of opening it from local directory works well, seems just from resources it wont open

    Available for reading from the resource! Also please answer the question as well.

    Read and abide by the Qt Code of Conduct

    Xena_oX 1 Reply Last reply
    1
    • kshegunovK kshegunov

      @Xena_o said in Audio not playing from .qrc resources:

      for some reasons this code is not fine, i added #include <QFile>

      Yet didn't check the QMediaPlayer::setMedia documentation - the inline annotations already tell you something's wrong on that row. The QMediaContent object has an implicit constructor from QUrl that's why you can use QUrl directly. Try something like:

      QFile file(":/music/sound.mp3"); //< QFile doesn't know about protocols
      if (file.open(QFile::Read))
        player->setMedia(QMediaContent(nullptr), &file);
      else
        qDebug() << "Oops!";
      

      @kshegunov it is available for reading, the test of opening it from local directory works well, seems just from resources it wont open

      Available for reading from the resource! Also please answer the question as well.

      Xena_oX Offline
      Xena_oX Offline
      Xena_o
      wrote on last edited by Xena_o
      #9

      @kshegunov here is final code

      QFile file(":/music/music/sound.mp3");
          if (file.open(QIODevice::ReadOnly)) {
            player->setMedia(QMediaContent(nullptr), &file);
          } else {
            qDebug() << "Oops!";
          }
      

      the accepted code is : QIODevice::ReadOnly and not QFile::Read
      the file is in resources.qrc, i dont know how to figure if it is available

      the ouptput: no oops, and QMediaPlayer::NoError QMediaPlayer::LoadingMedia

      but still the sound is not playing. so far if i well understand, it is loading it, but thats it, not playing

      player->setVolume(50);
          player->play();
      

      this is doing nothing

      kshegunovK 1 Reply Last reply
      0
      • Xena_oX Xena_o

        @kshegunov here is final code

        QFile file(":/music/music/sound.mp3");
            if (file.open(QIODevice::ReadOnly)) {
              player->setMedia(QMediaContent(nullptr), &file);
            } else {
              qDebug() << "Oops!";
            }
        

        the accepted code is : QIODevice::ReadOnly and not QFile::Read
        the file is in resources.qrc, i dont know how to figure if it is available

        the ouptput: no oops, and QMediaPlayer::NoError QMediaPlayer::LoadingMedia

        but still the sound is not playing. so far if i well understand, it is loading it, but thats it, not playing

        player->setVolume(50);
            player->play();
        

        this is doing nothing

        kshegunovK Offline
        kshegunovK Offline
        kshegunov
        Moderators
        wrote on last edited by
        #10

        @Xena_o said in Audio not playing from .qrc resources:

        the accepted code is : QIODevice::ReadOnly and not QFile::Read

        Yes, I don't compile example code before I post it, so there may be minor errors.

        What does this output, have you checked the signals that are raised?

        QObject::connect(player, &QMediaPlayer::bufferStatusChanged, this, [this] (int percent) -> void  {
            qDebug() << "QMediaPlayer::bufferStatusChanged" << percent;
        });
        QObject::connect(player, &QMediaPlayer::durationChanged, this, [this] (qint64 duration) -> void  {
            qDebug() << "QMediaPlayer::durationChanged" << duration;
        });
        QObject::connect(player, &QMediaPlayer::error, this, [this] (QMediaPlayer::Error code) -> void  {
            qDebug() << "QMediaPlayer::Error" << code;
        });
        QObject::connect(player, &QMediaPlayer::mediaStatusChanged, this, [this] (QMediaPlayer::MediaStatus status) -> void  {
            qDebug() << "QMediaPlayer::mediaStatusChanged" << status;
        });
        QObject::connect(player, &QMediaPlayer::stateChanged, this, [this] (QMediaPlayer::State state) -> void  {
            qDebug() << "QMediaPlayer::stateChanged" << state;
        });
        
        QFile file(":/music/music/sound.mp3");
        if (file.open(QIODevice::ReadOnly)) {
            player->setMedia(QMediaContent(nullptr), &file);
        } else {
            qDebug() << "Oops!";
        }
        player->setVolume(50);
        player->play();
        

        Read and abide by the Qt Code of Conduct

        1 Reply Last reply
        0
        • Xena_oX Offline
          Xena_oX Offline
          Xena_o
          wrote on last edited by
          #11

          @kshegunov alright it is saying the media is invalid :

          QMediaPlayer::mediaStatusChanged QMediaPlayer::LoadingMedia
          QMediaPlayer::stateChanged QMediaPlayer::PlayingState
          QMediaPlayer::mediaStatusChanged QMediaPlayer::InvalidMedia

          but that is not true, it is an mp3 file, and it is reading from local directory, so why is it invalid from Resources ?!

          kshegunovK 1 Reply Last reply
          0
          • Xena_oX Xena_o

            @kshegunov alright it is saying the media is invalid :

            QMediaPlayer::mediaStatusChanged QMediaPlayer::LoadingMedia
            QMediaPlayer::stateChanged QMediaPlayer::PlayingState
            QMediaPlayer::mediaStatusChanged QMediaPlayer::InvalidMedia

            but that is not true, it is an mp3 file, and it is reading from local directory, so why is it invalid from Resources ?!

            kshegunovK Offline
            kshegunovK Offline
            kshegunov
            Moderators
            wrote on last edited by
            #12

            As I said make absolutely certain that the file can be read.

            const QString filePath(":/music/sound.mp3")
            Q_ASSERT(QFile::exists(filePath));
            ...
            QFile file(filePath);
            if (file.open(QIODevice::ReadOnly)) {
               ...
            

            Read and abide by the Qt Code of Conduct

            1 Reply Last reply
            0
            • Xena_oX Offline
              Xena_oX Offline
              Xena_o
              wrote on last edited by Xena_o
              #13

              @kshegunov Q_ASSERT(QFile::exists(filePath)); is not outputing anything and app is not crashing, so this means the file is available right? but still it is an invalid media, i tried to convert to .wav but still it is an invalid media !

              1 Reply Last reply
              0
              • Xena_oX Offline
                Xena_oX Offline
                Xena_o
                wrote on last edited by Xena_o
                #14

                i saw a post where people are copying the audio file from the resources file to a temporary local directory, then playing it from the local directory, then deleting it.

                This means it is not possible to play audio from resources, its kind of insane, isnt it ?

                Pl45m4P 1 Reply Last reply
                0
                • Xena_oX Offline
                  Xena_oX Offline
                  Xena_o
                  wrote on last edited by
                  #15
                  const QString filePath(":/music/music/sound.mp3");
                      Q_ASSERT(QFile::exists(filePath));
                  
                      QFile file2(QDir::tempPath() + "/temp0.mp3");
                  
                      if (file2.open(QIODevice::ReadWrite))
                      {
                          QFile workFile(filePath);
                          if(workFile.open(QIODevice::ReadOnly))
                          {
                            file2.write(workFile.readAll());
                            workFile.close();
                          }
                  
                          file2.close();
                      }
                      player->setMedia(QUrl::fromLocalFile((QDir::tempPath() + "/temp0.mp3")));
                      player->setVolume(50);
                      player->play();
                  

                  this code is working, but its too bad i need to copy from resources to temporary file to be able to play the audio, that is bad...

                  1 Reply Last reply
                  0
                  • Xena_oX Xena_o

                    i saw a post where people are copying the audio file from the resources file to a temporary local directory, then playing it from the local directory, then deleting it.

                    This means it is not possible to play audio from resources, its kind of insane, isnt it ?

                    Pl45m4P Offline
                    Pl45m4P Offline
                    Pl45m4
                    wrote on last edited by Pl45m4
                    #16

                    @Xena_o said in Audio not playing from .qrc resources:

                    This means it is not possible to play audio from resources, its kind of insane, isnt it ?

                    I don't think that it's not possible.
                    Have you tried it using QSound instead of QMediaPlayer?

                    @aha_1980 said that it worked:

                    • https://forum.qt.io/topic/88581/how-to-play-a-wav-file-that-is-defined-in-resource-file/8

                    How does your resource file look like?


                    If debugging is the process of removing software bugs, then programming must be the process of putting them in.

                    ~E. W. Dijkstra

                    Xena_oX 1 Reply Last reply
                    1
                    • Pl45m4P Pl45m4

                      @Xena_o said in Audio not playing from .qrc resources:

                      This means it is not possible to play audio from resources, its kind of insane, isnt it ?

                      I don't think that it's not possible.
                      Have you tried it using QSound instead of QMediaPlayer?

                      @aha_1980 said that it worked:

                      • https://forum.qt.io/topic/88581/how-to-play-a-wav-file-that-is-defined-in-resource-file/8

                      How does your resource file look like?

                      Xena_oX Offline
                      Xena_oX Offline
                      Xena_o
                      wrote on last edited by Xena_o
                      #17

                      @Pl45m4 wow i get a progress with this !

                      QSound::play(":/music/music/sound.mp3"); throws
                      QSoundEffect(qaudio): Error decoding source file::/music/music/sound.mp3

                      but

                      QSound::play(":/music/music/sound.wav"); (i converted the file) this one is WORKING !

                      too bad it doesnt handle mp3 or maybe i need add extra params, will look it.

                      edit: seems QSound do not support mp3, too bad, well wav is better than nothing

                      thanks to everybody for participation and help :-)

                      1 Reply Last reply
                      2
                      • nageshN Offline
                        nageshN Offline
                        nagesh
                        wrote on last edited by nagesh
                        #18

                        @Xena_o I have checked by adding .mp3 files to resource in QT musicplayer example,
                        and it's working perfectly fine.

                        I have accessed the url using

                        QUrl url = QUrl("qrc:///music/sound.mp3");
                         player->setMedia(url);
                        player->play();
                        

                        looks like there is no need to copy into temp file.

                        Got hint from Qt Doc for resources
                        https://doc.qt.io/qt-5/resources.html

                        For example, the file path :/images/cut.png or the URL qrc:///images/cut.png would give 
                        access to the cut.png file, whose location in the application's source tree 
                        is images/cut.png.
                        
                        Xena_oX 1 Reply Last reply
                        4
                        • nageshN nagesh

                          @Xena_o I have checked by adding .mp3 files to resource in QT musicplayer example,
                          and it's working perfectly fine.

                          I have accessed the url using

                          QUrl url = QUrl("qrc:///music/sound.mp3");
                           player->setMedia(url);
                          player->play();
                          

                          looks like there is no need to copy into temp file.

                          Got hint from Qt Doc for resources
                          https://doc.qt.io/qt-5/resources.html

                          For example, the file path :/images/cut.png or the URL qrc:///images/cut.png would give 
                          access to the cut.png file, whose location in the application's source tree 
                          is images/cut.png.
                          
                          Xena_oX Offline
                          Xena_oX Offline
                          Xena_o
                          wrote on last edited by
                          #19

                          @nagesh wonderful ! thank you ! i tested it is working. AMediaPlayer offers more control than QSound.

                          1 Reply Last reply
                          0
                          • 8Observer88 Offline
                            8Observer88 Offline
                            8Observer8
                            wrote on last edited by 8Observer8
                            #20

                            My example works with Qt 6.2.4. You can download it from DropBox here. Many thanks to the guys in this topic: How to play sounds using QMediaPlayer

                            media-player-qt6-cpp.pro

                            QT       += core gui multimedia
                            
                            greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
                            
                            CONFIG += c++17
                            
                            # You can make your code fail to compile if it uses deprecated APIs.
                            # In order to do so, uncomment the following line.
                            #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
                            
                            SOURCES += \
                                main.cpp \
                                widget.cpp
                            
                            HEADERS += \
                                widget.h
                            
                            # Default rules for deployment.
                            qnx: target.path = /tmp/$${TARGET}/bin
                            else: unix:!android: target.path = /opt/$${TARGET}/bin
                            !isEmpty(target.path): INSTALLS += target
                            
                            RESOURCES += \
                                audio.qrc
                            

                            widget.h

                            #ifndef WIDGET_H
                            #define WIDGET_H
                            
                            #include <QtWidgets/QWidget>
                            #include <QtMultimedia/QMediaPlayer>
                            
                            class Widget : public QWidget
                            {
                                Q_OBJECT
                            
                            public:
                                Widget(QWidget *parent = nullptr);
                                ~Widget();
                            
                            private slots:
                                void play();
                            
                            private:
                                QMediaPlayer mediaPlayer;
                            };
                            #endif // WIDGET_H
                            

                            widget.cpp

                            #include "widget.h"
                            #include <QtCore/QUrl>
                            #include <QtWidgets/QPushButton>
                            #include <QtMultimedia/QAudioOutput>
                            
                            Widget::Widget(QWidget *parent)
                                : QWidget(parent)
                            {
                                mediaPlayer.setSource(QUrl("qrc:/assets/audio/music.wav"));
                                mediaPlayer.setAudioOutput(new QAudioOutput);
                            
                                QPushButton *playButton = new QPushButton("Play", this);
                                connect(playButton, &QPushButton::pressed, this, &Widget::play);
                            
                                connect(&mediaPlayer, &QMediaPlayer::mediaStatusChanged,
                                        [=](QMediaPlayer::MediaStatus status) -> void{ qDebug() << "QMediaPlayer::mediaStatusChanged" << status;}
                                );
                            }
                            
                            Widget::~Widget()
                            {
                            }
                            
                            void Widget::play()
                            {
                                mediaPlayer.play();
                                qDebug() << "play";
                            }
                            

                            main.cpp

                            #include "widget.h"
                            
                            #include <QApplication>
                            
                            int main(int argc, char *argv[])
                            {
                                QApplication a(argc, argv);
                                Widget w;
                                w.show();
                                return a.exec();
                            }
                            
                            1 Reply Last reply
                            0
                            • JonBJ JonB referenced this topic on

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