QMediaPlayer -> Can´t get it to play

Flaming Moe

Hello Folks,

I want to use QMediaplayer to play mp3 in my Android.
I verifyed. that it in general works by trying the QT-Creator´s example project "player".

In my own stripped down project, I can´t make it play.
It´s very likely, that I don´t understand the concept, what is needed to play audio.

Also I´m not sure about the path. In my filesystem the music is under "/sdcard/Music"
In the example project I made a message Box to display the path of the added media and it shows a "File:///sdcard/Music/<filename>.mp3"
I also tried that as an URL extension when placing pathes in the playlist.

Currently as a quick shot all is done in the constructor of the widget of widget-project.

Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
    ui->setupUi(this);
    QUrl qUrl;
    
    //gathering all the files with ".mp3" type found in "/sdcard/Music"
    dir = QDir::toNativeSeparators("/sdcard/Music");
    QStringList filters;
    filters << "*.mp3";
    files = dir.entryList(filters, QDir::Files | QDir::NoSymLinks);


    ui->lcdNumber->display(files.count());//To verify, that there are found
    ui->plainTextEdit->setPlainText(files.at(3));//Randomly display the path of one file

    player = new QMediaPlayer(this);
    m_playlist = new QMediaPlaylist();
    probe = new QVideoProbe(this);// 1) do I need this for audio only?
    probe->setSource(player);// 1) do I need this for audio only?

    videoWidget = new QVideoWidget(this);// 2) do I need this for audio only?
    player->setVideoOutput(videoWidget);// 2) do I need this for audio only?

    for(unsigned int i=0; i<files.count(); i++)
    {
        //filling the found files in via URLs in the Playlist
        qUrl.clear();
        qUrl.setUrl("file:///sdcard/Music/" + files.at(i));
        m_playlist->addMedia(qUrl);
    }

    //Randomly read one location of the playlist if it has a fitting path
    ui->plainTextEdit_2->setPlainText(m_playlist->media(60).canonicalUrl().toString());
    player->setVolume(50);
    m_playlist->setCurrentIndex(1);// 3 do I need to do this?
    player->play();

}

Flaming Moe

Hm... this works....

    player = new QMediaPlayer;

    m_playlist = new QMediaPlaylist(player);
    player->setMedia(QUrl::fromLocalFile("/sdcard/Music/Adiemus.mp3"));
    // ...
    player->setVolume(50);
    m_playlist->setCurrentIndex(1);
    player->play();

mrjj

@Flaming-Moe
Hi
The working code is also almost the same except for no loop of the files so I would guess
on something with the paths

qUrl.setUrl("file:///sdcard/Music/" + files.at(i));

Flaming Moe

@Flaming-Moe said in QMediaPlayer -> Can´t get it to play:

fromLocalFile

May be it´s the difference in "fromLocalFile"