Can't get duration video with a QMediaPlayer

saxoalex

Hi everybody !
I'm trying to get the duration of a video that I play with a QMediaPlayer but this don't work. I tried a lot of things like :
myplayer->duration(quint64); but it didn't worked.

I saw that I could do that with signals but whene I try, the application say this following error message : "
signals :
void QMediaPlayer::durationChanged(qint64 duration);

Here is my cpp :

//In a function 1
    videowidget = new QVideoWidget(this);
    player = new QMediaPlayer(videowidget);
    player -> setVideoOutput(videowidget);
    videowidget->setAspectRatioMode(Qt::KeepAspectRatio);

//In a function 2
player->setMedia(QUrl::fromLocalFile("/home/alexandre/Documents/qt/pt2_v3.1/video/decompte.mp4"));
      player->play();
      connect(player, SIGNAL(durationChanged(duration)), this, SLOT(Temps(to, duration)));

Here is my class code :

class Window : public QWidget
{
public :
    qint64 duration;
    QMediaPlayer *player;
    QVideoWidget *videowidget;
};

My function Temps :

void Window::Temps(int to, qint64 duration)
{

    //Countdown
    std::cout <<"Durée avant réduction="<<duration<< std::endl;
    time = duration - 10; // On retire 10s aux temps du media pour declencher les boutons avant
    std::cout << "Durée après réduction=" <<time<< std::endl;

    //Timer duraction
    timer = new QTimer;
    timer->setSingleShot(true);
    timer->start(time);

    connect(timer, &QTimer::timeout, [this, to]
    {
        this->Attente_boutons(to);
    });
}

There is many other thing in my code but they don't concern my player.

Thank's !
Alexandre.

saxoalex

I tried that whithout my wired signal :

void Window::Temps(int to)
{
    std::cout<<"Passage par Temps"<<std::endl;
    qint64 duration=player->duration();
    std::cout<<"Duration="<<duration<<std::endl;
    Reini_boutons();
    //Compte à rebour
    time = duration - 10; // On retire 10s aux temps du media pour declencher les boutons avant
    std::cout << "Time=" <<time<< std::endl;
    //Declaration du timer
    timer = new QTimer;
    timer->setSingleShot(true);
    timer->start(time);

    connect(timer, &QTimer::timeout, [this, to]
    {
        this->Attente_boutons(to);
    });
}

time is a member qint64.

Here,
Duration=-1
Time=-11

raven-worx

@saxoalex
then most probably the used codec can't determine the duration.
Have you tried with another video file to check against?

saxoalex

Hi !
I tried with a h264,mpeg2 and v210 codec. I have the same result...

saxoalex

Someone have a solution please ?