QMediaPlayer - setPosition() problem

Zbigniew-Sch

I want to set start position in "QMediaPlayer" object using setPosition() function, but unfortunately it doesn't work. Does anyone have an idea how to set the starting point correctly?
Thank you.

Zbigniew

Kaguro

@Zbigniew-Sch said in QMediaPlayer - setPosition() problem:

if(status==QMediaPlayer::MediaStatus::BufferedMedia)
{
mediaPlayer->setPosition(m_iVideoPosition);
}

Works like a charm, you are my hero today! :D

SGaist

Hi,

When/How are you doing that ?
Which version of Qt ?
On which OS ?

Zbigniew-Sch

I want to start a video (mp4) from position "x" not from "0".
I have Qt version 6.4 on Windows 10

Bonnie

@Zbigniew-Sch Do you set the position before or right after you call play()?
You need wait the player to load and buffer the media.
connect the mediaStatusChanged signal and set the postion when the status is QMediaPlayer::BufferedMedia.

Zbigniew-Sch

Thank you, it works fine.
But I have the next problem, I want to start the video, then position it at position "x" and pause.
Where can I call the "pause()" function and set the position "x"?
I made several attempts, but the position (mostly is 0) is wrong or the "QVideoWidget" content is black

Bonnie

@Zbigniew-Sch Not sure what's your case, mine works when putting pause() right before or right after setPosition().
But it may depends on the media service plugin behaviour, for example when using windowsmediafoundation plugin under Windows, I just can't make the media pause.

Kaguro

Hi Guys! I have a similar problem with my code:

    QVideoWidget *vwidget = new QVideoWidget;
    QAudioOutput *audioOutput = new QAudioOutput;
    QMediaPlayer *mediaPlayer = new QMediaPlayer;

    mediaPlayer->setVideoOutput(vwidget );
    mediaPlayer->setAudioOutput(audioOutput);
    mediaPlayer->setSource(QUrl::fromLocalFile("myvideo.mp4"));
    audioOutput->setVolume(0.002);
    mediaPlayer->play();

    connect(mediaPlayer,&QMediaPlayer::mediaStatusChanged,this,[=](QMediaPlayer::MediaStatus status){
        if(status==QMediaPlayer::MediaStatus::BufferedMedia)
        {
            mediaPlayer->pause();
            mediaPlayer->setPosition(200000);
            mediaPlayer->pause();
        }

    });
    vwidget ->show();

its jump to the correct position of the video BUT the video didn't pause going on from the position... but why?:(

Zbigniew-Sch

This post is deleted!

Zbigniew-Sch

In the header file:

int m_iVideoPosition;

//======================================

mediaPlayer->setVideoOutput(vwidget);
mediaPlayer->setAudioOutput(audioOutput);
mediaPlayer->setSource(QUrl::fromLocalFile("myvideo.mp4"));
audioOutput->setVolume(0.002);
mediaPlayer->play();
m_iVideoPosition = 200000;

connect(mediaPlayer, &QMediaPlayer::positionChanged, this, &QMyMediaPlayer::positionChanged);

connect(mediaPlayer,&QMediaPlayer::mediaStatusChanged,this,[=](QMediaPlayer::MediaStatus status)
{
    if(status==QMediaPlayer::MediaStatus::BufferedMedia)
    {
        mediaPlayer->setPosition(m_iVideoPosition);
    }
}

//=======================================

void QMyMediaPlayer::positionChanged(qint64 position)
{
       if (m_iVideoPosition != 0 && position > m_iVideoPosition)
       {
             m_iVideoPosition = 0;
             pause();
       }
}

Kaguro

@Zbigniew-Sch said in QMediaPlayer - setPosition() problem:

if(status==QMediaPlayer::MediaStatus::BufferedMedia)
{
mediaPlayer->setPosition(m_iVideoPosition);
}

Works like a charm, you are my hero today! :D