Media player not working for multiple videos

Devopia53

Declare QPushButton as a local variable like a mediaPlayer. A lambda function can not capture member variables of this.

aha_1980

@Devopia53 No, it can:

auto l = [this]() {
  // use members of this here
}

Kinesis

@jsulm - Yes it does not work
@Devopia53 - When I declare local variable , it works.
@aha_1980 - I will also try like U said .
Sorry for replying in the same reply . Because I am a new user . I can only post per every 600s

Kinesis

I still have a question . I replaced the slider slots into loop but I can't control the sliders and sliders are not moving when the videos are running .
Here is the slider code

QSlider *m_positionSlider = new QSlider(Qt::Horizontal);
        m_positionSlider->setRange(0, 0);

       
        connect(mediaPlayer, &QMediaPlayer::positionChanged ,[m_positionSlider, this](qint64 position){

            m_positionSlider->setValue(position);
        });

        connect(mediaPlayer, &QMediaPlayer::durationChanged ,[m_positionSlider, this](qint64 duration){

            m_positionSlider->setRange(0,duration);
        });


        connect(mediaPlayer , &QMediaPlayer::setPosition, [mediaPlayer ,this] (int position){

            mediaPlayer->setPosition(position);
        });

jsulm

@Kinesis What is this:

connect(mediaPlayer , &QMediaPlayer::setPosition, [mediaPlayer ,this] (int position){

            mediaPlayer->setPosition(position);
        });

?
QMediaPlayer::setPosition() is a slot not a signal.
I think you need to change the range

m_positionSlider->setRange(0, 0);

You can use http://doc.qt.io/qt-5/qmediaplayer.html#duration-prop to set the range.

Devopia53

@aha_1980

I know that well(as [&] or [=]). But what I have described is that you have captured the member variables of the this object directly. Take a look at his source code. here: connect(mediaPlayer, &QMediaPlayer::stateChanged, [m_playButton, this](QMediaPlayer::State state)
A m_playButton is a member of the this.

Kinesis

@jsulm
Thanks for your suggestion . Now the slider is running along with video.But to use it like skip slider how should I correct this "QMediaPlayer::setPosition() " which is a slot but not a signal ?By the way , sorry for late response .

jsulm

@Kinesis You don't need

connect(mediaPlayer , &QMediaPlayer::setPosition, [mediaPlayer ,this] (int position){

            mediaPlayer->setPosition(position);
        });

You're already using QMediaPlayer::positionChanged...

Kinesis

@jsulm
I got this. It's done now. My code is working fully 100% now . Thanks a lot for helping me . I fell bad that I wasted your time . By the way should I upload my
code ? It might help someone . Thanks.

jsulm

@Kinesis No need to feel bad - I'm helping here voluntary :-)
I don't think you need to upload your code. If somebody has questions he/she can ask.

WoodyLanes

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