Media player not working for multiple videos
-
@jsulm
Here is the codeMainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) { ui->setupUi(this); ui->listWidget->setFlow(QListView::LeftToRight); ui->listWidget->setMinimumSize(1200,350); ui->listWidget->setGridSize(QSize(360, 360)); ui->listWidget->setResizeMode(QListView::Adjust); ui->listWidget->setViewMode(QListView::ListMode); ui->listWidget->setWrapping(true); QDir directory = QFileDialog::getExistingDirectory(this, tr("Open Directory"),"/home", QFileDialog::ShowDirsOnly| QFileDialog::DontResolveSymlinks); directory.setNameFilters({"*.mp4" , "*.avi" , "*.flv" , "*.mwv"}); for(const QFileInfo & finfo: directory.entryInfoList()){ QMediaPlayer *mediaPlayer = new QMediaPlayer(); mediaPlayer->setMedia(QUrl::fromLocalFile(finfo.absoluteFilePath())); // mediaPlayer->setMedia(playlist); videoItem = new QGraphicsVideoItem; videoItem->setSize(QSize(320,240)); QGraphicsScene *scene = new QGraphicsScene(this); QGraphicsView *graphicsView = new QGraphicsView(scene); mediaPlayer->setVideoOutput(videoItem); player.append(mediaPlayer); scene->addItem(videoItem); connect(mediaPlayer, &QMediaPlayer::stateChanged, this, &MainWindow::mediaStateChanged); connect(mediaPlayer, &QMediaPlayer::positionChanged, this, &MainWindow::positionChanged); connect(mediaPlayer, &QMediaPlayer::durationChanged, this, &MainWindow::durationChanged); m_playButton = new QPushButton; m_playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPlay)); connect(m_playButton, &QAbstractButton::clicked, [mediaPlayer]() { switch (mediaPlayer->state()) { case QMediaPlayer::PlayingState: mediaPlayer->pause(); break; default: mediaPlayer->play(); break; } }); connect(mediaPlayer, &QMediaPlayer::stateChanged, [m_playButton, this](QMediaPlayer::State state) { switch(state) { case QMediaPlayer::PlayingState: m_playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPause)); break; default: m_playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPlay)); break; } }); //connect(m_playButton, &QAbstractButton::clicked, this, &MainWindow::play); //connect(m_positionSlider, &QAbstractSlider::sliderMoved,this, &MainWindow::setPosition); m_positionSlider = new QSlider(Qt::Horizontal); m_positionSlider->setRange(0, 0); auto item = new QListWidgetItem("", ui->listWidget); auto widget = new QWidget; auto label = new QLabel(finfo.fileName()); auto vb = new QVBoxLayout; QBoxLayout *controlLayout = new QHBoxLayout; controlLayout->setMargin(0); controlLayout->addWidget(m_playButton); controlLayout->addWidget(m_positionSlider); vb->addWidget(label,1); vb->addWidget(graphicsView,9); vb->addLayout(controlLayout); widget->setLayout(vb); widget->setMinimumSize(340, 340); ui->listWidget->setItemWidget(item,widget); } } MainWindow::~MainWindow() { delete ui; } QSize MainWindow::sizeHint() const { return (videoItem->size() * qreal(3) / qreal(2)).toSize(); } void MainWindow::positionChanged(qint64 position) { m_positionSlider->setValue(position); } void MainWindow::durationChanged(qint64 duration) { m_positionSlider->setRange(0, duration); } void MainWindow::setPosition(int position) { QMediaPlayer *mediaPlayer = player[1]; mediaPlayer->setPosition(position); } -
Declare
QPushButtonas a local variable like amediaPlayer. A lambda function can not capture member variables ofthis.@Devopia53 No, it can:
auto l = [this]() { // use members of this here } -
wrote on 3 Jul 2018, 08:49 last edited by Kinesis 7 Mar 2018, 09:01
@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 -
wrote on 3 Jul 2018, 09:21 last edited by Kinesis 7 Apr 2018, 04:06
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 codeQSlider *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); }); -
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 codeQSlider *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); });Lifetime Qt Championwrote on 3 Jul 2018, 10:27 last edited by jsulm 7 Mar 2018, 10:30@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 rangem_positionSlider->setRange(0, 0);You can use http://doc.qt.io/qt-5/qmediaplayer.html#duration-prop to set the range.
-
@Devopia53 No, it can:
auto l = [this]() { // use members of this here }wrote on 3 Jul 2018, 11:24 last edited by Devopia53 7 Mar 2018, 11:25I know that well(as
[&]or[=]). But what I have described is that you have captured the member variables of thethisobject directly. Take a look at his source code. here:connect(mediaPlayer, &QMediaPlayer::stateChanged, [m_playButton, this](QMediaPlayer::State state)
Am_playButtonis a member of thethis. -
@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 rangem_positionSlider->setRange(0, 0);You can use http://doc.qt.io/qt-5/qmediaplayer.html#duration-prop to set the range.
wrote on 4 Jul 2018, 04:18 last edited by@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
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 .@Kinesis You don't need
connect(mediaPlayer , &QMediaPlayer::setPosition, [mediaPlayer ,this] (int position){ mediaPlayer->setPosition(position); });You're already using QMediaPlayer::positionChanged...
-
@Kinesis You don't need
connect(mediaPlayer , &QMediaPlayer::setPosition, [mediaPlayer ,this] (int position){ mediaPlayer->setPosition(position); });You're already using QMediaPlayer::positionChanged...
-
@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.@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. -
This post is deleted!
