Graphics view

[Rockerz]

I have doubt ie. How to play video file on graphics view , Added all video files in single folder and give it name as Sample videos . I used list widget to display all video files with extension in this code . It displays all video files and when video item clicked video is played , code is crashed what is the reason for that?

#include "mainwindow.h"
#include "ui_mainwindow.h"

QString folderpath;
QStringList videoPaths;
QMediaPlayer *player;

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    ui->stackedWidget->setCurrentIndex(0);
    player = new QMediaPlayer;
 folderpath="C:/Users/admin/Desktop/Sample videos";
    QDir shortcutsFolder1(folderpath);
    QFileInfoList shortcuts(shortcutsFolder1.entryInfoList(QDir::Files, QDir::Name | QDir::IgnoreCase));
    foreach (QFileInfo fi, shortcuts)
    {
        QString videoPath = folderpath + "/" + fi.fileName();
        QString ext = fi.suffix().toLower();
        if (ext == "mp4" || ext == "avi" || ext == "mkv" ||ext == "wmv" || ext == "webm")
        {
            videoPaths.append(videoPath);
            QListWidgetItem *item = new QListWidgetItem(fi.fileName());
            item->setIcon(QIcon(QPixmap("‪H:/Qt_5.15.2/Demo/video-icon-6.png").scaled(150, 125, Qt::IgnoreAspectRatio, Qt::SmoothTransformation)));
            ui->listWidget->addItem(item);
        }
    }
    ui->listWidget->setSelectionMode(QAbstractItemView::ExtendedSelection);

}
void MainWindow::on_listWidget_itemClicked(QListWidgetItem *clickedItem)
{
    int index = ui->listWidget->row(clickedItem);

    QString videoPath = videoPaths[index];

    if (player)
    {
        player->stop();
        delete player;
    }

    player = new QMediaPlayer;
    QGraphicsVideoItem *videoItem = new QGraphicsVideoItem;

    QGraphicsScene *scene = new QGraphicsScene(this);
    scene->addItem(videoItem);

    ui->graphicsView->setScene(scene);
    ui->graphicsView->setRenderHint(QPainter::Antialiasing, true);

    player->setVideoOutput(videoItem);

    QPixmap pixmap("H:/Qt_5.15.2/Demo/video-icon-6.png");
    if (!pixmap.isNull())
    {
        QPixmap scaledPixmap = pixmap.scaled(150, 125, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
        clickedItem->setIcon(QIcon(scaledPixmap));  
    }
    else
    {
        qDebug() << "Error loading QPixmap";
    }

    player->setMedia(QUrl::fromLocalFile(videoPath));

    connect(player, &QMediaPlayer::stateChanged, this, &MainWindow::on_Playpause_pushButton_clicked);

    player->play();
}

[Christian Ehrlicher]

As always - when your program is crashing use the debugger to see where and why it is crashing.

[wrosecrans]

@Rockerz As Christian said, it's always a good idea to do basic debugging before you ask other people to take a look. You'll generally get much more useful feedback when you say things like where it's crashing and what sort of crash it is.

That said, the QPixmap constructor that takes a const char* doesn't take a filename: https://doc.qt.io/qt-6/qpixmap.html#QPixmap-4 I dunno if that's your issue. But it certainly is one of your issues.