ui->graphicsView Error: "Internal data stream error."

hndery

i use graphicsView to get video stream that codes work fine!! but if i use tab widget or stacked widget when i click another tab i take Error: "Internal data stream error." and stream closed.

if i used qvideowidget i never take an error everything works fine!!! but i dont want to use videowidget!!

i hope u will understand my english

whats the problem for graphicView??

        QMediaPlayer *player1 = new QMediaPlayer;
        QGraphicsVideoItem *item = new QGraphicsVideoItem;
        QGraphicsScene *scene = new QGraphicsScene(this);
     
        QSizeF size(280,160);
        item->setSize(size);
     
        ui->graphicsView->setScene(scene);
     
        scene->addItem(item);
     
        const QUrl url1 =QUrl("http://xxx.xx.x.xx:80/mjpg/video.mjpg");
        const QNetworkRequest requsetRstp1(url1);
     
        player1->setMedia(requsetRstp1);
        player1->setVideoOutput(item);
        player1->play();

AND THIS IS THE WORKING CODE WITH NO PROBLEM BUT I DONT WANT TO USE

        QVideoWidget *vw1 = new QVideoWidget;
        QMediaPlayer *player1 = new QMediaPlayer;
     
     
        ui->gridLayout->addWidget(vw1,0,0);
        player1->setVideoOutput(vw1);
     
        const QUrl url1 =QUrl("http://XX.XXX.XX.XX:8084/mjpg/video.mjpg");
        const QNetworkRequest requsetRstp1(url1);
        player1->setMedia(requsetRstp1);
        player1->play();

thanks.

SGaist

Hi and welcome to devnet,

What version of Qt are you using ?
On what platform ?

hndery

@SGaist said in ui->graphicsView Error: "Internal data stream error.":

What version of Qt

5.13.1
kubuntu 19.10

mrjj

Hi
You get the error when you put the graphicsView into a stacked or tabbed and switch "page" ?
Is that correctly understood ?

hndery

graphicsView working fine but when i click another page i take the error.
if i use videowidget i dont take an error when i swiching pages .But i want to use graphicsview not videowidget

hndery

its a simple i do it for explane...

first video is videowidget and the second video is graphicsview okay.. when i swich another page and turn back ...

second one graphicview stoped but video widget still running..
and the code simple u can copy paste url will work for u too...

//player 1 videowidget
    QVideoWidget *vw1 = new QVideoWidget;
    QMediaPlayer *player1 = new QMediaPlayer;
    ui->gridLayout->addWidget(vw1,0,0);
    player1->setVideoOutput(vw1);
    const QUrl url1 =QUrl("http://131.95.3.162:80/mjpg/video.mjpg");
    const QNetworkRequest requsetRstp1(url1);
    player1->setMedia(requsetRstp1);
    player1->play();
//player 2 graphicview
    QMediaPlayer *player2 = new QMediaPlayer;
    QGraphicsVideoItem *item = new QGraphicsVideoItem;
    QGraphicsScene *scene = new QGraphicsScene(this);


    ui->graphicsView->setScene(scene);
    scene->addItem(item);

    const QUrl url2 =QUrl("http://131.95.3.162:80/mjpg/video.mjpg");
    const QNetworkRequest requsetRstp2(url2);

    player2->setMedia(requsetRstp2);
    player2->setVideoOutput(item);
    player2->play();

mrjj

Hi
Good with the test code. And the video worked! :)
Took some seconds then it showed.
However, i could not get any errors on Windows 10 using stackedwidget.
So i think it gstreamer / linux related.

Also from the error PaintEngive: should no longer be called it really seems like something goes bad internally.

hndery

thanks alot :)