QVideoWidget gst-pipeline

giu83

Hi to everybody,
I'm new user and I'm approched to Qt on embedded system based on iMX8.
I'm try to play a fullHD video with Qt and I have some problems.
If the video play from shell the video is displayed correctly:

gst-launch-1.0 multifilesrc location=textmp4.mp4 loop=true ! decodebin ! autovideosink

If the video play from Qt with QUrl :: fromLocalFile the video is displayed slowly with poor performance. I think this is normal. If the video play from Qt with gst-pipeline the screen is played correctly. Follows the code:

*void MainWindow::on_video_clicked()
{
videoWidget = new QVideoWidget;
player = new QMediaPlayer;

player->setVideoOutput(videoWidget);
//player->setMedia(QUrl("gst-pipeline: multifilesrc location=textmp4.mp4 ! decodebin ! waylandsink name=\"qtvideosink\""));
player->setMedia(QUrl::fromLocalFile("/home/root/textmp4.mp4"));

connect( player, SIGNAL(mediaStatusChanged(QMediaPlayer::MediaStatus)), this, SLOT(video_ended()));

player->play();
videoWidget->showFullScreen();

}*

So when the video is stopped and the widget is closed or hidden, the video remain displayed on the screen. Why is it not hooked to the widget.

Thanks.
Best regards

SGaist

Hi and welcome to devnet,

What if you use:

gst-pipeline: multifilesrc location=textmp4.mp4 ! decodebin ! qtvideosink

?

giu83

no video shown.

In log this warning:
Warning: "Delayed linking failed."

If I use
gst-pipeline: multifilesrc location=textmp4.mp4 ! decodebin name="qtvideosink"
or
gst-pipeline: multifilesrc location=textmp4.mp4 ! decodebin ! autovideosink name="qtvideosink"

In log this warning:
qt.qpa.wayland: Wayland does not support QWindow::requestActivate()

SGaist

Which version of Qt are you using ?

giu83

Qt Creator 4.5.2
Qt 5.15.0

SGaist

That looks like the information by the Qt Creator about box. Do you really use 5.15.0 ? If so, can you test a more recent version like 5.15.2 ?

giu83

On about popup there is: Based on Qt 5.9.5 (GCC 7.3.0, 64 bit)
but on tools->options->build&run->kits->qt version select I selected qt 5.15.0.
I can select only 5.15.0 or 5.9.5