QML video element could not read from resource

[bluestreak]

I am trying to stream two different videos into my QML application. The first, is NTSC, and I get through /dev/video1 and I can see it being successfully displayed in VLC.
@
Video {
id: camera1
autoLoad: true
playing: true
source: "/dev/video1"
onStarted: {
camera1.play()
}
}
@
When I try to make a video element with it, I get the error "Could not read from resource."

The other is an RTSP stream, which occasionally outputs video, but often crashes the application.
@
Video {
id: cameraChoice
autoLoad: true
playing: true
source: "rtsp://172.31.0.200/stream1"
onStarted: {
cameraChoice.play()
}
}
@
Sometimes it works, and outputs the video it is given. Other times, it will crash and report "The program has unexpectedly finished." This happens both after a mere half second of the program running, and after successfully starting and then switching to a view that contains the video if the application has been running for less than 5 seconds.

In addition, even if you do wait and get to it with video displaying, when you switch to a new view, the video remains there for over a second while the tab content behind it changes, before it finally disappears.

Searching around, I could find no information on why the NTSC connection through video could not be read. In the case of the RTSP stream, I found a report of a bug with RTSP crashing https://bugreports.qt-project.org/browse/QTBUG-21501

I tried to follow the suggestions of the bug report as below, changing graphics and using a QGL widget, however neither worked.
@
int main(int argc, char *argv[])
{

QApplication a(argc, argv);

// Use a raster graphics system
QApplication::setGraphicsSystem("raster"); // You can also try "opengl" here

MainWindow w;
w.setViewportUpdateMode(QGraphicsView::FullViewportUpdate);
w.setViewport(new QGLWidget);

w.setSource(QUrl::fromLocalFile(contentPath + "/main.qml"));
w.show();
return a.exec();

}
@

Does anyone know whether these two problems are both tied to the video widget, and how to fix them so that I can get video to be read and displayed consistenly?

[aabc]

Don't you need to add port to the rtsp source ?