Hello,

Consider the following main.qml code, which works perfectly:

Qt Code: 
  1. import QtQuick 2.4
  2. import QtQuick.Controls 1.3
  3. import QtQuick.Window 2.2
  4. import QtMultimedia 5.0
  5.  
  6. ApplicationWindow {
  7.     title: qsTr("Hello Video")
  8.     width: 640
  9.     height: 480
  10.     visible: true
  11.  
  12.     Video {
  13.         id: video
  14.  
  15.         source: "file:///path/to/cuteLionVideo.mp4"
  16.         anchors.fill: parent
  17.     }
  18.  
  19.     MouseArea {
  20.         id: playArea
  21.  
  22.         anchors.fill: parent
  23.  
  24.         onPressed: {
  25.             console.debug("Found video with duration: " + video.duration)
  26.             video.play();
  27.         }
  28.     }
  29. }
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The duration prints correctly, and all is well. Now consider the following, in which the source is not bound, but assigned on the fly:

Qt Code: 
  1. ApplicationWindow {
  2.     Video {
  3.         id: video
  4.  
  5.         anchors.fill: parent
  6.     }
  7.  
  8.     MouseArea {
  9.         id: playArea
  10.  
  11.         anchors.fill: parent
  12.  
  13.         onPressed: {
  14.             video.source = "file:///path/to/cuteLionVideo.mp4"
  15.             console.debug("Found video with duration: " + video.duration)
  16.             video.play();
  17.         }
  18.     }
  19. }
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The duration prints 0. The documentation for the duration property states that:

If the media doesn't have a fixed duration (a live stream for example) this will be 0.
So it would seem that the video file in the above code is considered not to have a fixed duration. But in the first snippet, where the source was bound, it was correctly considered to have a fixed duration. Something must have happened under the hood in that case. My question is whether it is possible to emulate that "something" so that assigning a file URL to source at run-time leads to the desired duration behavior?

Thank you.