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Video Playback issues on QT 5.2, Windows 7, MinGW32

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  • J Offline
    J Offline
    JavaScriptDude
    wrote on last edited by
    #1

    On my build environment, all video playback fails with the error: DirectShowPlayerService::doRender: Unresolved error code 80040266

    This video playback fails on any video file I tried including ogv, webm, mp4.

    I also tried the W3Schools HTML5 Video tester in Tabbed Browser sample app and it fails with the same error when I try to play the video.

    I build up an Ubuntu 13.1 environment to verify it html5 video support should work I confirmed that the W3Schools HTML5 Video player works fine on Ubuntu.

    Anybody know about this issue?

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    • JKSHJ Offline
      JKSHJ Offline
      JKSH
      Moderators
      wrote on last edited by
      #2

      Hi,

      How did you try to show the videos?

      This page might provide some clues to the source of your error: http://qt-project.org/wiki/Qt_Multimedia_Backends

      Qt Doc Search for browsers: forum.qt.io/topic/35616/web-browser-extension-for-improved-doc-searches

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      • J Offline
        J Offline
        JavaScriptDude
        wrote on last edited by
        #3

        Hello JKSH

        I will look into the page you suggested.

        For your question, I tried playing the videos many different ways including:

        Custom iframe youtube based page that loaded a webm video

        YouTube view app loading the same webm video

        Called the W3Schools HTML5 Video demo from Tab Browser, Fancy Browser and a custom simple QWebView app

        Made a local copy of the W3Schools HTML5 Video HTML and tried many different ways

        I tried the Video Player sample app to load several good html5 video formats

        All of the tests resulted with the same error message.

        To extend my testing, I loaded the MSVC 2012 Tool Kit into my environment and all the videos play fine when I build using this tool kit. Therefore, this issue appears so far to be isolated to MinGW 32bit build environment.

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        • M Offline
          M Offline
          maxit
          wrote on last edited by
          #4

          Hi,

          For minGW, the only available backend is the DirectShow backend (dsengine), which will not support many codecs out-of-the-box. Installing codecs for DirectShow solved the problem in my case, except when the video does not include an audio stream.
          We are now testing with a MSVC 2012 build, which includes both the WMF and the DS backend. WMF supports more codecs (but might have trouble with h.264). I will post the test results when they 're done.

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