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  1. Qt
  2. QTBUG-53019

[QML Video Player] Hard perfomance regressions on Windows


    • Type: Bug
    • Status: Reported
    • Priority: P2: Important
    • Resolution: Unresolved
    • Affects Version/s: 5.6.0
    • Fix Version/s: None
    • Component/s: Multimedia
    • Labels:
    • Environment:
      * Qt 5.6.0 x86 MSVC2013 (official)
      * Windows 10 x86
      * K-Lite Codec Pack (LAV decoders is active)
      * GPU: ATI Radeon 3000 Graphics
      * CPU: AMD Athlon II X3 455 Processor
      * Open GL: v 3.3


      Currently I faced with a big problem with the video playback performance. When I try to open mp4 video file from any of QML video examples, I got a high CPU loading (~40%) and the video is freesing and jerks (in not dependence on the window sizes). Though, using a C++ examples I got satisfactory performance (with the ~7% CPU loading).

      I have installed the K-Lite Codec Pack, where are automatically are used the LAV decoders to playback (in both cases as for C++ and as for QML).


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              • Assignee:
                valentyn.doroshchuk Valentyn Doroshchuk
                kuzulis Denis Shienkov
              • Votes:
                19 Vote for this issue
                18 Start watching this issue


                • Created:

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