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  1. Qt
  2. QTBUG-51064

QML Video type doesn't work with core profile



      Just came across a bug, while trying to use a 'Video' Qml type in my QML offscreen renderer. Error description was 'Failed to find shader biplanaryuvvideo_core.frag' and 'Failed to find shader biplanaryuvvideo_core.vert'.

      Turns out that rendering QML to a QSurfaceFormat::CoreProfile always appends '_core' to the shader source names, and no such shaders are present in 'qtmultimedia/src/qtmultimediaquicktools/shaders'. Check QSGShaderSourceBuilder::appendSourceFile(const QString &fileName)
      which in turn calls resolveShaderPath(fileName) that does the appending of '_core'. IMHO proper solution would be to add the *_core files to the shaders in 'qtmultimedia/src/qtmultimediaquicktools/shaders'.

      Until a fix to the issue, using QSurfaceFormat::CompatibilityProfile profile, solves the issue.


        1. qmlvideo.zip
          4 kB
        2. qmlvideo-COMP.trace
          1.05 MB
        3. qmlvideo-CORE.trace
          794 kB
        4. Schermata 2018-12-24 alle 16.41.33.png
          Schermata 2018-12-24 alle 16.41.33.png
          1.21 MB

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              • Assignee:
                lpotter Lorn Potter
                buldozer Toni Rutar Lokar
              • Votes:
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                15 Start watching this issue


                • Created:

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