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  1. Qt
  2. QTBUG-51064

QML Video type doesn't work with core profile

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    • Commits:
      abab792c4f0977a4599e5b7b2e97a5ee586fe388 (qt/qtmultimedia/dev) 1c9da622dc7e8ac6fa42f5263a5410098073b662 (qt/tqtc-qtmultimedia/tqtc/lts-5.15)

      Description

      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.

        Attachments

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

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              Assignee:
              lpotter Lorn Potter
              Reporter:
              buldozer Toni Rutar Lokar
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              16 Start watching this issue

                Dates

                Created:
                Updated:
                Resolved:

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