I'm new to QT and QML, I found a cool KDE Plasma addon on the internet and wanted to edit it, but flushMode property, which I want to use, was introduced in QT 5.13. I have installed QT 5.15 (to be exact, 5.15.3), rebooted and got file:///filename.qml:58:2: "VideoOutput.flushMode" is not available in QtMultimedia 5.8.
I also checked that qt5-multimedia is 5.15.3+kde+r0-1
(latest from arch linux repository), checked the QT version in system settings, everything says it's 5.15, but in the logs it acts like it's 5.8. Is it possible that I have 2 different qt5 installations, or why does this happen?
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Arisban
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Yes, you very likely have two Qt installed. You got system Qt package that comes with desktop environment, I believe it does not include development files (headers), to obtain them you installed qt-something-dev
package that installed another Qt as dependency.

mugiseyebrows
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