7e886531a2
QtMultimedia 6.6.0 would select dynamic VAAPI on linux, then warns during build (even though it chose this on purpose): > QT_FEATURE_vaapi is found but ffmpeg doesn't include vaapi, > however dynamic symbols resolve is possible The nuisance warning was fixed for 6.7 and backported to 6.6.1: https://codereview.qt-project.org/c/qt/qtmultimedia/+/517333 However, tracing it helped me figure out why vaapi actually wasn't working: nix doesn't end up with an rpath such that dlopen("va") can actually find libva.so in the nix store, thus failing at runtime: > qt.multimedia.plugin: loading backend "ffmpeg" > qt.core.library: "/nix/store/i9fkjks6dfjj1p9qvj5633sxbrf5rbd8-qtmultimedia-6.6.1/lib/qt-6/plugins/multimedia/libffmpegmediaplugin.so" loaded library > qt.multimedia.ffmpeg.libsymbolsresolver: Start VAAPI symbols resolving: 39 symbols > qt.core.library: "va" cannot load: Cannot load library va: (va: cannot open shared object file: No such file or directory) > qt.multimedia.ffmpeg.libsymbolsresolver: Couldn't load VAAPI library |
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| .. | ||
| qt3d.nix | ||
| qt5compat.nix | ||
| qtbase.nix | ||
| qtcharts.nix | ||
| qtconnectivity.nix | ||
| qtdatavis3d.nix | ||
| qtdeclarative.nix | ||
| qtdoc.nix | ||
| qtgraphs.nix | ||
| qtgrpc.nix | ||
| qthttpserver.nix | ||
| qtimageformats.nix | ||
| qtlanguageserver.nix | ||
| qtlocation.nix | ||
| qtlottie.nix | ||
| qtmqtt.nix | ||
| qtmultimedia.nix | ||
| qtnetworkauth.nix | ||
| qtpositioning.nix | ||
| qtquick3d.nix | ||
| qtquick3dphysics.nix | ||
| qtquickeffectmaker.nix | ||
| qtquicktimeline.nix | ||
| qtremoteobjects.nix | ||
| qtscxml.nix | ||
| qtsensors.nix | ||
| qtserialbus.nix | ||
| qtserialport.nix | ||
| qtshadertools.nix | ||
| qtspeech.nix | ||
| qtsvg.nix | ||
| qttools.nix | ||
| qttranslations.nix | ||
| qtvirtualkeyboard.nix | ||
| qtwayland.nix | ||
| qtwebchannel.nix | ||
| qtwebengine.nix | ||
| qtwebsockets.nix | ||
| qtwebview.nix | ||