Question

我已经用C ++构建了一个Qt应用程序，该应用程序利用OpenCV并在Raspberry Pi上运行。由于某些原因，我无法使该应用程序直接在Raspberry Pi的显示器上运行。

如果将显示发送到远程xserver，应用程序运行正常，但是如果尝试运行并在Pi上运行的xserver上显示它，则会出现以下错误：

libEGL warning: DRI2: failed to authenticate
qt5ct: using qt5ct plugin

** (LCVTrial_CppOpenCV:1914): WARNING **: Error retrieving accessibility bus address: org.freedesktop.DBus.Error.ServiceUnknown: The name org.a11y.Bus was not provided by any .service files

(LCVTrial_CppOpenCV:1914): GLib-GObject-WARNING **: cannot register existing type 'GtkWidget'

(LCVTrial_CppOpenCV:1914): GLib-GObject-CRITICAL **: g_type_add_interface_static: assertion 'G_TYPE_IS_INSTANTIATABLE (instance_type)' failed

(LCVTrial_CppOpenCV:1914): GLib-GObject-WARNING **: cannot register existing type 'GtkBuildable'

(LCVTrial_CppOpenCV:1914): GLib-GObject-CRITICAL **: g_type_interface_add_prerequisite: assertion 'G_TYPE_IS_INTERFACE (interface_type)' failed

(LCVTrial_CppOpenCV:1914): GLib-CRITICAL **: g_once_init_leave: assertion 'result != 0' failed

(LCVTrial_CppOpenCV:1914): GLib-GObject-CRITICAL **: g_type_add_interface_static: assertion 'G_TYPE_IS_INSTANTIATABLE (instance_type)' failed

(LCVTrial_CppOpenCV:1914): GLib-GObject-CRITICAL **: g_type_register_static: assertion 'parent_type > 0' failed

运行到远程显示器时不会显示任何错误。

我仅使用GUI制作了该应用程序的“精简版”版本，删除了OpenCV，它在Pi的显示器上运行良好。

对于在哪里寻找/调查的任何想法或方向将不胜感激！

Answer 1

Raspi上缺少一些库尝试在raspi终端上

sudo apt-get install at-spi2-core

在/ etc / environment中添加

QT_QPA_PLATFORMTHEME=gtk2

并且不要忘记更新gstreamer

希望有帮助

Qt OpenCV应用程序无法在Raspberry Pi显示器上运行

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