When I try to launch my videowidget application it gives me the error:
(videowidget:9305): GLib-GObject-WARNING **: cannot register existing type 'GstObject'
(videowidget:9305): GLib-CRITICAL **: g_once_init_leave: assertion 'result != 0' failed
(videowidget:9305): GLib-GObject-CRITICAL **: g_type_register_static: assertion 'parent_type > 0' failed
(videowidget:9305): GLib-CRITICAL **: g_once_init_leave: assertion 'result != 0' failed
(videowidget:9305): GStreamer-CRITICAL **: gst_element_class_set_details_simple: assertion 'GST_IS_ELEMENT_CLASS (klass)' failed
(videowidget:9305): GStreamer-WARNING **: static caps 0xade3824c string is NULL
(videowidget:9305): GStreamer-CRITICAL **: gst_mini_object_unref: assertion 'mini_object != NULL' failed
(videowidget:9305): GStreamer-WARNING **: static caps 0xade3828c string is NULL
(videowidget:9305): GStreamer-CRITICAL **: gst_mini_object_unref: assertion 'mini_object != NULL' failed
(videowidget:9305): GStreamer-WARNING **: static caps 0xade3824c string is NULL
(videowidget:9305): GStreamer-CRITICAL **: gst_mini_object_unref: assertion 'mini_object != NULL' failed
I have two GStreamer versions installed on my target machine 0.10 and 1.0 which runs on Jessie 8.2.
I figured out that when I uninstall 1.0, 0.10 version requires an .so file from gstreamer1.0.
VideoWidget example from Qt example folder works fine, but the simple example from doc.qt.io/qt-5/videooverview.html won't work.
1.0 and 0.10 are parallel installable and I doubt one is trying to use a file from the other.
Those issues usually happen when the application was linked against both versions. While you can have both at your system, applications should link only against one of them.
when you construct an object ,it's parent should be Q_NULL_POINTER.
QFileDialog *pDlg = new QFileDialog();
instead of
QFileDialog *pDlg = new QFileDialog(this);
Related
I'm running GStreamer in Raspbian Buster and I get a bunch of warnings the first time I use it, after a fresh install. This is not very problematic because is only one. However, I want to create a python binary using pyinstaller and each time I run the executable, I get the same warings. Any idea what is causing all these warnings? And how can I remove then, when using gst-python?
(hello_world:14518): GStreamer-WARNING **: 00:20:12.375: Failed to load plugin '/tmp/_MEIwrkn0j/libmmal_core.so': /tmp/_MEIwrkn0j/libmmal_vc_client.so: undefined symbol: mmal_status_to_string
(hello_world:14518): GStreamer-WARNING **: 00:20:12.376: Failed to load plugin '/tmp/_MEIwrkn0j/libmmal_util.so': /tmp/_MEIwrkn0j/libmmal_util.so: undefined symbol: mmal_log_category
(hello_world:14518): GStreamer-WARNING **: 00:20:12.386: Failed to load plugin '/tmp/_MEIwrkn0j/libmmal_vc_client.so': /tmp/_MEIwrkn0j/libmmal_vc_client.so: undefined symbol: mmal_log_category
(hello_world:14518): GStreamer-WARNING **: 00:20:12.399: Failed to load plugin '/tmp/_MEIwrkn0j/gst_plugins/libgstopenal.so': /tmp/_MEIwrkn0j/gst_plugins/libgstopenal.so: undefined symbol: _gst_debug_min
(hello_world:14518): GStreamer-WARNING **: 00:20:12.401: Failed to load plugin '/tmp/_MEIwrkn0j/gst_plugins/libgstmpeg2enc.so': /tmp/_MEIwrkn0j/gst_plugins/libgstmpeg2enc.so: undefined symbol: GST_CAT_DEFAULT
(hello_world:14518): GStreamer-WARNING **: 00:20:12.404: Failed to load plugin '/tmp/_MEIwrkn0j/gst_plugins/libgstlame.so': /tmp/_MEIwrkn0j/gst_plugins/libgstlame.so: undefined symbol: _gst_debug_min
Source codes c++ gtkmm3 gtk4 linux:
#include <gtkmm.h>
#include <gtk/gtk.h>
#include <glib.h>
int main(int argc, char *argv[])
{
auto app =
Gtk::Application::create(argc, argv,
"org.gtkmm.examples.base");
Gtk::Window window;
window.set_default_size(200, 200);
return app->run(window);
}
I compiled them with next command in terminal:
g++ -o main main.cpp $(pkg-config --cflags gtkmm-3.0 --libs gtk3)
and they does not start and I see next errors in console (terminal) on xubuntu 21.10 xfce (xfce4-panel 4.16.3 (Xfce 4.16))
user#myPC:~$ ./main
(process:39732): GLib-GObject-WARNING **: 18:55:52.593: cannot register existing type 'GtkWidget'
(process:39732): GLib-GObject-WARNING **: 18:55:52.593: cannot add class private field to invalid type '<invalid>'
(process:39732): GLib-GObject-WARNING **: 18:55:52.593: cannot add private field to invalid (non-instantiatable) type '<invalid>'
(process:39732): GLib-GObject-CRITICAL **: 18:55:52.593: g_type_add_interface_static: assertion 'G_TYPE_IS_INSTANTIATABLE (instance_type)' failed
(process:39732): GLib-GObject-WARNING **: 18:55:52.593: cannot register existing type 'GtkBuildable'
(process:39732): GLib-GObject-CRITICAL **: 18:55:52.593: g_type_interface_add_prerequisite: assertion 'G_TYPE_IS_INTERFACE (interface_type)' failed
(process:39732): GLib-CRITICAL **: 18:55:52.593: g_once_init_leave: assertion 'result != 0' failed
(process:39732): GLib-GObject-CRITICAL **: 18:55:52.593: g_type_add_interface_static: assertion 'G_TYPE_IS_INSTANTIATABLE (instance_type)' failed
(process:39732): GLib-GObject-CRITICAL **: 18:55:52.593: g_type_register_static: assertion 'parent_type > 0' failed
(process:39732): GLib-GObject-WARNING **: 18:55:52.593: cannot add private field to invalid (non-instantiatable) type '<invalid>'
(process:39732): GLib-CRITICAL **: 18:55:52.593: g_once_init_leave: assertion 'result != 0' failed
(process:39732): GLib-GObject-CRITICAL **: 18:55:52.593: g_type_register_static: assertion 'parent_type > 0' failed
(process:39732): GLib-GObject-WARNING **: 18:55:52.593: cannot add private field to invalid (non-instantiatable) type '<invalid>'
Why?
I think you may need the package gtk3-engines-xfce or later to be installed.
sudo apt update
sudo apt install gtk3-engines-xfce
I don't known the reason of it. I use gtkmm on mac os and I noticed I must use "g++ -std=c++11 to compile the source, or it will failed.
for your code, I think you just include <gtkmm.h> to get the program work. gtk.h and glib.h shoule be included by gtkmm.h already.
I'm in Ubuntu 20.04 using Opencv 4.4.0 in C++. I can run the file but failure throwing the next message:
[ WARN:0] global /home/user/opencv-4.4.0/modules/videoio/src/cap_gstreamer.cpp (713) open OpenCV | GStreamer warning: Error opening bin: error de sintaxis
[ WARN:0] global /home/user/opencv-4.4.0/modules/videoio/src/cap_gstreamer.cpp (480) isPipelinePlaying OpenCV | GStreamer warning: GStreamer: pipeline have not been created
Error opening video stream or file
I don't know what's the problem
ERRORS:
error: ‘glfwSetWindowMonitor’ was not declared in this scope
recipe for target 'cocos2d/cocos/CMakeFiles/cocos2dInternal.dir/platform/desktop/CCGLViewImpl-desktop.cpp.o' failed
recipe for target 'cocos2d/cocos/CMakeFiles/cocos2dInternal.dir/all' failed
recipe for target 'all' failed
You should run ./frameworks/cocos2d-x/build/install-deps-linux.sh before building the project
It tried to run a GStreamer Tutorial Example, that already worked, but didn't work anymore right now. I didn't change the source code. I build the Project with CMake.
I get the following Error on every of my Testprograms, that are slightly different from each other:
(GStreamer_Test_AppSrc:28073): GLib-GObject-CRITICAL **: g_param_spec_boxed: assertion `G_TYPE_IS_BOXED (boxed_type)' failed
(GStreamer_Test_AppSrc:28073): GLib-GObject-CRITICAL **: g_object_class_install_property: assertion `G_IS_PARAM_SPEC (pspec)' failed
(GStreamer_Test_AppSrc:28073): GLib-GObject-WARNING **: gsignal.c:1644: parameter 1 of type `<invalid>' for signal "GstAppSrc::push_buffer" is not a value type
(GStreamer_Test_AppSrc:28073): GLib-GObject-WARNING **: cannot register existing type `GstObject'
(GStreamer_Test_AppSrc:28073): GLib-CRITICAL **: g_once_init_leave: assertion `result != 0' failed
(GStreamer_Test_AppSrc:28073): GLib-GObject-CRITICAL **: g_type_register_static: assertion `parent_type > 0' failed
(GStreamer_Test_AppSrc:28073): GLib-CRITICAL **: g_once_init_leave: assertion `result != 0' failed
(GStreamer_Test_AppSrc:28073): GStreamer-CRITICAL **: gst_element_class_set_static_metadata: assertion `GST_IS_ELEMENT_CLASS (klass)' failed
(GStreamer_Test_AppSrc:28073): GStreamer-CRITICAL **: gst_caps_ref: assertion `GST_CAPS_REFCOUNT_VALUE (caps) > 0' failed
(GStreamer_Test_AppSrc:28073): GStreamer-CRITICAL **: gst_caps_ref: assertion `GST_CAPS_REFCOUNT_VALUE (caps) > 0' failed
(GStreamer_Test_AppSrc:28073): GStreamer-CRITICAL **: gst_caps_unref: assertion `GST_CAPS_REFCOUNT_VALUE (caps) > 0' failed
The Problem was, that i had installed GStreamer 0.10.x AND 1.x and mixed together both respectively CMake.
CMake remembered some Cache Settings, when i tried to compile my Project with GStreamer 1.x. After cleaning up the Out-of-Source Build Directory of the CMake-Project and rebuilt the Project again with solely GStreamer-0.10.x Dependencies, my Programs again worked as expected.