diff -ruN phonon-backend-gstreamer-4.6.3-orig/cmake/FindPhonon.cmake phonon-backend-gstreamer-4.6.3/cmake/FindPhonon.cmake
--- phonon-backend-gstreamer-4.6.3-orig/cmake/FindPhonon.cmake	2013-01-31 17:42:39.000000000 -0600
+++ phonon-backend-gstreamer-4.6.3/cmake/FindPhonon.cmake	2021-10-08 16:27:01.000000000 -0500
@@ -6,7 +6,14 @@
 # Redistribution and use is allowed according to the terms of the BSD license.
 # For details see the accompanying COPYING-CMAKE-SCRIPTS file.
 
-find_package(Phonon NO_MODULE)
+set(PKG UndefinedPhononPackage)
+if(PHONON_BUILD_PHONON4QT5)
+    set(PKG Phonon4Qt5)
+else()
+    set(PKG Phonon)
+endif()
+
+find_package(${PKG} NO_MODULE)
 
 if(PHONON_BUILDSYSTEM_DIR)
     set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${PHONON_BUILDSYSTEM_DIR})
@@ -19,4 +26,4 @@
 
 include(FindPackageHandleStandardArgs)
 
-find_package_handle_standard_args(Phonon  DEFAULT_MSG  Phonon_DIR )
+find_package_handle_standard_args(${PKG}  DEFAULT_MSG  ${PKG}_DIR )
diff -ruN phonon-backend-gstreamer-4.6.3-orig/gstreamer/CMakeLists.txt phonon-backend-gstreamer-4.6.3/gstreamer/CMakeLists.txt
--- phonon-backend-gstreamer-4.6.3-orig/gstreamer/CMakeLists.txt	2013-01-31 17:42:39.000000000 -0600
+++ phonon-backend-gstreamer-4.6.3/gstreamer/CMakeLists.txt	2021-10-08 16:50:40.000000000 -0500
@@ -67,11 +67,11 @@
         list(APPEND phonon_gstreamer_SRCS glrenderer.cpp)
    endif(OPENGL_FOUND)
 
-   if(NOT WIN32)
+   if(NOT APPLE)
       set(phonon_gstreamer_SRCS
           ${phonon_gstreamer_SRCS}
           x11renderer.cpp)
-   endif(NOT WIN32)
+   endif(NOT APPLE)
 
    automoc4_add_library(phonon_gstreamer MODULE ${phonon_gstreamer_SRCS})
    set_target_properties(phonon_gstreamer PROPERTIES PREFIX "")
diff -ruN phonon-backend-gstreamer-4.6.3-orig/gstreamer/backend.cpp phonon-backend-gstreamer-4.6.3/gstreamer/backend.cpp
--- phonon-backend-gstreamer-4.6.3-orig/gstreamer/backend.cpp	2013-01-31 17:42:39.000000000 -0600
+++ phonon-backend-gstreamer-4.6.3/gstreamer/backend.cpp	2021-10-08 16:30:14.000000000 -0500
@@ -41,7 +41,7 @@
 
 QT_BEGIN_NAMESPACE
 
-Q_EXPORT_PLUGIN2(phonon_gstreamer, Phonon::Gstreamer::Backend)
+//Q_EXPORT_PLUGIN2(phonon_gstreamer, Phonon::Gstreamer::Backend);
 
 namespace Phonon
 {
diff -ruN phonon-backend-gstreamer-4.6.3-orig/gstreamer/debug.cpp phonon-backend-gstreamer-4.6.3/gstreamer/debug.cpp
--- phonon-backend-gstreamer-4.6.3-orig/gstreamer/debug.cpp	2013-01-31 17:42:39.000000000 -0600
+++ phonon-backend-gstreamer-4.6.3/gstreamer/debug.cpp	2021-10-08 16:36:47.000000000 -0500
@@ -23,7 +23,7 @@
 
 #include <QtCore/QMutex>
 #include <QtCore/QObject>
-#include <QtGui/QApplication>
+#include <QtWidgets/QApplication>
 
 #ifdef Q_OS_UNIX
 # include <unistd.h>
diff -ruN phonon-backend-gstreamer-4.6.3-orig/gstreamer/devicemanager.cpp phonon-backend-gstreamer-4.6.3/gstreamer/devicemanager.cpp
--- phonon-backend-gstreamer-4.6.3-orig/gstreamer/devicemanager.cpp	2013-01-31 17:42:39.000000000 -0600
+++ phonon-backend-gstreamer-4.6.3/gstreamer/devicemanager.cpp	2021-10-08 16:49:06.000000000 -0500
@@ -292,7 +292,7 @@
     if (m_videoSinkWidget == "software") {
         return new WidgetRenderer(parent);
     }
-#ifndef Q_WS_QWS
+#if !defined(Q_WS_QWS) && !defined(Q_OS_MAC)
     else if (m_videoSinkWidget == "xwindow") {
         return new X11Renderer(parent);
     } else {
diff -ruN phonon-backend-gstreamer-4.6.3-orig/gstreamer/mediaobject.cpp phonon-backend-gstreamer-4.6.3/gstreamer/mediaobject.cpp
--- phonon-backend-gstreamer-4.6.3-orig/gstreamer/mediaobject.cpp	2013-01-31 17:42:39.000000000 -0600
+++ phonon-backend-gstreamer-4.6.3/gstreamer/mediaobject.cpp	2021-10-08 16:37:13.000000000 -0500
@@ -36,7 +36,7 @@
 #include <QtCore/QStringList>
 #include <QtCore/QTimer>
 #include <QtCore/QVector>
-#include <QtGui/QApplication>
+#include <QtWidgets/QApplication>
 #include <QtGui/QFont>
 #include <phonon/GlobalDescriptionContainer>
 
diff -ruN phonon-backend-gstreamer-4.6.3-orig/gstreamer/mediaobject.h phonon-backend-gstreamer-4.6.3/gstreamer/mediaobject.h
--- phonon-backend-gstreamer-4.6.3-orig/gstreamer/mediaobject.h	2013-01-31 17:42:39.000000000 -0600
+++ phonon-backend-gstreamer-4.6.3/gstreamer/mediaobject.h	2021-10-08 16:28:08.000000000 -0500
@@ -21,10 +21,10 @@
 
 #include "medianode.h"
 #include "pipeline.h"
-#include <phonon/mediaobjectinterface.h>
-#include <phonon/addoninterface.h>
-#include <phonon/objectdescription.h>
-#include <phonon/MediaController>
+#include <Phonon/mediaobjectinterface.h>
+#include <Phonon/addoninterface.h>
+#include <Phonon/objectdescription.h>
+#include <Phonon/MediaController>
 
 #include <QtCore/QObject>
 #include <QtCore/QString>
diff -ruN phonon-backend-gstreamer-4.6.3-orig/gstreamer/pipeline.h phonon-backend-gstreamer-4.6.3/gstreamer/pipeline.h
--- phonon-backend-gstreamer-4.6.3-orig/gstreamer/pipeline.h	2013-01-31 17:42:39.000000000 -0600
+++ phonon-backend-gstreamer-4.6.3/gstreamer/pipeline.h	2021-10-08 16:28:14.000000000 -0500
@@ -20,8 +20,8 @@
 
 #include "plugininstaller.h"
 #include <gst/gst.h>
-#include <phonon/MediaSource>
-#include <phonon/MediaController>
+#include <Phonon/MediaSource>
+#include <Phonon/MediaController>
 #include <QtCore/QMutex>
 
 QT_BEGIN_NAMESPACE
diff -ruN phonon-backend-gstreamer-4.6.3-orig/gstreamer/plugininstaller.cpp phonon-backend-gstreamer-4.6.3/gstreamer/plugininstaller.cpp
--- phonon-backend-gstreamer-4.6.3-orig/gstreamer/plugininstaller.cpp	2013-01-31 17:42:39.000000000 -0600
+++ phonon-backend-gstreamer-4.6.3/gstreamer/plugininstaller.cpp	2021-10-08 16:38:12.000000000 -0500
@@ -18,8 +18,8 @@
 #include "plugininstaller.h"
 #include <gst/gst.h>
 #include <QtCore/QCoreApplication>
-#include <QtGui/QApplication>
-#include <QtGui/QWidget>
+#include <QtWidgets/QApplication>
+#include <QtWidgets/QWidget>
 #include <QtCore/QLibrary>
 #include <QtCore/QPointer>
 #include <QtCore/QMetaType>
diff -ruN phonon-backend-gstreamer-4.6.3-orig/gstreamer/qwidgetvideosink.cpp phonon-backend-gstreamer-4.6.3/gstreamer/qwidgetvideosink.cpp
--- phonon-backend-gstreamer-4.6.3-orig/gstreamer/qwidgetvideosink.cpp	2013-01-31 17:42:39.000000000 -0600
+++ phonon-backend-gstreamer-4.6.3/gstreamer/qwidgetvideosink.cpp	2021-10-08 16:38:31.000000000 -0500
@@ -15,7 +15,7 @@
     along with this library.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#include <QtGui/QApplication>
+#include <QtWidgets/QApplication>
 
 #include <gst/video/video.h>
 
diff -ruN phonon-backend-gstreamer-4.6.3-orig/gstreamer/streamreader.cpp phonon-backend-gstreamer-4.6.3/gstreamer/streamreader.cpp
--- phonon-backend-gstreamer-4.6.3-orig/gstreamer/streamreader.cpp	2013-01-31 17:42:39.000000000 -0600
+++ phonon-backend-gstreamer-4.6.3/gstreamer/streamreader.cpp	2021-10-08 16:43:10.000000000 -0500
@@ -16,6 +16,9 @@
     along with this library.  If not, see <http://www.gnu.org/licenses/>.
 */
 
+#include <QtCore/qglobal.h>
+void *qMemCopy(void *dest, const void *src, size_t n);
+
 #include "streamreader.h"
 
 #include "debug.h"
diff -ruN phonon-backend-gstreamer-4.6.3-orig/gstreamer/videowidget.cpp phonon-backend-gstreamer-4.6.3/gstreamer/videowidget.cpp
--- phonon-backend-gstreamer-4.6.3-orig/gstreamer/videowidget.cpp	2013-01-31 17:42:39.000000000 -0600
+++ phonon-backend-gstreamer-4.6.3/gstreamer/videowidget.cpp	2021-10-08 16:46:05.000000000 -0500
@@ -22,7 +22,7 @@
 #include <QtGui/QPalette>
 #include <QtGui/QImage>
 #include <QtGui/QPainter>
-#include <QtGui/QBoxLayout>
+#include <QtWidgets/QBoxLayout>
 #include <QApplication>
 #include <gst/gst.h>
 #include <gst/interfaces/navigation.h>
@@ -429,7 +429,7 @@
         if (navigation) {
             // TODO key code via xlib?
             gst_navigation_send_key_event(navigation, "key-pressed",
-                                          event->text().toAscii());
+                                          event->text().toLatin1());
         }
     }
     QWidget::keyPressEvent(event);
@@ -443,7 +443,7 @@
         if (navigation) {
             // TODO key code via xlib?
             gst_navigation_send_key_event(navigation, "key-released",
-                                          event->text().toAscii());
+                                          event->text().toLatin1());
         }
     }
     QWidget::keyReleaseEvent(event);
diff -ruN phonon-backend-gstreamer-4.6.3-orig/gstreamer/x11renderer.cpp phonon-backend-gstreamer-4.6.3/gstreamer/x11renderer.cpp
--- phonon-backend-gstreamer-4.6.3-orig/gstreamer/x11renderer.cpp	2013-01-31 17:42:39.000000000 -0600
+++ phonon-backend-gstreamer-4.6.3/gstreamer/x11renderer.cpp	2021-10-08 16:46:28.000000000 -0500
@@ -23,7 +23,7 @@
 #include "backend.h"
 #include "mediaobject.h"
 #include <QtGui/QPalette>
-#include <QtGui/QApplication>
+#include <QtWidgets/QApplication>
 #include <QtGui/QPainter>
 #include <X11/Xlib.h>
 #include <gst/gst.h>