Example switching between two video sources (but very slow)

[python-gstreamer-examples] / example4.glade

diff --git a/example4.glade b/example4.glade
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+<?xml version="1.0" encoding="UTF-8"?>
+<!-- Generated with glade 3.20.0 -->
+<interface>
+  <requires lib="gtk+" version="3.10"/>
+  <object class="GtkImage" id="image1">
+    <property name="visible">True</property>
+    <property name="can_focus">False</property>
+    <property name="stock">gtk-orientation-landscape</property>
+    <property name="icon_size">3</property>
+  </object>
+  <object class="GtkImage" id="image2">
+    <property name="visible">True</property>
+    <property name="can_focus">False</property>
+    <property name="stock">gtk-orientation-reverse-landscape</property>
+    <property name="icon_size">3</property>
+  </object>
+  <object class="GtkWindow" id="mainwindow">
+    <property name="can_focus">False</property>
+    <property name="title" translatable="yes">GStreamer video test</property>
+    <property name="icon_name">video-display</property>
+    <child>
+      <object class="GtkVBox" id="box1">
+        <property name="visible">True</property>
+        <property name="can_focus">False</property>
+        <child>
+          <object class="GtkAlignment" id="alignment2">
+            <property name="visible">True</property>
+            <property name="can_focus">False</property>
+            <property name="margin_left">8</property>
+            <property name="margin_right">8</property>
+            <property name="margin_top">8</property>
+            <child>
+              <object class="GtkDrawingArea" id="viewport">
+                <property name="name">viewport</property>
+                <property name="width_request">1280</property>
+                <property name="height_request">720</property>
+                <property name="visible">True</property>
+                <property name="app_paintable">True</property>
+                <property name="can_focus">False</property>
+                <property name="hexpand">True</property>
+                <property name="vexpand">True</property>
+              </object>
+            </child>
+          </object>
+          <packing>
+            <property name="expand">False</property>
+            <property name="fill">True</property>
+            <property name="position">0</property>
+          </packing>
+        </child>
+        <child>
+          <object class="GtkAlignment" id="alignment1">
+            <property name="visible">True</property>
+            <property name="can_focus">False</property>
+            <property name="margin_left">8</property>
+            <property name="margin_right">8</property>
+            <property name="margin_top">8</property>
+            <property name="margin_bottom">8</property>
+            <property name="yalign">1</property>
+            <child>
+              <object class="GtkHButtonBox" id="buttonbox1">
+                <property name="visible">True</property>
+                <property name="can_focus">False</property>
+                <property name="spacing">8</property>
+                <property name="homogeneous">True</property>
+                <property name="baseline_position">bottom</property>
+                <property name="layout_style">center</property>
+                <child>
+                  <object class="GtkButton" id="input1">
+                    <property name="label">Input 1</property>
+                    <property name="visible">True</property>
+                    <property name="can_focus">True</property>
+                    <property name="receives_default">True</property>
+                    <property name="image">image1</property>
+                    <property name="always_show_image">True</property>
+                    <signal name="clicked" handler="on_input1_clicked" swapped="no"/>
+                  </object>
+                  <packing>
+                    <property name="expand">False</property>
+                    <property name="fill">True</property>
+                    <property name="position">0</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkButton" id="input2">
+                    <property name="label">Input 2</property>
+                    <property name="visible">True</property>
+                    <property name="can_focus">True</property>
+                    <property name="receives_default">True</property>
+                    <property name="image">image2</property>
+                    <property name="always_show_image">True</property>
+                    <signal name="clicked" handler="on_input2_clicked" swapped="no"/>
+                  </object>
+                  <packing>
+                    <property name="expand">False</property>
+                    <property name="fill">True</property>
+                    <property name="position">1</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkButton" id="quit">
+                    <property name="label">gtk-quit</property>
+                    <property name="visible">True</property>
+                    <property name="can_focus">True</property>
+                    <property name="receives_default">True</property>
+                    <property name="use_stock">True</property>
+                    <property name="always_show_image">True</property>
+                    <signal name="clicked" handler="on_quit_clicked" swapped="no"/>
+                  </object>
+                  <packing>
+                    <property name="expand">False</property>
+                    <property name="fill">True</property>
+                    <property name="position">2</property>
+                  </packing>
+                </child>
+              </object>
+            </child>
+          </object>
+          <packing>
+            <property name="expand">False</property>
+            <property name="fill">True</property>
+            <property name="position">1</property>
+          </packing>
+        </child>
+      </object>
+    </child>
+  </object>
+</interface>