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diff --git a/demos/video/qmlvideofx/shaders/sobeledgedetection2.fsh b/demos/video/qmlvideofx/shaders/sobeledgedetection2.fsh
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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Mobility Components.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** This file may be used under the terms of the GNU Lesser General Public
+** License version 2.1 as published by the Free Software Foundation and
+** appearing in the file LICENSE.LGPL included in the packaging of this
+** file. Please review the following information to ensure the GNU Lesser
+** General Public License version 2.1 requirements will be met:
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 as published by the Free Software Foundation
+** and appearing in the file LICENSE.GPL included in the packaging of this
+** file. Please review the following information to ensure the GNU General
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+// Based on http://rastergrid.com/blog/downloads/frei-chen-edge-detector/
+
+#version 130
+uniform sampler2D source;
+uniform float dividerValue;
+uniform float weight;
+mat3 G[2] = mat3[](
+    mat3( 1.0, 2.0, 1.0, 0.0, 0.0, 0.0, -1.0, -2.0, -1.0 ),
+    mat3( 1.0, 0.0, -1.0, 2.0, 0.0, -2.0, 1.0, 0.0, -1.0 )
+);
+uniform lowp float qt_Opacity;
+in vec2 qt_TexCoord0;
+out vec4 FragmentColor;
+void main() {
+    vec2 uv = qt_TexCoord0.xy;
+    vec4 c = vec4(0.0);
+    if (uv.x < dividerValue) {
+        mat3 intensity;
+        float conv[2];
+        vec3 sample;
+        for (int i=0; i<3; ++i) {
+            for (int j=0; j<3; ++j) {
+                sample = texelFetch(source, ivec2(gl_FragCoord) + ivec2(i-1, j-1), 0).rgb;
+                intensity[i][j] = length(sample) * weight;
+            }
+        }
+        for (int i=0; i<2; ++i) {
+            float dp3 = dot(G[i][0], intensity[0]) + dot(G[i][1], intensity[1]) + dot(G[i][2], intensity[2]);
+            conv[i] = dp3 * dp3;
+        }
+        c = vec4(0.5 * sqrt(conv[0]*conv[0] + conv[1]*conv[1]));
+    } else {
+        c = texture2D(source, qt_TexCoord0);
+    }
+    FragmentColor = qt_Opacity * c;
+}