I am trying to blur the part of video(Ex:Test.mp4) using QML ShaderEffect. I am getting the errors QOpenGLShader::compile(Fragment): WARNING: 1:2:GLSL version 1.20

[bhav]

fragmentShader: "
uniform float dividerValue = 0.7;
uniform float blurSize = 15;

uniform sampler2D source;
uniform lowp float qt_Opacity;
varying vec2 qt_TexCoord0;

void main()
{
vec2 uv = qt_TexCoord0.xy;
vec4 c = vec4(0.0);
if (uv.x < dividerValue) {
c += texture2D(source, uv - vec2(0.0, 4.0blurSize)) * 0.05;
c += texture2D(source, uv - vec2(0.0, 3.0blurSize)) * 0.09;
c += texture2D(source, uv - vec2(0.0, 2.0blurSize)) * 0.12;
c += texture2D(source, uv - vec2(0.0, 1.0blurSize)) * 0.15;
c += texture2D(source, uv) * 0.18;
c += texture2D(source, uv + vec2(0.0, 1.0blurSize)) * 0.15;
c += texture2D(source, uv + vec2(0.0, 2.0blurSize)) * 0.12;
c += texture2D(source, uv + vec2(0.0, 3.0blurSize)) * 0.09;
c += texture2D(source, uv + vec2(0.0, 4.0blurSize)) * 0.05;

} else {
    c = texture2D(source, qt_TexCoord0);

}
// First pass we don't apply opacity
gl_FragColor = c;

}

"
}