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  1. PO
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    <p>Maybe you could just use expoblur over the QImage and re-encode the blurred video.</p> <p><a href="http://www.qtcentre.org/archive/index.php/t-26534.html" rel="nofollow">http://www.qtcentre.org/archive/index.php/t-26534.html</a></p> <pre><code>static QImage blurred(const QImage&amp; image, const QRect&amp; rect, int radius, bool alphaOnly = false) { int tab[] = { 14, 10, 8, 6, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2 }; int alpha = (radius &lt; 1) ? 16 : (radius &gt; 17) ? 1 : tab[radius-1]; QImage result = image.convertToFormat(QImage::Format_ARGB32_Premultiplied); int r1 = rect.top(); int r2 = rect.bottom(); int c1 = rect.left(); int c2 = rect.right(); int bpl = result.bytesPerLine(); int rgba[4]; unsigned char* p; int i1 = 0; int i2 = 3; if (alphaOnly) i1 = i2 = (QSysInfo::ByteOrder == QSysInfo::BigEndian ? 0 : 3); for (int col = c1; col &lt;= c2; col++) { p = result.scanLine(r1) + col * 4; for (int i = i1; i &lt;= i2; i++) rgba[i] = p[i] &lt;&lt; 4; p += bpl; for (int j = r1; j &lt; r2; j++, p += bpl) for (int i = i1; i &lt;= i2; i++) p[i] = (rgba[i] += ((p[i] &lt;&lt; 4) - rgba[i]) * alpha / 16) &gt;&gt; 4; } for (int row = r1; row &lt;= r2; row++) { p = result.scanLine(row) + c1 * 4; for (int i = i1; i &lt;= i2; i++) rgba[i] = p[i] &lt;&lt; 4; p += 4; for (int j = c1; j &lt; c2; j++, p += 4) for (int i = i1; i &lt;= i2; i++) p[i] = (rgba[i] += ((p[i] &lt;&lt; 4) - rgba[i]) * alpha / 16) &gt;&gt; 4; } for (int col = c1; col &lt;= c2; col++) { p = result.scanLine(r2) + col * 4; for (int i = i1; i &lt;= i2; i++) rgba[i] = p[i] &lt;&lt; 4; p -= bpl; for (int j = r1; j &lt; r2; j++, p -= bpl) for (int i = i1; i &lt;= i2; i++) p[i] = (rgba[i] += ((p[i] &lt;&lt; 4) - rgba[i]) * alpha / 16) &gt;&gt; 4; } for (int row = r1; row &lt;= r2; row++) { p = result.scanLine(row) + c2 * 4; for (int i = i1; i &lt;= i2; i++) rgba[i] = p[i] &lt;&lt; 4; p -= 4; for (int j = c1; j &lt; c2; j++, p -= 4) for (int i = i1; i &lt;= i2; i++) p[i] = (rgba[i] += ((p[i] &lt;&lt; 4) - rgba[i]) * alpha / 16) &gt;&gt; 4; } return result; } </code></pre>
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    1. POlibVLC and blur videos
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    1. USAriel
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    1. COIt's not true way.Partially because the VLC player is able to blur the video.And I seriously doubt that it is impossible to make it easier
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      1. PO
      1. USDcow
 

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