/usr/share/kdenlive/effects/frei0r_hueshift0r.xml is in kdenlive-data 16.12.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 | <!DOCTYPE kpartgui>
<effect tag="frei0r.hueshift0r" id="frei0r.hueshift0r">
<name>Hue shift</name>
<description>Shifts the hue of a source image</description>
<author>Jean-Sebastien Senecal</author>
<parameter type="simplekeyframe" name="Hue" default="0" min="0" max="360" factor="360">
<name>Hue</name>
</parameter>
</effect>
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