_bgcolor_

Background color.

Type	Default	Overwritable
Global	black	Yes

_fgcolor_

Foreground color.

Type	Default	Overwritable
Global	white	Yes

_width_

Width of the previously processed video. For example,

<stream>
   <composite name="color" width="720"/>
   <print value="$_width_"> <!-- this will print 720 -->
</stream>

Type	Default	Overwritable
Global	N/A	No

_height_

Height of the previously processed video. For example,

<stream>
   <composite name="color" height="480"/>
   <print value="$_height_"> <!-- this will print 480 -->
</stream>

Type	Default	Overwritable
Global	N/A	No

_fps_

FPS of the previously processed video. For example,

<stream>
   <composite name="color" fps="24"/>
   <print value="$_fps_"> <!-- this will print 24 -->
</stream>

Type	Default	Overwritable
Global	N/A	No