Cisco Cisco StadiumVision Mobile Streamer Maintenance Manual
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Figure 6.
Overlay screen templates
Content Creation for Overlay Graphics
The DMP 4310G uses the alpha-channel of the graphics plane (PNG, SWF file
types). Therefore, content creators can use the alpha-channel to allow the
background video to show through.
types). Therefore, content creators can use the alpha-channel to allow the
background video to show through.
Transparency is supported by use of chroma-keying (where the background video
can be seen through a particular color in the graphics).
can be seen through a particular color in the graphics).
If you plan to use the overlay feature, consider that that JPG files have no
transparency while PNG files have transparency. When you create the PNG file,
you must make the pixels transparent for the full-size flash region.
transparency while PNG files have transparency. When you create the PNG file,
you must make the pixels transparent for the full-size flash region.
When using overlays, you may not want to mask too much of the video feed.
Therefore, it is recommended that you make the video region slightly smaller than
full screen (though large enough to fill the transparent area).
Therefore, it is recommended that you make the video region slightly smaller than
full screen (though large enough to fill the transparent area).
Note: The Global MIB Variable on the DMP needs to be changed to Color Key “Off”
or you will not be able to create graphics with 00 Black (R:0 G:0 B:0) or anything
black will appear transparent.
or you will not be able to create graphics with 00 Black (R:0 G:0 B:0) or anything
black will appear transparent.
Figure 7.
Overlay Template Specifications