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VMC-7440_v8_0_6_Quick Start_V1_0_0.doc
7.8.23. Why a circle display on TV is not a circle in BMP file?
It is important to realize that NTSC and PAL monitors have rectangular pixels whereas
computer monitors typically have square pixels.
For NTSC, the VMC-7440 card captures 720x480 pixels by image. This image displays
in a 720x480 windows resolution is larger than expected so it is necessary to display it in
a 640x480 window to be closer than a display on a TV.
For PAL, the VMC-7440 card captures 720x576 pixels by image. This image displays in
a 720x576 windows resolution is narrower than expected so it is necessary to display it
in a 768x576 to be closer than normal a display on a TV.
When creating picture for OSD, please note that you need to load a 720x576 picture for
PAL and 720x480 for NTSC whatever the size of the video preview.
7.8.24. Why my tga picture is displayed upside down after loading it into
the OSD buffer on Video Preview?
The VMC-7440 card support only one uncompress Truevision format which expects
having origin of the picture in lower left-hand corner.
It means that TGA file must have the bit 5 at offset 0x17 equals 0.
7.8.25. How can I use several VMC-7440 cards in the same system?
It is possible to control up to 16 VMC-7440 cards in the same system.
Three different solutions are possible for controlling several cards.
First solution: load one instance of application per board.
This is the quickest solution to set up. It requires 1 XML file per board and one instance
of application.
In this case, developer has to duplicate the standard xml file, edit it with a text editor and
replace the CLSID value of the VMC-7440 component in the component section with a
text editor.
The line to modify is the following one:
<Component CLSID="1F3E09CB-96AC-43BC-87F0-AC9F24F5B0EE" Name="VMC-
7440">
You have to replace 1F3E09CB-96AC-43BC-87F0-AC9F24F5B0EE by:
1F3E09CB-96AC-43BC-87F0-AC9F24F5B011 - for the 2nd card
1F3E09CB-96AC-43BC-87F0-AC9F24F5B012 - for the 3rd card
1F3E09CB-96AC-43BC-87F0-AC9F24F5B013 - for the 4th card
1F3E09CB-96AC-43BC-87F0-AC9F24F5B014 - for the 5th card
1F3E09CB-96AC-43BC-87F0-AC9F24F5B015 - for the 6th card
1F3E09CB-96AC-43BC-87F0-AC9F24F5B016 - for the 7th card
1F3E09CB-96AC-43BC-87F0-AC9F24F5B017 - for the 8th card
1F3E09CB-96AC-43BC-87F0-AC9F24F5B018 - for the 9th card
1F3E09CB-96AC-43BC-87F0-AC9F24F5B019 - for the 10th card
1F3E09CB-96AC-43BC-87F0-AC9F24F5B01A - for the 11th card
1F3E09CB-96AC-43BC-87F0-AC9F24F5B01B - for the 12th card
1F3E09CB-96AC-43BC-87F0-AC9F24F5B01C - for the 13th card
1F3E09CB-96AC-43BC-87F0-AC9F24F5B01D - for the 14th card
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