how to write part of application widow to vga or usb out as video stream

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how to write part of application widow to vga or usb out as video stream
Really what i want is part of application (square selection of app winfrom window) view on LCD (not in my lap top other LCD ) screen.

Posted 14-Mar-12 19:11pm

jayachanakya

Updated 14-Mar-12 20:24pm

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Sergey Alexandrovich Kryukov 15-Mar-12 2:16am

VGA? Video Graphic Array? If so, are you serious? What is the interface to external device?
--SA

jayachanakya 15-Mar-12 2:25am

how to write part of application widow to vga or usb out as video stream what i want is part of application (square selection of app winfrom window) view on LCD (not in my lap top other LCD ) screen.

jayachanakya 15-Mar-12 10:11am

Simply what i need is write video stream (normal video signal gives to monitor by VGA) to VGA port (extend VGA/ Laptop VGA out/ S-Video out/ HDMI out) or USB port.
Thank you,
Best Regards.

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OriginalGriff · Answer 1 · 2012-03-15T02:05:00

Solution 2

Sorry, but that isn't a question we can answer.

It is simple to "grab" a section of the desktop display.
It is simple to transfer data to the USB port.
It is simple to display data on a LCD.

Unfortunately, it isn't simple to combine the lot.

The screen grab will be at a particular colour depth - if this is not suitable for the LCD then it will need changing, either at the PC before transmission, or at the device after.

The transfer of data will almost certainly require some protocol - just sending raw data to any device is unlikely to result in a picture. Try it with you printer - send it a raw bitmap file directly, and see what it prints. Buy shares in a paper factory first.

The display of anything on an LCD is pretty simple - but you have to follow the rules and methods specified by the LCD or LCD controller hardware manufacturer.

Since we have absolutely no idea what kind of device you are connecting, we cannot help you in the slightest!

Posted 15-Mar-12 2:05am

OriginalGriff

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jayachanakya 15-Mar-12 10:06am

Thank you very much for reply on my post and sorry about to post my same Question on two places,
Simply what i need is write video stream (normal video signal gives to monitor by VGA) to VGA port (extend VGA/ Laptop VGA out/ S-Video out/ HDMI out) or USB port.
Thank you,
Best Regards.

OriginalGriff 15-Mar-12 10:47am

Um.
You do realize that VGA is ~25Mhz pixel clock? And that it is an Analog signal, not digital?
And the USB is digital, not analog?

jayachanakya 15-Mar-12 11:31am

Mr Griff,
just tell me how to write video stream to VGA out in OS if know (to Projector or Extended Display), that's only i need,
I am trying to develop Application for game score and i need to give video out of its out put to LCD or LED Display.
Thank You,
Beast Regards.

Dave Kreskowiak 15-Mar-12 13:18pm

OK, you keep saying "Just tell me how to write video stream to VGA". There is NO SUCH THING!

All you're doing is attaching a second monitor to the laptop. Windows should see it as a second monitor. There's nothing to do other than create your form as normal and change it's Location property to move it to the second monitor.

jayachanakya 15-Mar-12 22:58pm

Thank You very much Mr Griff,
you says there no ways to produce video from computer (video what we define) to other Display device, using any output ports like extend VGA/ Laptop VGA out/ S-Video out/ HDMI out / USB (there is USB to VGA converters)

Thank you very much
Best Regards.