How to enable (wdm analog) TV Closed Caption?

[Acwy Dash]

Hi, all,
I am using ATI TV Wonder USB (the old red one) in USA. The hardware is Nogatech/Zoran NT1004/NT1005. ATI's Multimedia Center program shows closed caption well. KMPlayer (WDM anolog not HDTV) is wonderful when playing TV, it has excellent video, audio and supper speed. But I haven't successfully make closed caption shown. Could some of you experts tell me how to make it happen?
Thanks

[z]

To display closed captions in analog tv (WDM), enable Out 1 and select VBI in WDM setup window (Ctrl+M).



What is VBI (Vertical blanking interval)?

The vertical blanking interval (VBI), also known as the vertical interval or VBLANK, is the time found between the last line of one frame or field and the beginning of the next. It is present in analog television, VGA, and DVI signals. During this time, the data that is transmitted is not displayed on the screen.

In analog television systems the vertical blanking interval can be used to carry data, for example, closed captions.

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[Acwy Dash]

thank you, green eyed Z.
In that combo box, I have only six options: capture, still, preview, audio capture, audio preview, bulk. VBI is not shown there. how can I make it out there? Does it come from TV tuner's driver/software set, or it is from kmp?
My kmp is 2.9.3.1214, the latest.
thank you

[Acwy Dash]

take a look

[z]

Does it come from TV tuner's driver/software set?

Yes, it is a standard interface from wdm driver. If you can't get VBI output pin, it seems to be unsupported in your TV wdm driver.

[Acwy Dash]

it is Zoran's driver, I searched the driver: Nuvision.sys and found a lot of VBI function names, like:
?OutstandingFrames@VbiStream@@MAEKXZ
?FrameSize@VbiStream@@MAEKXZ
?InitializeStream@VbiStream@@QAEXPAVCaptureAdapter @@PAVNTEncoder@@@Z
etc.
it seems like the driver supported them but not exposed them - it was a year 2001 product. I will do some research to figure out how to activate them.

[z]

The vbi function found within the driver does not mean that the driver supports vbi pin to expose in WDM driver. There would be no other way than to find the updated wdm driver. The WDM driver looks incomplete or simply does not support the standard interface to get vbi data containing closed caption (vbi pin).