Re: DirectShow Filter S-Video
From: Alessandro Angeli [MVP::DigitalMedia] (nobody_at_nowhere.in.the.net)
Date: 06/15/04
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Date: Tue, 15 Jun 2004 20:49:35 +0200
Most video cards with S/Video output can mirror the main
display. A few, can also mirror the contents of the overlay
surface in fullscreen, covering the desktop when the overlay
is in use and the video mirroring is enabled. Among those,
nVidia's and Matrox' cards (respectively, Overlay/VMR Video
Mirroring and DVDMax settings). AFAIK, VIA/S3's and ATI's
can't (but maybe the latest ATI's cards can). Anyway, it is
a function of the video card's driver and not of any
specific filter: as long as the driver supports the video
mirroring and the filter uses an overlay surface, it works
by itself. The VMR7, the OverlayMixer and the old
VideoRenderer all use DirectDraw's overlay (the VR olny when
available and may switch to GDI). The VMR9 never uses an
overlay.
jj00 wrote:
> Thanks for your input. I'm wondering if my
> hardware/drivers are to
> blame. I'm trying to do this on a Dell laptop (Inspiron
> 1100) with
> Intel video drivers. In Windows, I can set the display to
> "television", and it sends the desktop video to the
> S-Video port.
>
> I was trying to set up a situation where I set up a video
> in GraphEdit (an AVI file or webcam as input) and send
> the result to the S-Video
> port. It made sense when I first started looking into
> this, but now
> I'm starting to think that the driver wasn't made to be
> that diverse.
>
> I haven't found any documentation or filter that would
> allow me that
> kind of functionality. I'm thinking that the driver is
> only meant to
> send the entire Windows Desktop display to the S-Video
> port, and
> nothing else. It's a shame if it is like that, because it
> would be an
> awesome feature.
>
> Can anyone make any suggestions as to whether I'm on the
> correct
> track? Of course I can't expect anyone to be an expert on
> my
> particular laptop, but I'm starting to think that most
> video cards are
> set up like this.
>
> Thanks in advance...
>
> -jj
>
>
>
>
>
> calpgrmr@aol.com (CalTheProgrammer) wrote in message
> news:<2179a083.0406141724.29544631@posting.google.com>...
>> I agree. My old Dell lap-top has a S-Video output,
>> doesn't look too bad.
>>
>> Cal the Programmer
>>
>>
>>
>> "Alessandro Angeli [MVP::DigitalMedia]"
>> <nobody@nowhere.in.the.net> wrote in message
>> news:<uvKD3OjUEHA.2408@tk2msftngp13.phx.gbl>...
>>> It all depends on what you mean by "exporting to
>>> S/Video". What kind of S/Video output hardware do you
>>> have?
>>>
>>>
>>>
>>> jj00 wrote:
>>>
>>>> Hello,
>>>>
>>>> I'm an intern working at a company that has assigned me
>>>> with looking into DirectShow filters. So far I've been
>>>> using graphedit to play around with different filters
>>>> to get different effects (I used a text overlay the
>>>> other day).
>>>>
>>>> Here is my question. They want me to find a way to
>>>> export video to S-Video. I'm able to get my resulting
>>>> video to show on the screen, but I'm clueless on how to
>>>> set up something to the S-Video port.
>>>>
>>>> Here is my current setup (in GraphEdit):
>>>>
>>>> Desktop Video Camera -> AVI Decompressor ->
>>>> Color Space Converter -> Text Overlay ->
>>>> Color Space Converter -> Video Renderer
>>>>
>>>> I'm not even sure if I can even change the video to
>>>> export to S-Video from GraphEdit, but I can't see why
>>>> not. I'd love to be able to show the video on the
>>>> screen, and through S-Video at the same time, though
>>>> I'm not sure how I would do so with a filter.
>>>>
>>>> Does anyone have any advice? I've been searching all
>>>> over the web for filters, but there doesn't seem to be
>>>> anything mentioned about S-Video; which leads me to
>>>> belive that it is either something simple I'm
>>>> overlooking, or not possible.
>>>>
>>>> Thanks for your time...
>>>>
>>>> -jj
>>>
>>> --
>>>
>>> /**
>>> * Alessandro Angeli
>>> *
>>> * MVP :: Digital Media
>>> *
>>> * a dot angeli at biosys dot net
>>> */
-- /** * Alessandro Angeli * * MVP :: Digital Media * * a dot angeli at biosys dot net */
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