Text Overlay   

Anyone know how to add text overlays when encoding or after? I am using the 
sdk for screen capture and I want to write the current date and time as a 
text overlay within the encoded file.

Any pointers or tips appreciated

date: Tue, 1 Jul 2008 15:56:32 +0200   author:   ChevronBoyde

Re: Text Overlay   

From: "ChevronBoyde"

> Anyone know how to add text overlays when encoding or
> after? I am using the sdk for screen capture and I want
> to write the current date and time as a text overlay
> within the encoded file.

You need write a video DMO (they are documented in the 
DirectShow section of the Windows SDK) and use it as plugin 
in WME9. You can write DMOs in .NET via COM InterOp if you 
want to, but the SDK only supports C++.

-- 
// Alessandro Angeli
// MVP :: DirectShow / MediaFoundation
// mvpnews at riseoftheants dot com
// http://www.riseoftheants.com/mmx/faq.htm

date: Tue, 1 Jul 2008 10:31:11 -0400   author:   Alessandro Angeli

Re: Text Overlay   

On Jul 1, 4:31 pm, "Alessandro Angeli" 
wrote:
> From: "ChevronBoyde"
>
> > Anyone know how to add text overlays when encoding or
> > after? I am using the sdk for screen capture and I want
> > to write the current date and time as a text overlay
> > within the encoded file.
>
> You need write a video DMO (they are documented in the
> DirectShow section of the Windows SDK) and use it as plugin
> in WME9. You can write DMOs in .NET via COM InterOp if you
> want to, but the SDK only supports C.
>
> --
> // Alessandro Angeli
> // MVP :: DirectShow / MediaFoundation
> // mvpnews at riseoftheants dot com
> //http://www.riseoftheants.com/mmx/faq.htm

If you are using MS Encoder SDK, add ffdshow filter as plugin, and
configure it to add overlays.
If you are using WMF SDK, then you will need to do little more muscle
work, so use ffdshow instead :).

Or if you really need WMF SDK low level of control, then make hybrid
solution, creating DirectShow graph with WM ASF Writter object,
inserting FFDShow as text overlayer and accessing WM ASF Writter's WMF
interfaces.

In such combination, you can have it all, file writes, network
outputs, push etc.

Jerislav

date: Wed, 2 Jul 2008 02:46:34 -0700 (PDT)   author:   Jerislav