Timed Camera Capture - Update

re: Timed Camera Capture - Update

zechs888 — Thu, 08 Jun 2006 22:31:34 GMT

Actually I have a question. How do you set the resolution of the captured image?

re: Timed Camera Capture - Update

marcpe — Wed, 14 Jun 2006 19:07:17 GMT

Unfortunately you cant set the resolution directly. You can suggest the quality but its ultimately upto the capture device to decide what its going to send you.

Marcus

re: Timed Camera Capture - Update

thodac — Mon, 19 Jun 2006 10:39:41 GMT

hi, i'd like to modify cameracapture.dll to add a preview capture, do u know how can i do?

re: Timed Camera Capture - Update

marcpe — Mon, 19 Jun 2006 10:56:50 GMT

That's a little more tricky. I presume you want a 'video' preview - so the user can see the live feed from the camera - and then a still capture, right?
To achieve this you need to setup a video feed and stream the data to your preview window. When your user triggers a capture you need to stop the video feed and setup a still feed, then trigger a capture.
To setup the preview window should be a simple case of linkning the preview filter into the graph, but from my investigations it looks like there is no default preview filters installed. So you will need to create and use your own custom filter to achieve this.
I will have a go at this and post my finding when I get some time.

Marcus

re: Timed Camera Capture - Update

Jim P — Sun, 06 Aug 2006 14:50:56 GMT

Hello Marcus

Not a programmer, so excuse my lack of experience should the answer to my questions be an easy one. ;)

Does your 'code', once compiled and ready to be installed require a certain brand/type of PPC? Or will it work on any WM5?

Will the image size be controlled by the settings set in the device?

Having the feed as described above ('video' preview) is important to me - so I can see what the camera is about capture. Was a solution found/designed?

Do you contract out your skills?

Thanks

Jim

re: Timed Camera Capture - Update

Pak — Wed, 09 Aug 2006 18:20:27 GMT

Thank you for article.
I have another question about resolution. How suggest the quality?

re: Timed Camera Capture - Update

George Styles — Thu, 31 Aug 2006 20:52:54 GMT

Hi,

Many thanks for a great article.

I have the same question - how do you suggest the quality? ive got as far as

IAMStreamConfig *pConfig = NULL;
CHK(m_pCaptureGraphBuilder->FindInterface(
&PIN_CATEGORY_PREVIEW,
&MEDIATYPE_Video,
m_pVideoCaptureFilter,
IID_IAMStreamConfig,
(void**)&pConfig
));

AM_MEDIA_TYPE *pType = NULL;

pConfig->GetFormat(&pType);
pType->
pConfig->SetFormat(PType);
pConfig->Release();

but im not sure how to go about using pType to set the quality.

thanks
George

re: Timed Camera Capture - Update

George Styles — Thu, 31 Aug 2006 20:54:44 GMT

re: Timed Camera Capture - Update

Ryan Galgon — Tue, 12 Dec 2006 19:00:48 GMT

Any help on using IAMStreamConfig to enumerate the possible resolutions and select a higher one? I can't seem to get any code to work properly to do that.

re: Timed Camera Capture - Update

rgalgon — Tue, 02 Jan 2007 22:22:53 GMT

For everyone asking about changing the resolution look at the source code for the WiMoBot (in the WiMo Native DLL to be specific) it shows how to enumerate the resolutions and change them.

A question though, I noticed the code for taking the picture is a reworking of the CameraCapture code, is it possible to do this with video capture as well? I have tried adding in the missing components from the SDK Cameracapture sample and importing them and calling those functions directly but cannot get it to work. Help would be greatly appreciated.