I'm trying to create a WPF application that makes a Skype video call with the use of Kinect gestures (Kinect SDK v2.0). I want to use the Kinect color camera in the video call, while still be able to use Kinect in my WPF application to detect the "hung up" gesture. Is there a way to do this? While the Skype video call is active, I don't really need Kinects color stream in my WPF application. I just need the Body stream to detect the gestures. I'm using the Kinect for Xbox One.
Sure. It works out of the box like that.
The SDK 2.0 is designed specifically to enable "simultaneous multi-app support":
Improved multi-app support enables multiple applications to access a
single sensor simultaneously. - Developing with Kinect: Simultaneous multi-app support (on the very bottom)
There isn't anything special you have to consider. Since the SDK doesn't allow you to change any camera settings (like exposure time or gain), your applications basically just have read-access to the SDK, so they can't interfere with each other.
Just develop you applications separately and run them at the same time.
Related
Is there a way to prevent or disable video capturing of my WPF application? Probably some Win32 API calls or some mask over my WPF content. Or if it is imposible is there a way to at least prevent the most popular screen capture programs from recording what is happening in my WPF application?
To prevent an application from capturing window contents, you can call the SetWindowDisplayAffinity Windows API with a WDA_MONITOR affinity. While this prevents applications from capturing a screen, it will not prevent a user from whipping out their smart phone and taking a picture of the screen.
The API is available on systems running Windows 7 and later. It's also required that Desktop Window Manager composition is enabled. Turning off DWM composition will undo the effect, so you need to prevent users from turning DWM composition off. If you are running Windows 8 and later, this is not an issue, since Desktop Window Manager is always on.
I am trying to get webcam integration working with a WPF application. There have been a few questions here about getting a webcam functioning in WPF, in this case for image capture. Many people recommend the VideoCaptureElement from the WPF MediaKit. We are currently using this, however it doesn't appear to be particularly performant, there is high CPU usage, and the application experiences slow down after regular use of the camera.
We are looking into either integrating a Silverlight hosted solution, or an ActiveX webcam control hosted using a WindowsFormsHost. Has anyone successfully used either approach in a WPF application?
We decided to drop WPF MediaKit because it proved not to work on certain cameras (to do with pixel formats), and the project wasn't actively being developed.
Instead, we are now using the Capture class in the Emgu CV project, which works very well. There are lots of articles online about using Emgu CV to perform webcam integration.
I'm building a Silverlight Out Of Browswer Application with Elevated Permissions and need the ability to basically have the application listen for a keyboard shortcut such as doing something like Ctrl + F10 will cause a window to take focus of the screen... Personally I am against stealing focus but feel that this is alright seeing as the user invokes it themselves.
So more background... if any of you are familiar with applications like XFire or Steam.. I'd like to the ability to do a keyboard shortcut and have a window open above all the other applications like Steam can with the in-game windows.
If Silverlight can't do this can someone point me towards a better language where I can create this sort of application?
If Silverlight can do this can someone point me in the direction of how to accomplish this?
Silverlight 4 can't do this and Silverlight is not a "Language". Any application developement platform (JAVA, Delphi, VB6, .NET) that has full access to the windows API could do it.
Silverlight 5 includes support for PInvoke so if your willing to wait for the RC to go to RTM then you may be able to hook the system level WinAPIs needed to watch for a hotkey.
I am trying to create a multitouch application.
I have the hardware which will allow me to do this. On the software side I want to be able to have WPF textboxes, WPF web browsers, multiple focuses, multiple keyboards and multiple users at the same time.
From what I've seen, I can't be focused on two controls at the same time.
What is the Microsoft MultiTouch approach for this kind of job ?
The OS limitations are what they are (and don't appear to change in Win8): only one hWnd at a time can have focus.
Since you are using WPF though, everything within your application (with the exception of the WebBrowser control ActiveX widgets you may be using) is rendered within one big hWnd.
WPF 4 introduced native support for multitouch, including multi-touch capture. The APIs for this are many but pretty intuitive so I'll just say this... go to http://msdn.microsoft.com/en-us/library/ms590078.aspx and search within the page for all of the members with "Touch" in their name.
The catch however is that the controls shipping with WPF 4 don't work with the touch input events... you'll only be able to interact with one of those controls at a time. To take advantage of the multi-touch capture APIs, you'll have to create controls that are designed with it in mind. Fortunately, the Surface team at Microsoft has you covered on that... the "Surface 2.0 SDK" includes a suite of controls (usable on any Win7 machine, not just for Surface) that were built with this stuff in mind.
To create application with MultiTouch UI, use MultiTouch Framework in .Net
Go to http://multitouchvista.codeplex.com/
I am trying to evaluate which technology is best for my needs.
I need to display a video I get from some remote device, and let a user
interactively draw on it lines, polygons etc.
I searched and couldn't find any existing applications with this ability
(all the flash applications only displayed video).
Could anyone point me to such an application?
I haven't seen a specific app that allows you to do that, but I can tell you it would be fairly trivial to build it in Flex. You would simply create a transparent Sprite over the video clip, then use the Drawing API bound to various mouse events to do your drawing.
The final image can be saved by using BitmapData.draw() over the container that holds both the video and the canvas, and you can pass a bytearray encoded as PNG or JPG to a server-side script to save it.
I can't speak to Silverlight as I've never used it - but a Flex dev could build a basic sample of this for you in Flex in about 20 mins just as a proof of concept.
Where does your expertise lie?
Silverlight you could knock up a proof of concept rather easily and as Myk points out you could do the same in Flex. So your best bet is really whichever technology your current expertise lies in.
In Silverlight you could use a InkPresenter control above a MediaElement control in about 2 minutes up and running with a video file.
I think the hard part is finding a way to display realtime video from your specific device.
Silverlight supports streaming video so having that device talk with Windows Media Server or Silverlight Streaming sounds like the best bet.
Julie Lerman wrote an Silverlight app that you can draw on Images:
http://thedatafarm.com/blog/tablet/drawing-in-silverlight-article-in-msdn-magazine/
the article was presented at a magazine:
http://msdn.microsoft.com/en-us/magazine/cc721604.aspx
Hopes this helps.