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Introduction

The purpose of this article is to help to work on video stream using a simple plugin approach. Instead of using a full DShow architecture, I use the FxEngine Framework from SMProcess.

My approach was the following: create a video source plugin using DShow's components and process video stream with one or several processing plugins using C++.

Background

The plugin is based on the StillCap sample from DShow SDK (SDK\Samples\Multimedia\DirectShow\Editing\StillCap). There is an excellent article by Chesnokov Yuriy about this.

Using the Code

Firstly, I used the Framework to build the plugin (Out pin, plugin's parameter, Win32 dialog and plugin interface). I just read sample code and the user's guide that comes with the Framework installation.

Secondly, I used DShow programming to get video data.

The video capture is done by:

• Creating an ISampleGrabber object to receive video data
• Retrieving the default video capture device using GetDefaultCapDevice() method
• Initializing video capture device using the InitVideoCapture() method

Using the Plugin

As shown in the screenshot above, I used the plugin in the Framework Editor to stream video data into several RGB splitters.

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Your Source Code is Incomplete GUI Developer 20:44 27 Sep '08   Hi, I didn't see any .fxe file or smproject file? How do you open the source you have in their editor? Could you add more explaination of how to use the editor with a sample .Fxe file? Thanks! GUI Guy Sign In·View Thread·PermaLink Re: Your Source Code is Incomplete m_sylvain 23:06 29 Sep '08   Hi, Yes, you're right, there is no '.fxe' file in this project. To use this plugin: 1) Download and install the FxEngine Framework on smprocess. 2) Download and compile the plugin source on this page. You could refer to the framework guide and directshow sdk to compile it if needed. 3) Using the FxEngine Editor, create new FxEngine layout (File menu + new FxEngine). 4) You can add and link any FxEngine Plugin (called Fx) in the layout including the FxVideoCaptureSrc compiled in step 2 (Insert menu + Insert Fx). In the codeproject screenshot, I have added in the layout: - FxVideoCaptureSrc to capture video from a webcam and to stream RGB data - FxRGBrlSplitter to split RGB data - FxRGBRnd to show RGB data in a window. You can after that, save your layout in the '.fxe' file and reload it when you want. I hope this lines will help you. Regards, S Sign In·View Thread·PermaLink 2.00/5

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