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POC++ DirectShow Video and Audio capture - beginning
 

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    <p>I have finally managed to drop working with VFW after several problems I have encountered during the application development.</p> <p>Thanks to StackOverflow, I am now aware that VFW is obsolete and wish to switch to DShow, to let my application work with Vista/W7.</p> <p>Unfortunately, the work has been made and application has been shipped to the client, but as soon as we realized we have troubles with frame rates on Vista / W7 - we decided to rewrite the video class and use DirectShow to establish a good audio/video capture engine for webcameras.</p> <p>This will be tricky, as we never coded with DShow, and right now we are looking for few specific examples of how to:</p> <ul> <li><p>Connect to a selected webcamera</p> <p><strong>similar to: capDriverConnect</strong></p></li> <li><p>Set camera resolution to 640x480 and RGB24 format ( we need to do RGB24 to YUV420 for each frame )</p> <p><strong>similar to: capSetVideoFormat / capCaptureSetSetup</strong></p></li> <li><p>Set audio capturing for this webcamera </p> <p><strong>similar to: capSetAudioFormat</strong></p></li> <li><p>Register two callbacks:</p> <ul> <li>One for video frame ( we will pass frames to video encoder )</li> </ul> <p><strong>similar to: capSetCallbackOnVideoStream</strong></p> <ul> <li>One for wave buffer ( we will pass wave buffer to audio encoder )</li> </ul> <p><strong>similar to: capSetCallbackOnWaveStream</strong></p></li> <li><p>Be able to show a preview window somewhere on parent window</p> <p><strong>similar to: capPreview</strong></p></li> <li><p>Perform Start/Stop operation when needed</p> <ul> <li>Start - would mean, connect and start capturing audio/video frames</li> <li>Disconnect - would mean, stop capturing audio video frames</li> </ul></li> <li><p>Perform drawing to the actual frame </p> <p>similar to:</p> <p>SetBitmapBits(CameraInput.GetFrameBitmap(),w*h*3,vdhdr->lpData); // draw something with gdi+ GetBitmapBits(CameraInput.GetFrameBitmap(),w*h*3,vdhdr->lpData);//set back the frame with data</p></li> </ul> <p>All of the above was already made with VFW, but as I wrote before we unfortunately need to switch do Direct Show.</p> <p>Is there anyone who could help us out achieving a class that could rescue us from months of studying Direct Show ?</p>
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