Only video cards with a video capture device, such as Nivdia MX460 Vivo video card, will have such a pin. The SampleGrabber code cannot be used if the capture device has a VP (Video Port) pin. This method can be used with VMR or VMR9 for sure, and sometimes this might work for Video Renderer also. The second method involves use of VideoMixingRenderer or the BasicVideo interface by calling GetCurrentImage(). Via SampleGrabber, a frame can be grabbed via a frame event or via GetCurrentBuffer. The first method to grab a frame is the SampleGrabber method. The first part shows how to grab a frame from a video stream, the second part shows the audio levels by making a VU meter! Grabbing a Frame from a Video Stream BackgroundÄirectShow offers two basic methods to grab a frame or an image that is going to be rendered. This article will explain how to use the SampleGrabber for audio and video. Those articles describe how to do file saving for captured audio and video and to finetune a TV tuner. DirectShow: TV Fine-tuning using IKsPropertySet in C#.Video File Saving in Windows Media Video Format for the DirectX.Capture Class Library.Audio File Saving for the DirectX.Capture Class.This article is a follow-up of my previous articles: Download Audio VU Meter source - 302.21 KB.Download Audio VU Meter demo - 95.36 KB.Download SampleGrabber source - 278.47 KB.
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