文章描述了如何做文件捕获音频和视频以及电视调谐器微调储蓄。本文将解释如何使用音频和视频的SampleGrabber。第一部分展示了如何抓住从视频流一帧，第二部分显示了作出VU表的音频电平-Those articles describe how to do file saving for captured audio and video and to finetune a TV tuner. This article will explain how to use the SampleGrabber for audio and video. The first part shows how to grab a fr a me from a video stream, the second part shows the audio levels by making a VU meter