title: Does the Transform() function decrease the frame rate of real-time video? Pin
body: <p>I have a question related to DirectShow transform filter.</p>
  
  <p>I use USB2.0 camera to get the real-time video at 30fps (1920x1080) and I want to process the video image by inserting a transform filter. But after the insertion, the frame rate is decreased. For example, the processing time is about 15ms, then the frame rate will drop to 1000/(33.3+15)=20.8fps. As if getting video data and processing video data are executed synchronously. </p>
  
  <p>How can I get the asynchronous execution and get a higher frame rate?</p>