I would like to record a video with audio using the Freescale multimedia codecs on an iMX515 board. With the help of some examples I have been able to create a DirectShow filter that can preview the camera and capture video. However, I am having trouble adding audio to the video. I cannot determine what filter to use so that I can capture the audio from the microphone. If anyone has done this before could they help me add audio capture to the DirectShow graph?