Windows CE 6.0 supports DirectShow® components to develop a rich camera application. A minimum requirement of the camera application is to show preview, capturing the still images which is stored as a compressed file (JPG) format, capturing/multiplexing the video with or without audio i.e. stored as a compressed file (WMV) format. See the below given blog link on how to achieve the performance...
http://www.e-consystems.com/blog/windowsce/?p=415
http://www.e-consystems.com/blog/windowsce/?p=415
