DM642通过mpeg4压缩摄像头采集的视频图像，并回放的功能-DM642 through the mpeg4 compression camera collection of video image, and playback function

H.264/MPEG4-AVC is the latest video coding standard of the ITU-T Video Coding Experts Group (VCEG) and the ISO/IEC Moving Picture Experts Group (MPEG). H.264/MPEG4- AVC has recently become the most widely accepted video coding standard sinc