MPEG-4 was opened by MPEG (MovingPictureExportsGroup) in 1999 as the first edition and was formally declared to be the international standard in the early 2000. It differs greatly from both MPEG-1 and MPEG-2. MPEG-4 content-based multimedia data access tools and editing functions for the operation and bit-stream of contents so that users could alternatively get the relative items on interactive home shopping. With the perfect technology of first-generation video encoding as the core technology and other key technologies like video object segmentation, Video Object encoding, scalability, motion estimation and compensation, it becomes widely and safely applied in internet.

To synchronize/sync mpeg4 file, The containers such as mp4, mov, avi, rm, mkv, ogm divx supports mpeg-4 stream. please install the appropriate video filter and audio filter for the mpeg4 format such as FFDshow, divx, xvid, HDX4 codec, or MainConcept decoder. 

Download Audio Video Synchronizer which can synchronize audio/video of an mpeg4 file. Click the Options button, select Output Format with WMV.

MPEG-2 is one of the formal international standard of active image and sound coding developed by MPEG (Moving Picture Exports Group) in 1994. It consists of 9 standards itself ,and has many distinguished features such as: high transfer rate and resolution, broadcast-like video and CD-like audio, many ways of surround channels and audio channels, etc. Besides, it provides broader scope of changing compression ratio. With those characters, MPEG-2 is adapted to HDTV which thus makes MPEG-3 discarded before its birth.

To synchronize/sync audio/video of mpeg2 , please install a dvd player such as PowerDVD Player or WinDVD Player for the mpeg2 decoder.