In fact,MP4 is not a file format,it just like MP3 Player,but it can play video.MP4 is not MPEG-4,it is just a device.
MP4 means a decode/encode way,include:
Audio:AAC;Video:AVI,ASF,WMV,MPEG-1,MPEG-2,MPEG-4
So these files are belong to MP4 family.
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In fact,MP4 is not a file format,it just like MP3 Player,but it can play video.MP4 is not MPEG-4,it is just a device.
MP4 means a decode/encode way,include:
Audio:AAC;Video:AVI,ASF,WMV,MPEG-1,MPEG-2,MPEG-4
So these files are belong to MP4 family.