
MP4 is short for Moving Picture Expert Group-4. A MPEG-4 file may contain any number of audio, video, and even subtitle streams, making it impossible to determine the type of streams in an MPEG-4 file based on its filename extension alone. A lot of portable players support MP4 files, such as iPod, iPhone, PSP, Creative Zen, iRiver PMP, Archos, PS3, Xbox… When we have a mp4 file, we can put it o...
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