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Does youtube store different video files for different bit rate? Yes is the technique called "resampling" ? No Does youtube make live resampling for every user ? No All this things happens live ? No, not on youtube. But Yes on twitch.tv Or it encode and save different video files for different bitrate, so that when a user ...


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Just to add a little bit more info to SlimSCSI's straight up answer. Does youtube store different video files for different bit rate? Yes and no, for the 1080p stream YouTube utilizes a technique called DASH. This serves essentially a video that was encoded with several different bitrates (though its one file) and adapts the bitrate on the fly ...


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The Wikipedia article on MPEG-4 is a great start as the MP4 file specification is part of the MPEG-4 spec. Specifically version 2 of MP4 is MPEG-4 Part 14. While not free, you can purchase copies of the ISO spec under ISO# 14496-14:2003. A preview with some detail is available from the ISO here. It is designed to contain any of the various MPEG video ...



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