title: How do you manually extract (decapsulate) an H.264 bitstream from an MP4 file
body: <p>Would extracting an H264 bitstream from an MP4 is achieved just by appending all raw data from a video track in an H.264 MP4 file, or is there some special decoding steps to realize?</p>
  
  <p>There are some H.264 decoder sources here and there that take a pure "264" track as input. Is this input directly readable / available from the average MP4 file? (Let's say the common iOS or Windows Phone MP4 AVC file type.)</p>