[Mp4-tech] (no subject)

[Adam Potolsky]

Good day,
I am in the process of creating some code to gather various forms of data
from MP4 files, as well as, mpeg4 media content. Thus far I have been
successful in parsing boxes to gather information like the title of the
content (if present), etc. The difficulty I am having now is in trying to
get more technical information such as the bitrate, and the height and width
of a movie. Through my searches I have not found a source that describes how
this kind of data can be extracted from a file. I assume it's inside the
'mdat' box data, but trying to figure out what to expect there form the
thousands of pages of reference I have is very difficult. I have also looked
through several source code solutions and they have been quite difficult to
understand as they have lacked good source level comments and are not self
documenting. 
Is there a good source for this kind of information? Or, alternately, can
anyone key me off to what I'm missing about how to read the various specs
and code I have? (I have ISO/IEC 14496-lots, The MPEG Handbook, mplayer, the
reference source from ISO, and more.)
Thank you very much in advance for any help you can be.
Adam Potolsky
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