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MP4 container format specification, Trying to write a low memory parser
saratoga
post Jan 10 2009, 22:41
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I've been working on making an mp4 parser for AAC files more memory efficient for targets with very little RAM. Unfortunately, just looking at source code for various parsers its somewhat difficult for me to see how the container actually works.

I've tried google but have found surprisingly little in the way of a detailed specification. Could someone recommend one to me?
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Yirkha
post Jan 11 2009, 04:02
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Wouldn't the original ISO/IEC 14496-12 (ISO Base Media File Format) or other standard document help you? Some of them are freely available for personal use in PDF here.


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spinchicken
post Jan 14 2009, 09:36
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QUOTE (Yirkha @ Jan 10 2009, 21:02) *
Wouldn't the original ISO/IEC 14496-12 (ISO Base Media File Format) or other standard document help you? Some of them are freely available for personal use in PDF here.



i also face these problem - but going through the standard doesnt help a lot

i think that the most problematic problem is that you cant tell id_syn_ele of the differant channles before you actually get them from the stream.
which of the streams are coupling channles? and which are not?
do the coupling channles always come in the start of the stream?

this causes me to save all the data of all channles and then process instead of getting the coupling channles first, save them and work on each data channle seperately.

i havent seen any answer to this in the standard or in
the free codes.
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