MP4 FAQ Discussion

[Stux]

Chapters: chapters storage is also possible by using advanced content, but Ahead goes another way and uses a feature called "user space" (udta atom) which allows you to attach anything you want in MP4 (tags, cd/dvd-covers, family pictures, viruses ). you will need a player/filter that can handle this special chapters info (ie aheads dshow filter)

I think it would be fair to mention the 3ivx DS Splitter's support for the Ahead/Nero style Chapters :)

[bond]

yep i added this info now

[alexnoe]

Where can I find a complete file format description? :devil:

[ac-chan123]

try http://www.iso.ch

AC-Chan(Robert Vincenz)

[alexnoe]

There, I find: ISO/IEC 14496-14:2003 PDF version (en) CHF 67,00 <= not quite what I meant

[SeeMoreDigital]

There might be some info here somewhere: -

http://mpeg4ip.sourceforge.net/index.php

Cheers

EDIT: Some more info here: -
http://mpeg4ip.sourceforge.net/documentation/index.php#standards

[alexnoe]

That's not very helpful either: I don't intend to reconstruct the MP4 file layout from some source code...

[SeeMoreDigital]

Sorry Alex,

Maybe bond can help you out, he seems to know where to find most things regarding Mpeg4.

In the meantime have you had a look at how MP4UI works?

Cheers

[alexnoe]

I already asked bond...maybe I really have to use the quicktime docu and then hope a bit that it is enough

[ac-chan123]

this document is to new, so i can´t find it on internet. it was know as "14496-Part 1: Systems, AMENDMENT 6: MP4 file format"and is now a new part. but at http://www.chiariglione.org/mpeg/ (chiariglione is the chef of MPEG) and http://www.itscj.ipsj.or.jp/sc29/ (official hompage of ISO/IEC JTC 1/SC 29 - jpeg, mpeg and so on) you can find much information.

AC-Chan(Robert Vincenz)

[bond]

Originally posted by alexnoe
That's not very helpful either: I don't intend to reconstruct the MP4 file layout from some source code... what smd meant was that there are docs on their cvs too

still i wouldnt look at the mpeg4ips tools that much, they are pretty b0rked ;)

[dimzon]

Haali Matroska Splitter (http://haali.cs.msu.ru/mkv/) - work fine with MP4 Container (AVC/AAC+). In combination with FFDSHOW it's able to view files from Nero Recode...

Now Haali's Parser can split:

1)MKV: very much formats are suported
2)MP4:mpeg1/mpeg2/mp3/ftypavc1/mp4v, mp4a and avc1 streams/VobSub
3)AVI

Read More (http://forum.inmatrix.com/index.php?showtopic=2385&st=0)

[ac-chan123]

what is ftypavc1 ?

[bond]

thx for the additions i updated the faq

Originally posted by ac-chan123
what is ftypavc1 ? dimzon mixed something up, that wasnt meant as a codec
haali wrote:
10/03/2005 Added 'ftypavc1' to the list of mp4 signatures.

[Kurtnoise]

Hi,

Some useful links which could be added : an Overview of H.264/AVC and MPEG-4 Codec Products (http://radio.irt.de/docs/codecs.html) and some structural atoms doc (http://www.mp4ra.org/atoms.html).

[SeeMoreDigital]

Nice find Kurt,

I wonder why the DivX/DXN Mpeg4 codec is not on the list?


Cheers

[bakel]

and i wonder where I can find good info about libavcodec... I’m trying to strip it but its little bit hard to do with such a big code :( I only need/want the h264 decoder part...

so if anyone has some suggestions about how I can do it or if someone find a doxygen output about libavcodec with those drawings about how the files are linked… please let me know

thnks in advance