Project announcement : New opensource AAC DirectShow filter, hosted on corecodec.org

I have the pleasure to announce that a new opensource project was started on corecodec.org today, aiming to offer a free alternative to existing AAC DirectShow decoder filters for educational purposes. The bigger part of the code was taken from a similar project on , which by itself is based on the FAAD2 decoder from the FAAC project ( ). All sourcecode is released under the GPL license, just like the original projects. The developers are aiming to add 5.1 multichannel playback now soon, being the first decoder filter with this capability. As an educational project the project admins have to remind everybody that distribution of compiled binaries of the decoder filter may violate the licensing shedule of the AAC (TM) license holders, depending on the country you are living in, and should not be undertaken by any means. The developers of this project can not be held responsible for such license violations by other people. They strongly advise everybody to compile the decoder filter only for its original intention, that is for educational purposes. Christian HJ Wiesner Germany, 20th May 2003 Original message :

just 2 cool ;)

Awesome. ^_^

Ahemm, well, i have been a little bit too quick maybe :D !! Toff hasnt uploaded any sourcecode to the CVS yet, so it was maybe not correct to make a great announcement already, but i was too tired last night to realize this and was almost acting automatically .. LOL. He told me that he first wants to get 5.1 playback working, and would then go upload the sourcecode. Hopefully i can convince him to upload the version he has right now also, or he will maybe have great fun watching me getting nervous :rolleyes: ... BTW : the released binaries in the 'AAC in matroska' thread is a compilation of this existing source, but the link will be taken down latest by tonight. The filter is still using the borgtech wFormat tag of '0xAAC1', we will very likely change this to either '0x00FF' like 3ivx and Nic's filter are using, or '0xFAAD' as proposed by menno, the author of FAAC/FAAD ;) ....

Ok, Toff uploaded the code to CVS @Nic : pls. get an account on corecodec.org, you could help us a lot with making it 5.1 capable :) ....

Why can't you put aac into ogm? Any reason? Regards Koepi

bonz1, dext: i did some research and found the -nh switch as well (never experimented with aac until now). I guess the problem is that AACMachine doesn't support that switch (yet). And well, a DSF can always buffer a bit of data ahead so it should be perfectly possible to add an aac to ogm (that's why i put it into oggmux in first place, people asked for it). So let's stop this unjustified badmouthing (ogm can't cope with it) and single-sided advertisement for unfinished file containers(matroska rules the world). I'm a little disapointed that you're doing that. I hope this changes in future. Regards Koepi

Indeed, but for that to be relevant I must have overlooked the country limitations menno added to FAAD2 ... where should I look?

I dont remember that either Lame, XviD or FAAC put country limitations in their sources or licenses, so dont expect us to do that MfA .... please !

You're wrong about XviD. Id just prefer that you be truthfull, and warn that this software isnt really GPL whatever the license included says. By acknowledging the patent issues you are already doing this in a way, but in a very roundabout way. Lets be honest about it. When corporations misuse the GPL in this way they usually do it for nefarious purposes. They pretend software is being released under the GPL, but dont license the patents so they can always have a stick to beat you with if you do something with it they dont like (an example is Lizardtech with the DjVu software). When the open source community starts playing the same charade because they are so eager to use the GPL they legitimize those companies ... which is not something to strive for.