[FFmpeg-devel] AAC support in SDP

Luca Abeni lucabe72
Wed Sep 5 08:27:27 CEST 2007

Hi Luca,

Luca Barbato wrote:
>> This look interesting... So, it can be used for h.264 too? I did not 
> I was thinking about adding the packetizer I have in feng to ffmpeg...

Is it implementing rfc3984? Which mode? (I think Non-interleaved mode is 
  the most reasonable thing to implement).
I have some half-working code for it... If you plan to commit your code 
from feng, let me know and I'll stop working on my one (to avoid 
duplicated effort).

>> find references to it in RFC3640, but maybe there is some updated RFC?
>> I only tried RFC3640 packetization with aac, but I'll run some other 
>> tests soon
> the 3640 explains a method to packetize anything you can put in an mpeg4
> elementary stream, more or less

Ok, I re-read it, trying to better understand the "Generic Mode". But 
how can a client understand what's the content of a stream packettized 
in generic mode? If I get it right, there is nothing in the SDP that 
specifies if the stream is audio, video, or something else (and I do not 
think the config information is enough to understand what a stream is...).

Anyway, I tried to do some experiments, but I did not find any client 
able to receive and correctly understand RFC3640's generic mode.
So, for the moment I only implemented AAC-hbr mode :)


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