aacparse progress ? ADTS to raw and vice versa

[Tim-Philipp Müller]

On Thu, 2013-09-12 at 17:46 +0200, Peter Maersk-Moller wrote:

Hi,

> In the last couple of month every now and then there has been mails on
> converting between raw and ADTS AAC suggesting using aacparse pretty
> much like h264parse works converting between NAL and AU delimited h264
> streams. Nevertheless, as also stated in mails, aacparse does not yet
> have that capability.
> 
> 
> Is an AAC adts to raw converter something that is in the development
> plans for GStreamer in a foreseeable future? Can it be that difficult
> to rip off the ADTS encapsulation (asking without knowing the full
> implication I admit)?

I believe this is supposed to be implemented in git master / 1.1.x, see

 https://bugzilla.gnome.org/show_bug.cgi?id=615740

Cheers
 -Tim

> 
> Why this is interesting is because various modules requires various
> format of AAC making reuse of the same AAC stream difficult.
> 
> 
> flvmux wants a raw aac stream while mpegtsmux wants a adts stream. Now
> mpegtsmux says it can handle both raw and adts, which may or may not
> be true, but I believe the TS format specify the AAC stream when
> leaving the muxer to be ADTS formatted inside the TS stream. This has
> the complication that in the other end that I can only get a ADTS
> stream out of the TS demuxer (tsdemux only supports adts) and only if
> I feed the tsmuxer an ADTS stream. If I feed the TS muxer a raw stream
> and and ask the demuxer to demu it, the result is varying and often
> leading to a permanent preroll.
> 
> 
> Kind regards
> 
> Peter Maersk-Moller
> 
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