Olle E. Johansson a écrit :
27 maj 2009 kl. 13.13 skrev Emmanuel BUU:
Hello,
There is one particular topic (which is HUGE) but very interesting:
asterisk codec negociations (video, audio, text, ...). It is absolutly
awul in the official version.
We have been working on a variant of the videocaps branch that mas
originaly brought by John Martin from Aupix and mainained by Olle. At
some point of time, there was plans merge it into the official 1.6
version but it never happened and I have no news of such a move. We
are
still correcting nego issues and it seems that the videocaps
approach is
reaching its limits. For two reasons:
* The videocaps structure is redundant with nativeformats and all
the formats used in the various chans and modules
* The videocaps does not properly handle codec preference order.
On the other hand, I have recently discovered that the Sippy software
company had also made a codec nego patch
http://www.b2bua.org/wiki/AsteriskCodecNegotiationPatch that is much
cleaner and more integreated in asterisk core.
My project would be to launch on top of the 1.6 videocaps branch a
merge
between Sippy patch, some IVèS stuff (URL sending support, RTP
redundency negociations, ...) and videocaps (because its handling
fmtp
attributes) and finally have a PROPER negication algorithm more in
line
with RFC 3264, including proper transcoding behavior and early media
support. Ideally, Olle should be implicated.
Ok, that's HUGE. But why not try the collaborative effort to improve
our
beloved Asterisk software?
That sounds like a good plan. I also need a version for 1.4.
Well we have backported videocaps to 1.4 here.
The Digium team is working on a more long term solution for trunk,
based on input but not code from videocaps and several other patches,
including Maxim's codec negotiation patch.
Hum as usual I guess ...
Regardsless, it would be interesting to get help to continue the work
on videocaps. Right now it's broken and needs help to get back into
automerge mode, which would be a first step.
How do we do this?
I have been maintaining videocaps for a long time on my personal time,
since I know it solves a lot of issues and it's really a good platform
to start from that John donated to the project.
Yup. We do use it.
/O
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