[Asterisk-video] Asterisk and video contents for 3G network

[tech at i6net.com]

Can you confirm that 3G (H324M) handle the video with H263/H263+ codec ?
If Asterisk could play video contents, this should be in H263/H263+/H263
format/codec.

Selon Ramtin Amin <keytwho at hotmail.com>:

> I've pretty much implemented my 3G gateway using Asterisk.
> I can currently handle H223 annexe A and B with Golay, AL1 and AL2 with 16bit
> CRC, H245 , AMR-NB in if2 format,  + H263 qcif.
> I need to do some fixing to make it clear.
> I could eventually transcode the AMR-NB using ffmpeg but that wouldn't let it
> be LGPL anymore and wouldnt be able to implement it insize chan_zap.c but if
> I don't decode the AMR, then the SIP phone behind has to be capable of
> handling AMR-NB...
> If someone wants some info, you are welcome!
>
>
>
>
> > Subject: RE: [Asterisk-video] Asterisk and video contents for 3G network>
> Date: Thu, 24 Aug 2006 12:03:56 +0200> From: proudel at nortel.com> To:
> proudel at nortel.com; asterisk-video at lists.digium.com> CC: > > The video codecs
> optimized for 3G are 3GP or 3GP2> > -----Original Message-----> From: ROUDEL,
> PHILIPPE (CTF:8R50) > Sent: jeudi 24 août 2006 12:02> To: 'Development
> discussion of video media support in Asterisk'> Subject: RE: [Asterisk-video]
> Asterisk and video contents for 3G network> > 3G video do not use H... (H263
> or H245) protocols only AMR video conversion (transcoding) is required.> >
> -----Original Message-----> From: asterisk-video-bounces at lists.digium.com
> [mailto:asterisk-video-bounces at lists.digium.com] On Behalf Of Sergio García
> Murillo> Sent: lundi 24 juillet 2006 12:23> To: Development discussion of
> video media support in Asterisk> Subject: RE: [Asterisk-video] Asterisk and
> video contents for 3G network> > tech at i6net.com wrote:> > Have any one test
> an Asterisk throw a 3G gateway (constuctor,> > reference) ? > I have made
> some test calls against some 3G video gateways, they are much nicer in the
> h245 negotiations and don't complaint with slight differences in the order of
> the messages. > > > How to you generate the video contents to pass throw the
> 3G GW (tool> > to manage the video files .h263)? > > The encoding, bitrate
> and timing seems to be very important to have a> > good quality on the 3G
> phone... how control this parameters ? > > Currently we don't have
> transcoding capabilities in asterisk for video (and I don't think we will
> have it in the near future) the h263 should be optimized in the source for
> 3G. GSM Amr need also to be supported, at least be able to pass trough (I
> have seen many phones supporting g723 but I think you can't grant that all
> terminals support it).> > Greetings> Sergio> > > > > > > i6net> > > > > >
> Selon Sergio García Murillo <Sergio.Garcia at ydilo.com>:> > > >> > >> H223
> Annex B without double headres (H324M level 2).> >> If you are looking at the
> UCLA/Samsung h223 simulator i understand> >> that you think it's not easy,
> but i have still not found any device> >> (phone or gateway), that implements
> annex C.> >> I use zaptel and a libpri, it would need some modification in
> order> >> to > >> be configurable, but hardcoding the q931 setup info is
> quite easy.> >> > >> ________________________________> >> > >> From:
> asterisk-video-bounces at lists.digium.com> >>
> [mailto:asterisk-video-bounces at lists.digium.com] On Behalf Of Ramtin> >>
> Amin> >> Sent: lunes, 24 de julio de 2006 8:26> >> To: Development discussion
> of video media support in Asterisk> >> Subject: RE: [Asterisk-video] H324M 3G
> ISDN> >> > >> > >> Well I'm working on ir currently> >> So if we want to do
> it, since it doesn't look that easy, we better> >> share our knowledge about
> it.> >> Sergio: In H223, which annexe is used ?> >> I've found some
> interesting stuff capable of handling the H223+245> >> but > >> I wanted to
> understand it more and when you look at the ITU, and it> >> gets into the
> Golay(24,12) and BCH code, it starts to become more> >> complicated :) Tell
> us more about your expiriance: you modified the> >> libpri for answering
> correctly the q.931 ? You use /don't use  zaptel> >> ? How do you capture raw
> data ? cat /dev/zap/12 ? or with an> >> app_zapgrab ? > >> DO you use BRI or
> PRI ?> >> > >> > >> > >> > >> > >> > >> > >> > >> > >>
> ________________________________> >> > >>  Subject: RE: [Asterisk-video]
> H324M 3G ISDN> >>  Date: Mon, 24 Jul 2006 08:15:06 +0200> >>  From:
> Sergio.Garcia at ydilo.com> >>  To: asterisk-video at lists.digium.com> >> > >> >
> >>  Hi everyone,> >> > >>      It's good to see that i'm not the only one
> developping int this> >>  subject. I have been working on an h234M library, i
> have finished> >> AL1 and AL2 > >> of h223 (level 2 profile), and almost
> finished the h245 negotiators.> >> I > >> have been able to establish a
> videocall between an asterisk box and a> >> motorola phone, but i'm having
> problems with the negotiations on> >>  other phones. Are any one of you going
> to start an open source> >> proyect? > >> > >>  Greetings> >>      Sergio> >>
> > >> > >> > >> ________________________________> >> > >> Be one of the first
> to try Windows Live Mail.> >> > >
>
<http://ideas.live.com/programpage.aspx?versionId=5d21c51a-b161-4314-9b0e-4911fb2b2e6d>>
> >> > >> > >
>
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