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

Thu Aug 24 07:29:41 MST 2006

Hi Philipe.
3gp and 3gp2 are NOT video codec. there are ISO format of media files like .avi 
In the 3gp file, you have the audio part that is either h263 or AAC, and the video part which is h263 or MPEG4 ( AVC)
so those information as the ISO describes it are writen inside the file.
Some phone don't have the capability of decoding MPEG4. so if you give them a 3GP file with MPEG4 codec for the video, they WONT play it...
the codec that could be used for the audio are AMR-NB (up to 12.2kb) mandatory, AMR-WB, g.723.1, AAC...

-- 
Amin Ramtin

> 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>> >> > >> > > --------------------------------------------------------------------------------------> >> This message and any files transmitted with it are confidential and> >> intended solely for the use of the individual or entity to whom they> >> are addressed. No confidentiality or privilege is waived or lost by> >> any wrong transmission.> >> If you have received this message in error, please immediately> >> destroy > >> it and kindly notify the sender by reply email.> >> You must not, directly or indirectly, use, disclose, distribute,> >> print, or copy any part of this message if you are not the intended> >> recipient. Opinions, conclusions and other information in this> >> message > >> that do not relate to the official business of Ydilo Advanced Voice> >> Solutions, S.A. shall be understood as neither given nor endorsed by> >> it.> >> > > --------------------------------------------------------------------------------------> >> > > > > > > _______________________________________________> > --Bandwidth and Colocation provided by Easynews.com --> > > > asterisk-video mailing list> > To UNSUBSCRIBE or update options visit:> >    http://lists.digium.com/mailman/listinfo/asterisk-video> > --------------------------------------------------------------------------------------> This message and any files transmitted with it are confidential and intended solely > for the use of the individual or entity to whom they are addressed. No confidentiality > or privilege is waived or lost by any wrong transmission. > If you have received this message in error, please immediately destroy it and kindly > notify the sender by reply email.> You must not, directly or indirectly, use, disclose, distribute, print, or copy any > part of this message if you are not the intended recipient. Opinions, conclusions and > other information in this message that do not relate to the official business of > Ydilo Advanced Voice Solutions, S.A. shall be understood as neither given nor endorsed by it. > --------------------------------------------------------------------------------------> _______________________________________________> --Bandwidth and Colocation provided by Easynews.com --> > asterisk-video mailing list> To UNSUBSCRIBE or update options visit:>    http://lists.digium.com/mailman/listinfo/asterisk-video> _______________________________________________> --Bandwidth and Colocation provided by Easynews.com --> > asterisk-video mailing list> To UNSUBSCRIBE or update options visit:>    http://lists.digium.com/mailman/listinfo/asterisk-video
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