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

[Sergio García Murillo]

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.
>> 
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>> 
>> 
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You must not, directly or indirectly, use, disclose, distribute, print, or copy any 
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