Posted: Sun Jul 23, 2006 10:25 pm Post subject: [Asterisk-video] Asterisk and video contents for 3G network
Have any one test an Asterisk throw a 3G gateway (constuctor, reference) ?
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 ?
i6net
Selon Sergio Garc?a Murillo <Sergio.Garcia@ydilo.com>:
Quote:
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@lists.digium.com
[mailto:asterisk-video-bounces@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 ?
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?
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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.
Quote:
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
Quote:
i6net
Selon Sergio Garc?a Murillo <Sergio.Garcia@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@lists.digium.com
> [mailto:asterisk-video-bounces@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@ydilo.com
> To: asterisk-video@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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> it and kindly notify the sender by reply email.
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> that do not relate to the official business of Ydilo Advanced Voice
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You must not, directly or indirectly, use, disclose, distribute, print, or copy any
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