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> From: sergio.garcia@fontventa.com<BR>> To: asterisk-video@lists.digium.com<BR>> Subject: Re: [Asterisk-video] H324M AMR audio working!!!<BR>> Date: Thu, 1 Mar 2007 16:58:56 +0100<BR>> <BR>> Hi Ratmin, it's good to see you're alive and well...<BR>> <BR>> > From: Ramtin Amin<BR>> > Sent: Thursday, March 01, 2007 3:48 PM<BR>> ><BR>> > The problem with bridging to SIP is bigger than you think<BR>> ><BR>> > My H324m stack is directly implemented into chan_zap, so I can place 3G<BR>> call with dial(zap/gv1/number) or I receive video call from a cellphone in<BR>> H263 mode.<BR>> <BR>> Good, and what it's the difference bridging the call to a sip channel?<BR>> Beside of that sepparating the stack from zap allows the use of other kind<BR>> of channels, like misdn as matteo did..<BR>> <BR>> > Also since I wrote codec_amr and format_amr, i gave chan_zap the amr<BR>> capability so the call is transcoded.<BR>> <BR>> Writting a codec_amr and format_amr would allow every channel to be able to<BR>> transcode them.<BR>> By the way, do you have them avaiable? Where can i donwload them? How can i<BR>> use your library with chan zap?<BR>> <BR>> > Currently when I bridge to SIP it works but there is a BIG problem, it's<BR>> the FPS that the softphone is sending.<BR>> > Basically, if the H263 video coded by the softphone is about 50kb/s its<BR>> fine. but if it's bigger (which is usually the case) then you loose frame.<BR>> > Also, the softphone is not usually capable of sending a SIP info as Video<BR>> Fast Update asking the softphone to reencode an I-frame.<BR>> > That's why I'm currenty working on the transcoding of H263 <> H263.<BR>> <BR>> Yes, you're rigth, most videophones doesn't allow you to adjust the bandwith<BR>> it's send, and if they send you more it wont work.<BR>> Transcoding can be done in to ways, the good one and the easy one. The easy<BR>> one is just use an h263 decoder and a h263 encoder, the good one,<BR>> as somone pointed in the past, would be reuse the motion vectors and some<BR>> other data from the decoder so the encoder doesn't need to calculate them<BR>> again. Which one are u implementing? And once again, where can i download<BR>> it?<BR>> <BR>> Greetings<BR>> Sergio García<BR>> http://sip.fontventa.com<BR>> <BR>> _______________________________________________<BR>> --Bandwidth and Colocation provided by Easynews.com --<BR>> <BR>> asterisk-video mailing list<BR>> To UNSUBSCRIBE or update options visit:<BR>> http://lists.digium.com/mailman/listinfo/asterisk-video<BR><br /><hr />Exprimez-vous en direct avec Windows Live Messenger ! <a href='http://imagine-msn.com/messenger/launch80/default.aspx?locale=fr-fr&source=joinmsncom/messenger' target='_new'>Windows Live Messenger !</a></body>
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