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Hi,<br>
<br>
Sergio use h263p (RFC2429) to pack the video stream, but the video is
in h263 (not with h263+ codec).<br>
H263+ adds some annexes to improve the video quality, and cannoy be
supported by some 3G video phones.<br>
<br>
If you want to use h263p (RFC2429) to establish SIP video calls, you
need to disable the annexes and configure the SIP phone to use h263
standard (not all the phone will allow to configure that).<br>
<br>
In the other cases, you should use the video transcoder to conciliate
the 2 video codecs (h263p for 3G/h324m side and h263, h263p(real, not
limited as for 3G) or h264 for the SIP phone).<br>
<br>
Regards,<br>
<br>
<br>
Borja from i6net <br>
<br>
<br>
<br>
<br>
Le 17/05/2010 05:06, Ethan Liu a écrit :
<blockquote cite="mid:009901caf56d$f4eb1d50$dec157f0$@com" type="cite">
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<p class="MsoNormal"><span
style="font-family: "Arial Unicode MS","sans-serif";" lang="EN-US">Hi
Sergio,<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family: "Arial Unicode MS","sans-serif";" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-family: "Arial Unicode MS","sans-serif";" lang="EN-US">I'm
sorry to trouble you, but I have some question about h324m protocol.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family: "Arial Unicode MS","sans-serif";" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-family: "Arial Unicode MS","sans-serif";" lang="EN-US">The
SIP phone cannot get video when I use h.263 codec bridged SIP and 3G
calls.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family: "Arial Unicode MS","sans-serif";" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-family: "Arial Unicode MS","sans-serif";" lang="EN-US">And
I checked the problem that it seems </span><span
style="font-family: "Arial Unicode MS","sans-serif";">“<span
lang="EN-US">create_ast_frame</span>”<span lang="EN-US"> function only
use h.263plus
codec by default.<o:p></o:p></span></span></p>
<p class="MsoNormal"><span
style="font-family: "Arial Unicode MS","sans-serif";" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-family: "Arial Unicode MS","sans-serif";">“<span
lang="EN-US">send->subclass = AST_FORMAT_H263_PLUS | mark;</span>”<span
lang="EN-US"><o:p></o:p></span></span></p>
<p class="MsoNormal"><span
style="font-family: "Arial Unicode MS","sans-serif";" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-family: "Arial Unicode MS","sans-serif";" lang="EN-US">I
try modify that codec to h.263 only, but it</span><span
style="font-family: "Arial Unicode MS","sans-serif";">’<span
lang="EN-US">s failed. There are two
question:<o:p></o:p></span></span></p>
<p class="MsoNormal"><span
style="font-family: "Arial Unicode MS","sans-serif";" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoListParagraph"
style="margin-left: 18pt; text-indent: -18pt;"><!--[if !supportLists]--><span
style="font-family: "Arial Unicode MS","sans-serif";" lang="EN-US"><span
style="">1.<span
style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal; -x-system-font: none;">
</span></span></span><!--[endif]--><span
style="font-family: "Arial Unicode MS","sans-serif";" lang="EN-US">Can
I use
libh324m negotiate codec with 3G phone use h.263 only? <o:p></o:p></span></p>
<p class="MsoListParagraph"
style="margin-left: 18pt; text-indent: 0cm;"><span
style="font-family: "Arial Unicode MS","sans-serif";" lang="EN-US">I
saw that it
seems can negotiate h.263 or h.263 version 3(h.263++/h.263 2000), but
how to
negotiate h.263 1996 or h.263 plus(h.263 1998)?<o:p></o:p></span></p>
<p class="MsoListParagraph"
style="margin-left: 18pt; text-indent: -18pt;"><!--[if !supportLists]--><span
style="font-family: "Arial Unicode MS","sans-serif";" lang="EN-US"><span
style="">2.<span
style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal; -x-system-font: none;">
</span></span></span><!--[endif]--><span
style="font-family: "Arial Unicode MS","sans-serif";" lang="EN-US">How
can I translate
from h.263 plus to h.263 ? it seems only has different heard, right?<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family: "Arial Unicode MS","sans-serif";" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-family: "Arial Unicode MS","sans-serif";" lang="EN-US">Wait
for
your suggestion. Thank you.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family: "Arial Unicode MS","sans-serif";" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-family: "Arial Unicode MS","sans-serif";" lang="EN-US">Ethan<o:p></o:p></span></p>
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<br>
<pre class="moz-signature" cols="72">--
Borja Sixto, Research & Innovation - <a class="moz-txt-link-freetext" href="http://www.i6net.com">http://www.i6net.com</a>
Office: +34 911877477 | Gtalk: bsixto | Skype: borja.sixto</pre>
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