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<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:
10.0pt;font-family:Arial;color:navy">One more update on this:<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:
10.0pt;font-family:Arial;color:navy"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:
10.0pt;font-family:Arial;color:navy">Moreover from the Initial 1 or 2 bytes of the payload, I am not able to find any valid ADU Descriptor Information.
<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:
10.0pt;font-family:Arial;color:navy">Is there any problem in sending that information from the server?
<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:
10.0pt;font-family:Arial;color:navy"><o:p> </o:p></span></font></p>
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<p class="MsoNormal"><b><font size="2" face="Tahoma"><span style="font-size:10.0pt;
font-family:Tahoma;font-weight:bold">From:</span></font></b><font size="2" face="Tahoma"><span style="font-size:10.0pt;font-family:Tahoma"> live-devel-bounces@ns.live555.com
[mailto:live-devel-bounces@ns.live555.com] <b><span style="font-weight:bold">On Behalf Of
</span></b>Sathish Kumar Manohar<br>
<b><span style="font-weight:bold">Sent:</span></b> Tuesday, November 10, 2009 11:35 AM<br>
<b><span style="font-weight:bold">To:</span></b> live-devel@lists.live555.com<br>
<b><span style="font-weight:bold">Subject:</span></b> [Live-devel] Queries related to Streaming MP3 clips using LIVE server.</span></font><o:p></o:p></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:
12.0pt"><o:p> </o:p></span></font></p>
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<p class="MsoNormal"><font size="2" color="black" face="Tahoma"><span style="font-size:
10.0pt;font-family:Tahoma;color:black">Hi Ross,</span></font><o:p></o:p></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:
12.0pt"> <o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="2" face="Tahoma"><span style="font-size:10.0pt;
font-family:Tahoma">I have some doubts regarding the RTP Payload for MP3.</span></font><o:p></o:p></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:
12.0pt"> <o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="2" face="Tahoma"><span style="font-size:10.0pt;
font-family:Tahoma">1) When I received the payload it's something like this </span></font><o:p></o:p></p>
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<p class="MsoNormal"><font size="2" face="Tahoma"><span style="font-size:10.0pt;
font-family:Tahoma"> 00 00 00 00 ff e3 e8 .....</span></font><o:p></o:p></p>
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<p class="MsoNormal"><font size="2" face="Tahoma"><span style="font-size:10.0pt;
font-family:Tahoma"> The valid data starts only after 4 bytes in all the cases. Why is that so?</span></font><o:p></o:p></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:
12.0pt"> <o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="2" face="Tahoma"><span style="font-size:10.0pt;
font-family:Tahoma">2) I tried streamed a clip with the following configuration</span></font><o:p></o:p></p>
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<p class="MsoNormal"><font size="2" face="Tahoma"><span style="font-size:10.0pt;
font-family:Tahoma"> <strong><b><font face="Tahoma"><span style="font-family:Tahoma"> MPEG 2.5 Layer III</span></font></b></strong></span></font><o:p></o:p></p>
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<p class="MsoNormal"><strong><b><font size="2" face="Tahoma"><span style="font-size:
10.0pt;font-family:Tahoma"> 160kbps , strereo, </span></font> </b></strong><o:p></o:p></p>
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<p class="MsoNormal"><strong><b><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> Sampling Rate: 8000 hz</span></font></b></strong> <o:p></o:p></p>
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12.0pt">
<o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:
12.0pt"> In this case, the size of the Computed frame is 1440. So single frame comes in 2 RTP packets.
<o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:
12.0pt"> The payload length in the first packet is 1436. The payload looked like this
<o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:
12.0pt"> 00 00 00 00 ff e3 e8 ....<o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:
12.0pt">
<o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:
12.0pt"> In the second RTP packet, the payload length was 12. And the 12 bytes looks like this
<o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:
12.0pt"> 00 00 05 98 00 00 00 00 00 00 00 00.<o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:
12.0pt"> <o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:
12.0pt"> Now I have to give 1440 bytes to my decoder. From the first packet the valid data starts after 4 bytes,<o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:
12.0pt"> So the valid data would be of size 1432 bytes. From the Second packet which 8 bytes should I give the<o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:
12.0pt"> decoder?. First 8 bytes or last 8 bytes.
<o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:
12.0pt">
<o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:
12.0pt">
<o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:
12.0pt"> I have attached the ethreal logs also. Kindly look into them and give your suggestions.<o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:
12.0pt"> Also let me know the general rule in handling the continuation frames, coming in multiple RTP Packets.<o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:
12.0pt"> <o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:
12.0pt"> <o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:
12.0pt"> <o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="2" face="Times New Roman"><span style="font-size:
10.0pt">Regards<br>
Sathish Kumar M<o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:
12.0pt"><o:p> </o:p></span></font></p>
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