by the way, what is the latency in ms to determine if a packet is late?<div><br></div><div><br></div><div>Our ptime is 10ms, and the sender always sends packets in 8-12ms.</div><div><br></div><div>And I did use wireshark to capture packets on freeswitch server, no lost packet is found before reaching freeswitch.</div>
<div><br></div><div>When our ptime is 20ms, it gets better, but still has CN. </div><div><br></div><div>When we are using proxy/proxy media, every thing works great.</div><div><br></div><div>when sample rate is 16000, the quality of call is worst. 8000 gets better.</div>
<div><br></div><div><br></div><div>Any other suggestions?<br><br><div class="gmail_quote">On Wed, Feb 6, 2013 at 12:32 AM, Xijing Dai <span dir="ltr"><<a href="mailto:dxj19831029@gmail.com" target="_blank">dxj19831029@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif">I see.</span><div><span style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif"><br>
</span></div><div><span style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif"> </span><div><span style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif">I did set it suppress_cng=true, and it did not help. No difference at all.</span><div>
<font color="#222222" face="arial, sans-serif"><br></font></div><div><font color="#222222" face="arial, sans-serif">This happens inside LAN.</font></div><div><br></div><div><font color="#222222" face="arial, sans-serif">When talking about the jitter buffer, we want to enable it on client, and disable it inside freeswitch. </font></div>
<div><font color="#222222" face="arial, sans-serif">Therefore, in this case, should freeswitch do nothing?</font></div><div><font color="#222222" face="arial, sans-serif"><br></font></div><div><font color="#222222" face="arial, sans-serif"><br>
</font></div><div><font color="#222222" face="arial, sans-serif">Cheers</font></div><div><div class="h5"><div><font color="#222222" face="arial, sans-serif"><br></font></div><div><font color="#222222" face="arial, sans-serif"><br>
</font></div>
<div><font color="#222222" face="arial, sans-serif"><br></font><br><div class="gmail_quote">On Tue, Feb 5, 2013 at 11:35 PM, Anthony Minessale <span dir="ltr"><<a href="mailto:anthony.minessale@gmail.com" target="_blank">anthony.minessale@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Don't negotiate CNG in the SDP and it won't use it or disable it with suppress_cng=true in your channel or global vars.<div>
<br></div></div><div class="gmail_extra"><div><div><br><br><div class="gmail_quote">On Tue, Feb 5, 2013 at 4:32 AM, Steven Ayre <span dir="ltr"><<a href="mailto:steveayre@gmail.com" target="_blank">steveayre@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Because if a RTP packet is due and hasn't arrived yet you need something to play. Audio isn't like TCP where you dropped packets can be retransmitted, if it hasn't arrived by the time you want to play it it's too late and you have to play silence to handle it.<div>
<br></div><div>Your audio problems are more likely due to packet loss or jitter which is why the RTP packet is overdue, not the CNG itself.</div><div><br></div><div>It jitter's the problem enabling the jitterbuffer might help (at the expense of increased lag). If loss is the problem there's no way to handle that except as silence for the missing interval, you need to fix whatever is causing the loss.</div>
<div><br></div><div>-Steve</div><div><br></div><div><br><div class="gmail_quote"><div><div>On 5 February 2013 10:23, Xijing Dai <span dir="ltr"><<a href="mailto:dxj19831029@gmail.com" target="_blank">dxj19831029@gmail.com</a>></span> wrote:<br>
</div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div>Hey all,<div><br></div><div><br></div><div>Inside code</div><div><br></div><div>switch_rtp.c file:</div>
<div><br></div>
<blockquote> static int rtp_common_read(switch_rtp_t *rtp_session, switch_payload_t *payload_type, switch_frame_flag_t *flags, switch_io_flag_t io_flags)<br>
................<br> if (check || (bytes && !switch_test_flag(rtp_session, SWITCH_RTP_FLAG_USE_TIMER))) {<br><span style="white-space:pre-wrap"> </span>if (!bytes && switch_test_flag(rtp_session, SWITCH_RTP_FLAG_USE_TIMER)) {<span style="white-space:pre-wrap"> </span>/* We're late! We're Late! */<br>
<span style="white-space:pre-wrap"> </span>if (!switch_test_flag(rtp_session, SWITCH_RTP_FLAG_NOBLOCK) && status == SWITCH_STATUS_BREAK) {<br><span style="white-space:pre-wrap"> </span>switch_cond_next();<br>
<span style="white-space:pre-wrap"> </span>continue;<br><span style="white-space:pre-wrap"> </span>}<br><span style="white-space:pre-wrap"> <br></span><span style="white-space:pre-wrap"> </span>return_cng_frame(); <------- this lane to return cng frame if late.<br>
<span style="white-space:pre-wrap"> </span>}<br><span style="white-space:pre-wrap"> </span>}<br><br><br></blockquote>Could someone explain why we want to return cng frame when package is late? this is caused for me to hear very bad noise audio.<div>
<br></div><div>Can I disable return CNG frame?<br><div><br></div><div><br></div><div>Cheers<br><blockquote><br><br><br><br></blockquote></div></div>
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