Hello,<br><br>Anthony, could I ask your opinion, suggestions about removing inband dtmf from recorded files?<br>We checked how we could add this feature to record_session, but I have some questions<br><br>teletone dtmf detector needs more farme to detect dtmf, so I think we can't use media bug to replace the frames<br>
So we are thinking about to add a buffering and a dtmf detector <br>if dtmf has been detected, the farmes in the buffer should be overwritten with silence <br><br>It could goes to:<br>1) record_session app<br>2) file api (here buffering is implemented, but adding a detector to every file handle seems to be pretty ugly solution)<br>
3) a new file format, that makes another level buffering<br><br>Could you please let me know, if any of them could work? (I don't really like them)<br>or advise a working one?<br><br>Thanks in advance,<br>Tamas<br><br>
<br><div class="gmail_quote">On Fri, Jan 25, 2013 at 9:14 PM, Matt Broad <span dir="ltr"><<a href="mailto:matt@inveroak.com" target="_blank">matt@inveroak.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Thanks for the response Steve, is there a way of checking the dtmf type? I have tried looking at the Sofia profile but cannot see any details regarding dtmf.<span></span><div><br></div><div> I assume that this is determined by my sip provider?<div>
<br></div><div><br></div><div>Thanks</div><div>Matt<div><div class="h5"><br><br>On Friday, 25 January 2013, Steven Ayre wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
If you're using RFC2833 then that's not in the audio itself so won't be recorded. It is possible though that the caller is ending DTMF both in and out of band (which is fine as long as you only try to detect one or the other but not both).<div>
<br></div><div>-Steve</div><div><br></div><div><br></div><div><br><div>On 25 January 2013 14:27, Matt Broad <span dir="ltr"><<a>matt@inveroak.com</a>></span> wrote:<br>
<blockquote style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi,<div><br></div><div>sorry to interject into your message, but I was looking to do something similar to Tamas.</div>
<div><br></div><div>I have the need to prevent the DTMF from being recorded when using record_session. I am using RFC2833 (i think :) ), is this at all possible in the current Freeswitch build?</div><span><font color="#888888">
<div><br></div><div>Matt</div></font></span><div><div><div><br><br><div>On 21 January 2013 07:25, Tamas Jalsovszky <span dir="ltr"><<a>jalsot@gmail.com</a>></span> wrote:<br>
<blockquote style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hello Moy,<br><br>Inserting silence instead of the tone would be fine for me. I think the >= 50ms delay in recording is not an issue. I guess, removing from "live" streams would be harder and would introduce the delay you mentioned.<br>
So you have a plan to add such a functionality in the near future? That would be amazing :)<br><br>Regards,<br> Jalsot<br><br><div><div><div>On Mon, Jan 21, 2013 at 2:48 AM, Moises Silva <span dir="ltr"><<a>moises.silva@gmail.com</a>></span> wrote:<br>
</div></div><blockquote style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div><div dir="ltr"><div><div>On Sun, Jan 20, 2013 at 4:12 PM, Tamas Jalsovszky <span dir="ltr"><<a>jalsot@gmail.com</a>></span> wrote:<br>
</div></div><div><div><div><div>
<blockquote style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">Hello,<br><br>Is there a way to to remove inbad DTMF from the recorded wav file (conditionaly)?<br>
If not, how could be that done the easyiest way and a way it could get into FS git?<br><br>As FS has a great DTMF detector and it has probably all the stuff doing such a feature, I think it would be much better than using an external tool for removing DTMF from finished wav file - and it would consume more I/O probably.<br>
<br></blockquote><div><br></div></div></div><div>Removing it would not be that hard (ie, inserting silence instead). Removing it without leaving a trace any DTMF was ever there sounds a tad more difficult. If you're ok with inserting a silence instead of the tone, extending the record_session app to detect and remove DTMF is probably what I'd do.</div>
<div><br></div><div>It is also possible to create a new app that monitors the audio stream and silence the stream when DTMF is detected, but since the detection takes a few milliseconds (~50ms), there would be a bit of "bleeding" of DTMF in the signal, unless the new app also delays the signal by 50ms and then has a way to strip the DTMF completely.<br>
<br clear="all"><div><table style="width:486.3pt;border-collapse:collapse" width="648" border="0" cellpadding="0" cellspacing="0"><tbody><tr style="min-height:60.55pt"><td style="border-style:dotted none none;padding:1.45pt 5.75pt;min-height:60.55pt">
<p style="margin:0px;line-height:15px"><b><span style="font-size:8pt;line-height:12px;font-family:Arial,sans-serif;color:rgb(14,93,167)" lang="PT-BR">Moises Silva<br></span></b><b><i><span style="font-size:8pt;line-height:12px;font-family:Arial,sans-serif;color:rgb(128,176,214)" lang="EN-CA">Manager, Software Engineering</span></i></b><b><span style="font-size:8pt;line-height:12px;font-family:Arial,sans-serif;color:rgb(14,93,167)" lang="PT-BR"></span></b></p>
<p style="margin:0px;line-height:15px"><span style="font-size:8pt;line-height:12px;font-family:Arial,sans-serif;color:rgb(0,92,165)" lang="EN-CA"><a>msilva@sangoma.com</a></span></p>
<p style="margin:0px;line-height:15px"><span style="font-size:8pt;line-height:12px;font-family:Arial,sans-serif;color:rgb(0,92,165)" lang="EN-CA">Sangoma Technologies</span></p><p style="margin:0px;line-height:15px"><span style="font-size:8pt;line-height:12px;font-family:Arial,sans-serif;color:rgb(0,92,165)" lang="EN-CA">100 Renfrew Drive, Suite 100, Markham, ON L3R 9R6 Canada</span><span style="font-size:8pt;line-height:12px;font-family:Arial,sans-serif;color:rgb(255,192,0)" lang="EN-CA"></span></p>
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