[Freeswitch-users] Explanation of rtp_audio_in / out fields in XML CDR's?

Thu Nov 29 23:35:31 MSK 2012

Hi Michael &  Co,

Many thanks for the prompt & positive response! Yes, more than happy to collate feedback from the global team & update the wiki accordingly (I'd like to be able to document what the field values between the > < indicate as well as just explain the field names if possible...) +anything else I can do to to contribute to the project...?

Yes, now the wiki is back up I've managed to work out that cng_packet = comfort noise generation! Also from the wiki, possibly that the jb in rtp_audio_in_jb_packet_count & rtp_audio_in_largest_jb_size = jitter buffer? (apologies if everybody else already knows this!).

To provide the background to my original enquiry, I'm trying to identify if the rtp_audio_in_skip_packet_count in the following XML CDR extract is indicative of packet loss, or perhaps more accurately noticeable audio loss (as the packets haven't been lost, just ignored/"skipped"?: If anybody knows please speak up! 

    <rtp_audio_in_raw_bytes>1565066</rtp_audio_in_raw_bytes>
    <rtp_audio_in_media_bytes>1564856</rtp_audio_in_media_bytes>
    <rtp_audio_in_packet_count>9113</rtp_audio_in_packet_count>
    <rtp_audio_in_media_packet_count>9098</rtp_audio_in_media_packet_count>
    <rtp_audio_in_skip_packet_count>1609</rtp_audio_in_skip_packet_count>
    <rtp_audio_in_jb_packet_count>0</rtp_audio_in_jb_packet_count>
    <rtp_audio_in_dtmf_packet_count>0</rtp_audio_in_dtmf_packet_count>
    <rtp_audio_in_cng_packet_count>15</rtp_audio_in_cng_packet_count>
    <rtp_audio_in_flush_packet_count>0</rtp_audio_in_flush_packet_count>
    <rtp_audio_in_largest_jb_size>0</rtp_audio_in_largest_jb_size>

Thank you in anticipation of enlightenment!

#FreeSWITCH

Rgds, Mick
Tel/SMS. +44(0)7967 594432
Fax. +44(0)7053 452429

Email/IM. mickstevens at yahoo.com
Skype: mick_stevens
www.facebook.com/mickstevens
www.twitter.com/mickstevens

________________________________
 From: Michael Collins <msc at freeswitch.org>
To: FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org> 
Sent: Thursday, 29 November 2012, 19:14
Subject: Re: [Freeswitch-users] Explanation of rtp_audio_in / out fields in XML CDR's?

Mick,

This data is definitely not on the wiki - or anywhere else that I can see. I think we can crowdsource this to get the info collected and then add it to the mod_xml_curl wiki page. For the record, here's a quick dump of the fields that I took from an XML CDR:

    <rtp_audio_in_raw_bytes>10664</rtp_audio_in_raw_bytes>
    <rtp_audio_in_media_bytes>8772</rtp_audio_in_media_bytes>
    <rtp_audio_in_packet_count>62</rtp_audio_in_packet_count>
    <rtp_audio_in_media_packet_count>51</rtp_audio_in_media_packet_count>
    <rtp_audio_in_skip_packet_count>18</rtp_audio_in_skip_packet_count>
    <rtp_audio_in_jb_packet_count>0</rtp_audio_in_jb_packet_count>
    <rtp_audio_in_dtmf_packet_count>0</rtp_audio_in_dtmf_packet_count>
    <rtp_audio_in_cng_packet_count>0</rtp_audio_in_cng_packet_count>
    <rtp_audio_in_flush_packet_count>11</rtp_audio_in_flush_packet_count>
    <rtp_audio_in_largest_jb_size>0</rtp_audio_in_largest_jb_size>
    <rtp_audio_out_raw_bytes>11524</rtp_audio_out_raw_bytes>
    <rtp_audio_out_media_bytes>11524</rtp_audio_out_media_bytes>
    <rtp_audio_out_packet_count>67</rtp_audio_out_packet_count>
    <rtp_audio_out_media_packet_count>67</rtp_audio_out_media_packet_count>
    <rtp_audio_out_skip_packet_count>0</rtp_audio_out_skip_packet_count>
    <rtp_audio_out_dtmf_packet_count>0</rtp_audio_out_dtmf_packet_count>
    <rtp_audio_out_cng_packet_count>0</rtp_audio_out_cng_packet_count>

I think raw_bytes, media_bytes, packet_count, and media_packet_count are self-explanatory. I think cng_packet_count is probably self-explanatory too. My question on dtmf_packet_count would be whether it's only for RFC2833 packets (I suspect yes, but would like confirmation). 

If anyone knows these please reply to this email and Mick and I will get them documented on the wiki (right Mick? ;)

rtp_audio_in_skip_packet_count
rtp_audio_out_skip_packet_count
rtp_audio_in_jb_packet_count
rtp_audio_in_flush_packet_count
rtp_audio_in_largest_jb_size

Thanks all!

-MC

On Wed, Nov 28, 2012 at 3:28 AM, Mick Stevens <mickstevens at yahoo.com> wrote:

Hi Folks,
>
>
>I'm trying to use FS XML CDR's to diagnose historic audio problems. I think I can work out some of the rtp_audio_in / out fields (raw bytes & media bytes being nearly equal looks like a good sign) but am wondering about the skip, cng & flush fields for example?
>
>
>I have tried Googling this & can find evidence of other people having asked this question but not of the answer. I have also checked my FS 106 & Cookbook book's without success. The wiki appears to be down at the moment so my apologies if the answer lies there.
>
>
>I know how to do this in real time using wireshark etc but am interested in being able to do some analysis on historic problems reported by customers that aren't willing/able to replicate the problem in order for a protocol trace to be captured.
>
>
>Any help much appreciated!
> 
>Rgds, Mick
>Tel/SMS. +44(0)7967 594432
>Fax. +44(0)7053 452429
>
>Email/IM. mickstevens at yahoo.com
>Skype: mick_stevens
>www.facebook.com/mickstevens
>www.twitter.com/mickstevens
>
>_________________________________________________________________________
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>
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-- 
Michael S Collins
Twitter: @mercutioviz
http://www.FreeSWITCH.org
http://www.ClueCon.com
http://www.OSTAG.org

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