[Freeswitch-users] Audio problems with unimrcp and Vestec ASR

Sun Mar 4 20:25:50 MSK 2012

Hello Peter,

thanks for the hint. It was using L16 codec, so I changed the avaliable 
codecs for the mrcp profile, so that it only accepts PCMA.
Now it negociates PCMA, see FS log:

2012-03-04 18:12:40.266537 [INFO] rtsp_client.c:929 () Receive RTSP 
Stream 192.168.178.221:54797 <-> 192.168.178.180:1554 [324 bytes]
RTSP/1.0 200 OK
CSeq: 1
Transport: RTP/AVP;unicast;client_port=4008-4009;server_port=5022-5023
Session: dafbbc3e7efb4474
Content-Type: application/sdp
Content-Length: 145
v=0
o=UniMRCPServer 0 0 IN IP4 192.168.178.180
s=-
c=IN IP4 192.168.178.180
t=0 0
m=audio 5022 RTP/AVP 8
a=rtpmap:8 PCMA/8000
a=recvonly

But the behaviour is the same. The RTP stream I grepped on the network 
seems always to be empty (silence).
All UDP RTP Packets sent from FS look like this (hex values):
80:08:00:08:00:00:05:00:f9:53:b5:e6:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5:d5

Best regards
Peter

Am 04.03.2012 15:17, schrieb Peter Olsson:
> What codec is used on the call leg? I tried some ASR (UniMRCP to Nuance) once, and I noticed that the audio passed to Nuance seemed to fail when using HD audio, when I did the same test with standard PCMA it worked. I never had the time to investigate any further though, since this was onle for a test, and nothing I needed to implement yet.
>
> /Peter
>
> ________________________________
> Från: freeswitch-users-bounces at lists.freeswitch.org [freeswitch-users-bounces at lists.freeswitch.org] för Peter Steinbach [lists at telefaks.de]
> Skickat: den 4 mars 2012 14:57
> Till: FreeSWITCH Users Help
> Ämne: [Freeswitch-users] Audio problems with unimrcp and Vestec ASR
>
> I have an Audio problem with unimrcp and Vestec ASR with mrcp v1.
>
> This seems to be a similar problem to thread: "ASR from Freeswitch to MS Speech Server [using MRCP Connector] - Audio Problem"
>
> What does work:
>
>    *   MRCP command are passed successsfull in both ways on port 1554 (vestec mrcp server)
>    *   Grammar is accepted and recognition is started
>    *   I can see RTP stream (wireshark) from FS port 400x to the mrcp server
>    *   Result (002 no-input-timeout) is sent back to Freeeswicth and is processed by FS successfully.
>
> What does NOT work:
>
>    *   RTP stream is always empty (silence), i grepped this on the network with ngrep, RTP data is empty, there is no change in the audio data when I speak.
>    *   so voice recognition will always time out (002 no-input-timeout)
>
> Here are my configs:
> unimrcp.conf.xml
> <configuration name="unimrcp.conf" description="UniMRCP Client">
>    <settings>
>      <param name="default-tts-profile" value="unimrcpserver-mrcp1"/>
>      <param name="default-asr-profile" value="unimrcpserver-mrcp1"/>
>      <param name="log-level" value="DEBUG"/>
>      <param name="enable-profile-events" value="false"/>
>
>      <param name="max-connection-count" value="100"/>
>      <param name="offer-new-connection" value="1"/>
>    </settings>
>    <profiles>
>      <X-PRE-PROCESS cmd="include" data="../mrcp_profiles/*.xml"/>
>    </profiles>
> </configuration>
>
> unimrcpserver-mrcp-v1.xml
> <include>
>    <!-- UniMRCP Server MRCPv1 -->
>    <profile name="unimrcpserver-mrcp1" version="1">
>      <param name="server-ip" value="192.168.178.180"/>
>      <param name="server-port" value="1554"/>
>      <param name="resource-location" value=""/>
>      <param name="speechsynth" value="speechsynthesizer"/>
>      <param name="speechrecog" value="speechrecognizer"/>
>      <param name="rtp-ip" value="auto"/>
>      <param name="rtp-port-min" value="4000"/>
>      <param name="rtp-port-max" value="5000"/>
>      <param name="codecs" value="PCMU PCMA L16/96/8000"/>
>      <synthparams>
>      </synthparams>
>      <!-- Add any default MRCP params for RECOGNIZE requests here -->
>      <recogparams>
>        <!--param name="start-input-timers" value="false"/-->
>      </recogparams>
>    </profile>
> </include>
>
> See logs here
> http://pastebin.freeswitch.org/18570
>
> Any help is appreciated.
>
> Best egards
> Peter
>
> --
> With kind regards
> Peter Steinbach
>
> Telefaks Services GmbH
> mailto:lists (att) telefaks.de
> Internet: www.telefaks.de<http://www.telefaks.de>
>
>
>
> !DSPAM:4f5373f932761937219840!
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> 
> 
>
> Official FreeSWITCH Sites
> http://www.freeswitch.org
> http://wiki.freeswitch.org
> http://www.cluecon.com
>
> FreeSWITCH-users mailing list
> FreeSWITCH-users at lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
> http://www.freeswitch.org
>

-- 
With kind regards
Peter Steinbach

Telefaks Services GmbH
mailto:lists (att) telefaks.de
Internet: www.telefaks.de