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

[Peter Steinbach]

Just for the records...

after extensive testing with Vestec support, we were still at the point 
that Freeswitch was sending empty RTP packets to the MRCP server.

After updating Freeswitch today to newest GIT (our previous GIT version 
was from 29-Jan-2012), recognition via MRCP worked successfully.


Thanks to all who supported on this issue.

Best regards
Peter



Am 04.03.2012 18:25, schrieb Peter Steinbach:
> 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!
>>
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>
>


-- 
With kind regards
Peter Steinbach

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