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Article ID: 000046683
Date de dernière modification: 12/08/2021
Access Level: Public

Obi VVX250 is presenting one-way audio issues only when is used OPUS codec.

A customer is claiming one-way audio problems when the VVX250/VVX450 with Obi firmware 6.4.1.1 use opus codec. The issue is not seen with G711U, the VVX phones are registered through Google Voice Platform.  After the call setup is completed 200ok/ACK I can see the next error “WriteRtp failed to start RX RTP packet processing” appears:
<7>[439.801142] RTP:Start->4a7d275a:19305(92 1);0;(nil);(nil):0:0;0(67)
<6>[439.801482] [DSPOBI] dspg_alloc_audio_stream_ex for ctx 0x480e6178. Fmt enc/dec=146/146. Raw 0.
<7>[439.801969] RTP_startEx: dspg_stream 0x68b74c allocated to RTP channel 0x480e6178
<6>[439.802287] RTP_setup_dspg_ctx: fmtIn 146 fmtOut 146 pt 111
<6>[439.802601] Done setting up RTP ctx: n_fmts=5 dpt=111 dtx=0 g726swap=0/0
<6>[439.803619] [DSPOBI] dspg_start_stream 0x68b74c ctx 0x480e6178
<6>[439.804507] +++ rtp_alloc_encoder: rtp 0x480e6178 tx_ptime_ts set to 960
<7>[440.457610] SRTCP:index=80000001
<7>[440.457817] RTCP:RxMuxPkt[56]=200<--4a7d275a:19305
<6>[440.457935] 440456 avm [5] [WriteRtp] failed to start RX RTP packet processing: -1
<6>[440.458034] 440456 avm [5] [writeRtpToStream] failed to write RTP data to handle 1, return: -1
<3>[440.458126] ERROR dspg_write_packet: avmWriteRtpToStream (pt 111) for AVM chan 1 returned: <1:fail>
<6>[440.465142] 440464 avm [5] [WriteRtp] failed to start RX RTP packet processing: -1
<6>[440.465292] 440464 avm [5] [writeRtpToStream] failed to write RTP data to handle 1, return: -1
<3>[440.465405] ERROR dspg_write_packet: avmWriteRtpToStream (pt 111) for AVM chan 1 returned: <1:fail>
<6>[440.499354] 440498 avm [5] [WriteRtp] failed to start RX RTP packet processing: -1
 
 
Call-flow failure with OPUS
                                                                      RTP Packets send/received with OPUS codec.
This is a bug and was solved by Dev in the Hot Fix release 6-4-2-11453.  The OPUS changes will become available  in the next firmware release 6.4.3.