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[david.villasmil.work a...]

Hello all,

Wondering if anyone's seen this scenario:


With 15% packet loss, FEC enabled.


- sip -> pstn:
  -- We're seeing FEC out and in
  * client (OPUS) --> FS --> (PCMU/A) B-leg - Result: Choppy Audio
  * client (OPUS) <-- FS <-- (PCMU/A) B-leg - Result: Very good audio


  * client (OPUS) --> FS --> client (OPUS) - Result: Very good audio
  * client (OPUS) <-- FS <-- client (OPUS) - Result: Very good audio


It's like FS is ignoring the incoming FEC when transcoding.


I have a small jitterbuffer 20:100:20


Any ideas?




David Villasmilemail: david.villasmil.work@gmail.com (david.villasmil.work@gmail.com)
phone: +34669448337

[brian at freeswitch.com]

rtp_jitter_buffer_during_bridge=true, all the stuff in OPUS to process, manage and deal with FEC requires a jitter buffer to process it.

/b




On Wed, Jan 26, 2022 at 12:16 PM David Villasmil <david.villasmil.work@gmail.com (david.villasmil.work@gmail.com)> wrote:

[dragos at freeswitch.org]

Short answer: No.

If the client sends FEC packets AND there is packet loss AND FS finds in JB needed FEC for the missing seq, then it will use it.


It will show in CLI with  "opus_debug on" when it's doing it.




 


On Wed, Jan 26, 2022 at 7:58 PM David Villasmil <david.villasmil.work@gmail.com (david.villasmil.work@gmail.com)> wrote:

[david.villasmil.work a...]

looks like this was it, i had a very small jb configuredRegards,


David Villasmilemail: david.villasmil.work@gmail.com (david.villasmil.work@gmail.com)
phone: +34669448337






On Wed, Jan 26, 2022 at 6:33 PM Brian West <brian@freeswitch.com (brian@freeswitch.com)> wrote:

[brian at freeswitch.com]

If it's too small, it won't have enough data if a packet is lost in every case depending on latency and jitter.

On Wed, Jan 26, 2022 at 3:17 PM David Villasmil <david.villasmil.work@gmail.com (david.villasmil.work@gmail.com)> wrote: