[Freeswitch-users] Opus PLC issue - can this be a bug?

[Stanislav Sinyagin]

here's a great deal of advice on how to simulate a random packet drop:
http://stackoverflow.com/questions/614795/simulate-delayed-and-dropped-packets-on-linux



On Sun, Oct 4, 2015 at 11:19 PM, Thomas <lists at virtues.net> wrote:

> Just retested with latest master, still there.
>
> It also sometimes includes this:
>
> switch_core_media.c:2421 alternate payload received (received 72,
> expecting 111)
> switch_core_media.c:2444 Could not change to payload type 72, ignoring...
>
> or this
>
> mod_opus.c:346 OPUS_INVALID_PACKET ! nb_opus_frames: -4
> mod_opus.c:836 Decoder Error: corrupted stream fs:4080 plc:false!
> switch_core_io.c:1244 Codec OPUS (STANDARD) decoder error!
>
> When I test through echo without any decoding, it sounds surprisingly good
> for 5% packet loss. So it seems like an FS issue. It's quite strange
> though. Will file a jira.
>
>
>
> On 04.10.2015 16:37, Brian West wrote:
>
> Have you tried with code from today?  we had a regression I think that was
> resolved late yesterday.
>
> On Sun, Oct 4, 2015 at 1:41 PM, Thomas <lists at virtues.net> wrote:
>
>> Hello list,
>>
>> on a connection with an unfortunate amount of packet loss, I'm getting a
>> lot of these:
>>
>> mod_opus.c:289 FEC in CELT_ONLY mode ?!
>>
>> ... with the occasional ...
>>
>> mod_opus.c:801 Decoder Error: corrupted stream fs:4080 plc:false!
>> switch_core_io.c:622 Codec RAW Signed Linear (16 bit) decoder error! [9]
>>
>> ... and ...
>>
>> switch_rtp.c:875 Invalid STUN/ICE packet received 493 bytes
>>
>> That's accompanied by robotic distortion.
>>
>> This sounds more like FS is receiving total junk rather than missing
>> packets, but surely there must be checksums
>> preventing errors inside these packets? Can this really be a bug in FS,
>> or do I need an exorcist for that internet
>> connection? :)
>>
>> Cheers!
>>
>> Thomas
>>
>> P.S.: Last nights master
>>
>>
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>
>
>
> --
>
> *Brian West*
> <brian at freeswitch.org>brian at freeswitch.org
>
>
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