[asterisk-users] Question on ExternalMedia and the codec

Dan Cropp
Tue, 12 Oct 2021 20:54:00 -0000

We tell asterisk to use the slin format for ExternalMedia.  However, the unicast
channel is selecting ulaw formatand the RTP data is indicating it's ulaw
format.

Anyone know why ulaw format would be on chosen?


[10/12 16:13:39.396] DEBUG[1665] http.c: HTTP Request URI is
/ari/channels/externalMedia?app=a2519b4b-4d90-4d18-906b-717d02f8d569&external_host=192.168.32.148:8080&format=slin
[10/12 16:13:39.396] DEBUG[1665] http.c: match request
[ari/channels/externalMedia] with handler [static] len 6
[10/12 16:13:39.396] DEBUG[1665] http.c: match request
[ari/channels/externalMedia] with handler [ari] len 3
[10/12 16:13:39.396] DEBUG[1665] http.c: Match made with [ari]
[10/12 16:13:39.396] DEBUG[1665] res_ari.c: Finding handler for
channels/externalMedia
[10/12 16:13:39.396] DEBUG[1665] res_ari.c:   Finding handler for channels
[10/12 16:13:39.396] DEBUG[1665] res_ari.c:         Checking ari deviceStates:
Didn't match channels
[10/12 16:13:39.396] DEBUG[1665] res_ari.c:         Checking ari applications:
Didn't match channels
[10/12 16:13:39.396] DEBUG[1665] res_ari.c:         Checking ari channels:
Explicit match with channels
[10/12 16:13:39.396] DEBUG[1665] res_ari.c:   Finding handler for externalMedia
[10/12 16:13:39.396] DEBUG[1665] res_ari.c:         Checking channels create:
Didn't match externalMedia
[10/12 16:13:39.396] DEBUG[1665] res_ari.c:         Checking channels channelId:
Matched wildcard.
[10/12 16:13:39.396] DEBUG[1665] res_ari.c:         Checking channels
externalMedia:  Explicit match with externalMedia
[10/12 16:13:39.396] DEBUG[1665] acl.c: For destination
'192.168.32.148', our source address is '192.168.33.34'.
[10/12 16:13:39.396] DEBUG[1665] rtp_engine.c: Using engine 'asterisk'
for RTP instance '0x7fef60018320'
[10/12 16:13:39.396] DEBUG[1665] res_rtp_asterisk.c: (0x7fef60018320) RTP
allocated port 12226
[10/12 16:13:39.396] DEBUG[1665] res_rtp_asterisk.c: (0x7fef60018320) ICE
creating session 192.168.33.34:12226 (12226)
[10/12 16:13:39.396] DEBUG[1665] res_rtp_asterisk.c: (0x7fef60018320) ICE create
[10/12 16:13:39.396] DEBUG[1665] res_rtp_asterisk.c: (0x7fef60018320) ICE add
system candidates
[10/12 16:13:39.396] DEBUG[1665] res_rtp_asterisk.c: (0x7fef60018320) ICE add
candidate: 192.168.33.34:12226, 2130706431
[10/12 16:13:39.396] DEBUG[1665] rtp_engine.c: RTP instance
'0x7fef60018320' is setup and ready to go
[10/12 16:13:39.396] DEBUG[1665] channel_internal_api.c:  <initializing>:
Formats: (none)
[10/12 16:13:39.396] DEBUG[1665] channel_internal_api.c:  Channel is being
initialized or destroyed
[10/12 16:13:39.396] DEBUG[1665] stasis.c: Creating topic. name:
channel:1634055219.4, detail:
[10/12 16:13:39.396] DEBUG[1665] stasis.c: Topic 'channel:1634055219.4':
0x7fef6008d170 created
[10/12 16:13:39.396] DEBUG[1665] channel.c: Channel 0x7fef6008a910
'UnicastRTP/192.168.32.148:8080-0x7fef60018320' allocated
[10/12 16:13:39.396] DEBUG[1665] acl.c: For destination
'192.168.32.148', our source address is '192.168.33.34'.
[10/12 16:13:39.396] DEBUG[1665] channel_internal_api.c:
UnicastRTP/192.168.32.148:8080-0x7fef60018320: Formats: (ulaw)
[10/12 16:13:39.396] DEBUG[1665] channel_internal_api.c:  New topology set
[10/12 16:13:39.396] DEBUG[1665] res_stasis.c:
a2519b4b-4d90-4d18-906b-717d02f8d569: Subscribing to 1634055219.4
[10/12 16:13:39.396] DEBUG[1665] stasis/app.c: Channel '1634055219.4' is
1 interested in a2519b4b-4d90-4d18-906b-717d02f8d569
[10/12 16:13:39.396] DEBUG[1665] http.c: HTTP keeping session open.
status_code:200
[10/12 16:13:39.396] DEBUG[1666] stasis/app.c: Channel '1634055219.4' is
2 interested in a2519b4b-4d90-4d18-906b-717d02f8d569

Have a good day!
Dan

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