[asterisk-users] Unable to find codec translation path with video enabled

[Administrator TOOTAI]

Hello list,

I want to connect 2 sites both having asterisk installed (1.4 and 
13.16from Ubuntu 14.04). When calling from 13.16 to 1.4 (call to echo 
test which should show video) I get in logs

[2017-06-13 14:45:26] WARNING[17176][C-000003b0] channel.c: Unable to 
find a codec translation path: (h263|h264|h263p) -> (ulaw)
[2017-06-13 14:45:26] WARNING[17176][C-000003b0] channel.c: Unable to 
find a codec translation path: (ulaw) -> (h263|h264|h263p)
[2017-06-13 14:45:26] VERBOSE[17140][C-000003b0] app_dial.c: 
SIP/pubuntux-00001acb answered SIP/197-00001aca
[2017-06-13 14:45:26] VERBOSE[17140][C-000003b0] chan_sip.c: Audio is at 
27374
[2017-06-13 14:45:26] VERBOSE[17140][C-000003b0] chan_sip.c: Video is at 
XXX.XXX.XXX.XXX:28830
[2017-06-13 14:45:26] VERBOSE[17140][C-000003b0] chan_sip.c: Adding 
codec ulaw to SDP
[2017-06-13 14:45:26] VERBOSE[17140][C-000003b0] chan_sip.c: Adding 
video codec h263 to SDP
[2017-06-13 14:45:26] VERBOSE[17140][C-000003b0] chan_sip.c: Adding 
video codec h264 to SDP
[2017-06-13 14:45:26] VERBOSE[17140][C-000003b0] chan_sip.c: Adding 
non-codec 0x1 (telephone-event) to SDP

On the other end (1.4) I have

[Jun 13 14:45:24] VERBOSE[3671] logger.c: Capabilities: us - 0x3f1fff 
(g723|gsm|ulaw|alaw|g726|adpcm|slin|lpc10|g729|speex|ilbc|g726aal2|g722|jpeg|png|h261|h263|h263p|h264), 
peer - audio=0x38000c (ulaw|alaw|h263|h263p|h264)/video=0x380000 
(h263|h263p|h264), combined - 0x38000c (ulaw|alaw|h263|h263p|h264)
[Jun 13 14:45:24] VERBOSE[3671] logger.c: Non-codec capabilities (dtmf): 
us - 0x1 (telephone-event), peer - 0x1 (telephone-event), combined - 0x1 
(telephone-event)
[Jun 13 14:45:24] DEBUG[3671] chan_sip.c: Our T38 capability = (0), peer 
T38 capability (0), joint T38 capability (0)
[Jun 13 14:45:24] VERBOSE[3671] logger.c: Peer audio RTP is at port 
XXX.XXX.XXX.XXX:26748
[Jun 13 14:45:24] VERBOSE[3671] logger.c: Peer video RTP is at port 
XXX.XXX.XXX.XXX:24552

There is no video on the phone, only audio. Calling the local echo test 
is OK as well as calling another local videophone. Connecting the phone 
to the 1.4 asterisk and dialing echo test gave me also the video as well 
as calling the remote echo test (the one from 13.16). In all cases I 
have ulaw|h263 as codecs which is correct

As you can see from above logs, everything seems to be correct in both 
directions, audio as well as video. The only problem is the codec 
translation path between audio and video codecs in channel.c

Does anyone know what does this message mean or what could be the problem?

Thanks for any hint

-- 
Daniel