[Asterisk-video] can't hear amr audio

[Andrew Buchanan]

Hi,

 

My camera (a Vivotek PZ7152) is set to AMR audio and when app_rtsp
connects it correctly identifies an audio track containing amr audio
AMR/8000, but I get no audio, only video.  I would appreciate some help
or suggestions to get audio working.

 

------------------------

I compiled asterisk using the instructions to enable amr audio

http://sip.fontventa.com/svn/asterisk/amr/README

 

and I added the octet-aligned setting, which according to the sdp from
the camera is the correct setting.

[amr]
octet-aligned=1
 
------------------------
 
I've done some debugging in app_rtsp.c and found that:
 
This comparision 'if (sdp->audio->formats[i]->format &
chan->nativeformats)' in app_rtsp.c fails.
 
the value of format is 0x00002000
the value of nativeformats is 0x00580004
 
I also get this warning
[Jul 11 16:36:45] WARNING[31498]: channel.c:2800 set_format: Unable to
find a codec translation path from 0x580004 (ulaw|h263|h263p) to 0x0
(nothing)
 
I'm not sure why only ulaw,h263,h263p show up, but they are the only
protocols I have enabled in xlite, so that could be it, but the 0x0
(nothing) I don't know.
 
Some debug code (my app_rtsp line #'s might be off a bit as I added some
debug statements)
 
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:421 RtspPlayerDescribe:
>DESCRIBE [/live2.sdp]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:442 RtspPlayerDescribe:
<DESCRIBE [/live2.sdp]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:1081 rtsp_play: -rtsp play
loop [0]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:1190 rtsp_play: -Receiving
describe
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:744 CreateSDP: -line [v=0]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:744 CreateSDP: -line [o=RTSP
1215786675 889 IN IP4 0.0.0.0]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:744 CreateSDP: -line [s=RTSP
server]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:744 CreateSDP: -line [c=IN
IP4 0.0.0.0]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:744 CreateSDP: -line [t=0 0]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:744 CreateSDP: -line
[a=charset:Shift_JIS]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:744 CreateSDP: -line
[a=range:npt=0-]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:744 CreateSDP: -line
[a=control:*]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:744 CreateSDP: -line
[a=etag:1234567890]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:744 CreateSDP: -line [m=video
0 RTP/AVP 96]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:689 CreateMedia: -creating
media [1,m=video 0 RTP/AVP 96]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:744 CreateSDP: -line [b=AS:0]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:744 CreateSDP: -line
[a=rtpmap:96 MP4V-ES/30000]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:744 CreateSDP: -line
[a=control:trackID=2]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:744 CreateSDP: -line
[a=fmtp:96
profile-level-id=3;config=000001B003000001B2464D5F5047204D6F6465000001B5
09000001000000012000C48881F450A041E1463F;decode_buf=76800]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:744 CreateSDP: -line [m=audio
0 RTP/AVP 97]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:689 CreateMedia: -creating
media [1,m=audio 0 RTP/AVP 97]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:744 CreateSDP: -line
[b=AS:13]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:744 CreateSDP: -line
[a=rtpmap:97 AMR/8000]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:744 CreateSDP: -line
[a=control:trackID=4]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:744 CreateSDP: -line
[a=maxptime:200]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:744 CreateSDP: -line
[a=fmtp:97 decode_buf=400;octet-align=1]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:744 CreateSDP: -line
[1F450A041E1463F;decode_buf=76800]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:744 CreateSDP: -line [m=audio
0 RTP/AVP 97]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:689 CreateMedia: -creating
media [1,m=audio 0 RTP/AVP 97]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:744 CreateSDP: -line
[b=AS:13]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:744 CreateSDP: -line
[a=rtpmap:97 AMR/8000]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:744 CreateSDP: -line
[a=control:trackID=4]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:744 CreateSDP: -line
[a=maxptime:200]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:744 CreateSDP: -line
[a=fmtp:97 decode_buf=400;octet-align=1]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:1249 rtsp_play: -audio
[8192,97,trackID=4]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:1264 rtsp_play:
!(sdp->audio->formats[i]->format & chan->nativeformats) fmt 00002000
nfmt 00580004 -audio [97,trackID=4]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:1274 rtsp_play: -video
[4194304,96,trackID=2]
[Jul 11 16:36:45] WARNING[31498]: channel.c:2800 set_format: Unable to
find a codec translation path from 0x580004 (ulaw|h263|h263p) to 0x0
(nothing)
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:505 RtspPlayerSetupVideo:
-SETUP VIDEO [trackID=2]
[Jul 11 16:36:45] DEBUG[31498]: app_rtsp.c:557 RtspPlayerPlay: -PLAY
[/live2.sdp]
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