[Asterisk-video] 2 newbie questions

Ivo Zivkov asterisk at avmedia.org
Sun Nov 11 15:58:58 CST 2007 

Sorry if this has been covered. I am just looking for a directions on 
how to approach this, not an actual solution.

2 questions:

1. What do I use to transcode mp3 stream to a codec asterisk understands?
2. Even if the codec of the file matches, still cannot hear it. what I 
am doing wrong?

I am using live555MediaServer. In the first case, obviously codec 
negotiation fails, as can be seen from the asterisk output below. I 
assume I need some transcoding or translating module. What is it, and 
how do I install it.

Here is my dailplan entry:

exten => 900,2,rtsp(rtsp://192.168.1.240/lili.mp3)

Here is the asterisk output:

[Nov 11 16:40:17] WARNING[12875]: app_rtsp.c:1166 rtsp_play: responseLen 
<163>
[Nov 11 16:40:17] WARNING[12875]: app_rtsp.c:749 CreateSDP: -line [v=0]
[Nov 11 16:40:17] WARNING[12875]: app_rtsp.c:749 CreateSDP: -line [o=- 
1194821877196139 1 IN IP4 192.168.1.240]
[Nov 11 16:40:17] WARNING[12875]: app_rtsp.c:749 CreateSDP: -line 
[s=MPEG-1 or 2 Audio, streamed by the LIVE555 Media Server]
[Nov 11 16:40:17] WARNING[12875]: app_rtsp.c:749 CreateSDP: -line 
[i=lili.mp3]
[Nov 11 16:40:17] WARNING[12875]: app_rtsp.c:749 CreateSDP: -line [t=0 0]
[Nov 11 16:40:17] WARNING[12875]: app_rtsp.c:749 CreateSDP: -line 
[a=tool:LIVE555 Streaming Media v2007.07.01]
[Nov 11 16:40:17] WARNING[12875]: app_rtsp.c:749 CreateSDP: -line 
[a=type:broadcast]
[Nov 11 16:40:17] WARNING[12875]: app_rtsp.c:749 CreateSDP: -line 
[a=control:*]
[Nov 11 16:40:17] WARNING[12875]: app_rtsp.c:749 CreateSDP: -line 
[a=range:npt=0-190.351]
[Nov 11 16:40:17] WARNING[12875]: app_rtsp.c:749 CreateSDP: -line 
[a=x-qt-text-nam:MPEG-1 or 2 Audio, streamed by the LIVE555 Media Server]
[Nov 11 16:40:17] WARNING[12875]: app_rtsp.c:749 CreateSDP: -line 
[a=x-qt-text-inf:lili.mp3]
[Nov 11 16:40:17] WARNING[12875]: app_rtsp.c:749 CreateSDP: -line 
[m=audio 0 RTP/AVP 14]
[Nov 11 16:40:17] WARNING[12875]: app_rtsp.c:694 CreateMedia: -creating 
media [1,m=audio 0 RTP/AVP 14]
[Nov 11 16:40:17] WARNING[12875]: app_rtsp.c:749 CreateSDP: -line [c=IN 
IP4 0.0.0.0]
[Nov 11 16:40:17] WARNING[12875]: app_rtsp.c:749 CreateSDP: -line 
[a=control:track1]
[Nov 11 16:40:17] WARNING[12875]: app_rtsp.c:749 CreateSDP: -line [.351]
[Nov 11 16:40:17] WARNING[12875]: app_rtsp.c:749 CreateSDP: -line 
[a=x-qt-text-nam:MPEG-1 or 2 Audio, streamed by the LIVE555 Media Server]
[Nov 11 16:40:17] WARNING[12875]: app_rtsp.c:749 CreateSDP: -line 
[a=x-qt-text-inf:lili.mp3]
[Nov 11 16:40:17] WARNING[12875]: app_rtsp.c:749 CreateSDP: -line 
[m=audio 0 RTP/AVP 14]
[Nov 11 16:40:17] WARNING[12875]: app_rtsp.c:694 CreateMedia: -creating 
media [1,m=audio 0 RTP/AVP 14]
[Nov 11 16:40:17] WARNING[12875]: app_rtsp.c:749 CreateSDP: -line [c=IN 
IP4 0.0.0.0]
[Nov 11 16:40:17] WARNING[12875]: app_rtsp.c:749 CreateSDP: -line 
[a=control:track1]
[Nov 11 16:40:17] WARNING[12875]: app_rtsp.c:1203 rtsp_play: INZ: 
chan->nativeformats [68] [unknown]
[Nov 11 16:40:17] WARNING[12875]: app_rtsp.c:1211 rtsp_play: -audio 
[0,-1,track1] name [unknown]
[Nov 11 16:40:17] WARNING[12875]: app_rtsp.c:1248 rtsp_play: INZ: 
app_rtsp, setting audioFormat <0>, videoFormat <0>
[Nov 11 16:40:17] WARNING[12875]: channel.c:2991 set_format: INZ: Unable 
to find a codec translation path from unknown to unknown, fmt <0>
[Nov 11 16:40:17] ERROR[12875]: app_rtsp.c:1262 rtsp_play: No media found







===================================
For the secind question, I am trying to play ulaw-encoded wav file, I am 
still not hearing anything. Here is the asterisk output:

[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:1034 rtsp_play: >rtsp play
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:421 RtspPlayerDescribe: 
 >DESCRIBE [/M1F1-mulaw-AFsp.wav]
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:446 RtspPlayerDescribe: 
<DESCRIBE [/M1F1-mulaw-AFsp.wav]
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:1075 rtsp_play: -rtsp play loop
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:1137 rtsp_play: -Receiving 
describe
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:953 RecvResponse: 
RecvResponse: before recv, <16383> bytes
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:955 RecvResponse: 
RecvResponse: after recv, got <600>
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:1151 rtsp_play: 
RecvResponse len <174>
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:1166 rtsp_play: responseLen 
<174>
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:749 CreateSDP: -line [v=0]
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:749 CreateSDP: -line [o=- 
1194822719406021 1 IN IP4 192.168.1.240]
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:749 CreateSDP: -line [s=WAV 
Audio Stream, streamed by the LIVE555 Media Server]
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:749 CreateSDP: -line 
[i=M1F1-mulaw-AFsp.wav]
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:749 CreateSDP: -line [t=0 0]
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:749 CreateSDP: -line 
[a=tool:LIVE555 Streaming Media v2007.07.01]
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:749 CreateSDP: -line 
[a=type:broadcast]
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:749 CreateSDP: -line 
[a=control:*]
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:749 CreateSDP: -line 
[a=range:npt=0-2.947]
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:749 CreateSDP: -line 
[a=x-qt-text-nam:WAV Audio Stream, streamed by the LIVE555 Media Server]
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:749 CreateSDP: -line 
[a=x-qt-text-inf:M1F1-mulaw-AFsp.wav]
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:749 CreateSDP: -line 
[m=audio 0 RTP/AVP 96]
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:694 CreateMedia: -creating 
media [1,m=audio 0 RTP/AVP 96]
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:749 CreateSDP: -line [c=IN 
IP4 0.0.0.0]
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:749 CreateSDP: -line 
[a=rtpmap:96 PCMU/8000/2]
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:749 CreateSDP: -line 
[a=control:track1]
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:749 CreateSDP: -line [V 
Audio Stream, streamed by the LIVE555 Media Server]
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:749 CreateSDP: -line 
[a=x-qt-text-inf:M1F1-mulaw-AFsp.wav]
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:749 CreateSDP: -line 
[m=audio 0 RTP/AVP 96]
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:694 CreateMedia: -creating 
media [1,m=audio 0 RTP/AVP 96]
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:749 CreateSDP: -line [c=IN 
IP4 0.0.0.0]
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:749 CreateSDP: -line 
[a=rtpmap:96 PCMU/8000/2]
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:749 CreateSDP: -line 
[a=control:track1]
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:1203 rtsp_play: INZ: 
chan->nativeformats [4] [ulaw]
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:1211 rtsp_play: -audio 
[4,96,track1] name [ulaw]
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:1248 rtsp_play: INZ: 
app_rtsp, setting audioFormat <4>, videoFormat <0>
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:457 RtspPlayerSetupAudio: 
-SETUP AUDIO [track1]
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:1270 rtsp_play: -Recv audio 
response
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:953 RecvResponse: 
RecvResponse: before recv, <16383> bytes
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:955 RecvResponse: 
RecvResponse: after recv, got <197>
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:561 RtspPlayerPlay: -PLAY 
[/M1F1-mulaw-AFsp.wav]
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:953 RecvResponse: 
RecvResponse: before recv, <16383> bytes
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:955 RecvResponse: 
RecvResponse: after recv, got <188>
[Nov 11 16:54:20] ERROR[13095]: app_rtsp.c:1376 rtsp_play: -Started 
playback [0]
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:1087 rtsp_play: Played <0>
[Nov 11 16:54:20] WARNING[13095]: app_rtsp.c:1093 rtsp_play: Playback 
finished


Your help is appreciated.

Ivo

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