The VideoLAN Forums

Posted: **28 Feb 2009 17:14**

Somewhat new with VLC. 'Holy Grail' is to stream live audio capture from a linux server via multicast to LAN clients, using Windows / MAC default players.

Current arrangement:
Server: i386 32 bit Ubuntu 8.10 Studio, PulseAudio streaming multicast from sound card input. all recent upgrades.
Client: AMD 64 dual core 2.4 Ghz 3 GB ram WinXP Media Center Edition with VLC 0.9.8a
SAP announcements enabled.

using the playlist, PulseAudio Stream is available in 'SAP'.

URI: (fails)
sdp://v=0
o=jalles 3444815591 0 IN IP4 192.168.2.42
s=PulseAudio RTP Stream on jalles-desktop
c=IN IP4 224.0.0.56
t=3444815591 0
a=recvonly
m=audio 46888 RTP/AVP 10
a=rtpmap:10 L16/44100/2
a=type:broadcast

message:

Code: Select all

main info: Running vlc with the default interface. Use 'cvlc' to use vlc without interface.
live555 error: no data received in 10s, aborting
main debug: starting new item
main debug: processing request item PulseAudio RTP Stream on jalles-desktop node SAP skip 0
main debug: resyncing on PulseAudio RTP Stream on jalles-desktop
main debug: PulseAudio RTP Stream on jalles-desktop is at 0
main debug: creating new input thread
main debug: Creating an input for 'PulseAudio RTP Stream on jalles-desktop'
main debug: thread started
main debug: waiting for thread initialization
main debug: thread 5344 (input) created at priority 1 (input/input.c:370)
main debug: `sdp://v=0
o=jalles 3444815591 0 IN IP4 192.168.2.42
s=PulseAudio RTP Stream on jalles-desktop
c=IN IP4 224.0.0.56
t=3444815591 0
a=recvonly
m=audio 46888 RTP/AVP 10
a=rtpmap:10 L16/44100/2
a=type:broadcast
' gives access `sdp' demux `' path `v=0
o=jalles 3444815591 0 IN IP4 192.168.2.42
s=PulseAudio RTP Stream on jalles-desktop
c=IN IP4 224.0.0.56
t=3444815591 0
a=recvonly
m=audio 46888 RTP/AVP 10
a=rtpmap:10 L16/44100/2
a=type:broadcast
'
main debug: creating demux: access='sdp' demux='' path='v=0
o=jalles 3444815591 0 IN IP4 192.168.2.42
s=PulseAudio RTP Stream on jalles-desktop
c=IN IP4 224.0.0.56
t=3444815591 0
a=recvonly
m=audio 46888 RTP/AVP 10
a=rtpmap:10 L16/44100/2
a=type:broadcast
'
qt4 debug: Updating the stream status: 3
main debug: looking for access_demux module: 1 candidate
live555 debug: RTP subsession 'audio/L16'
main debug: selecting program id=0
live555 debug: setup start: 0 stop:0
live555 debug: play start: 0 stop:0
main debug: using access_demux module "live555"
main debug: TIMER module_Need() : 4.000 ms - Total 4.000 ms / 1 intvls (Avg 4.000 ms)
main debug: looking for a subtitle file in C:\Program Files\VideoLAN\VLC09\
main debug: looking for decoder module: 34 candidates
araw debug: samplerate:44100Hz channels:2 bits/sample:16
main debug: using decoder module "araw"
main debug: TIMER module_Need() : 0.000 ms - Total 0.000 ms / 1 intvls (Avg 0.000 ms)
main debug: thread 5488 (decoder) created at priority 2 (input/decoder.c:217)
main debug: `sdp://v=0
o=jalles 3444815591 0 IN IP4 192.168.2.42
s=PulseAudio RTP Stream on jalles-desktop
c=IN IP4 224.0.0.56
t=3444815591 0
a=recvonly
m=audio 46888 RTP/AVP 10
a=rtpmap:10 L16/44100/2
a=type:broadcast
' successfully opened
main debug: thread started
qt4 debug: New Event: type 1108
qt4 debug: New Event: type 1103
qt4 debug: Updating the stream status: 3
main debug: control type=1
live555 error: no data received in 10s, aborting
main debug: EOF reached
main debug: finished input
qt4 debug: Updating the stream status: 8
main debug: dying input
main debug: dying input
main debug: removing module "live555"
main debug: removing module "araw"
main debug: thread ended
main debug: thread times: real 0m10.625000s, kernel 0m0.000000s, user 0m0.000000s
main debug: thread 5488 joined (input/decoder.c:248)
main debug: killing decoder fourcc `twos', 0 PES in FIFO
main debug: thread ended
main debug: dead input
main debug: thread times: real 0m10.625000s, kernel 0m0.000000s, user 0m0.000000s
main debug: thread 5344 joined (playlist/engine.c:244)
main debug: TIMER input launching for 'PulseAudio RTP Stream on jalles-desktop' : 9.000 ms - Total 9.000 ms / 1 intvls (Avg 9.000 ms)
main debug: starting new item
main debug: changing item without a request (current 0/1)
main debug: nothing to play

URI: (succeeds)
rtp://@224.0.0.56:46888

message:

Code: Select all

qt4 debug: New item: rtp://@224.0.0.56:46888
main debug: adding item `rtp://@224.0.0.56:46888' ( rtp://@224.0.0.56:46888 )
main debug: rebuilding array of current - root SAP
main debug: rebuild done - 1 items, index 0
main debug: starting new item
main debug: processing request item rtp://@224.0.0.56:46888 node SAP skip 0
main debug: resyncing on rtp://@224.0.0.56:46888
main debug: rtp://@224.0.0.56:46888 is at -1
main debug: creating new input thread
main debug: Creating an input for 'rtp://@224.0.0.56:46888'
main debug: waiting for thread initialization
main debug: thread started
main debug: thread 5836 (input) created at priority 1 (input/input.c:370)
main debug: `rtp://@224.0.0.56:46888' gives access `rtp' demux `' path `@224.0.0.56:46888'
main debug: creating demux: access='rtp' demux='' path='@224.0.0.56:46888'
main debug: looking for access_demux module: 1 candidate
main debug: net: opening 224.0.0.56 datagram port 46888
main debug: Multicast group join request
main debug: IP_ADD_MEMBERSHIP multicast request
main debug: net: opening 224.0.0.56 datagram port 46889
main debug: Multicast group join request
main debug: IP_ADD_MEMBERSHIP multicast request
main debug: using access_demux module "rtp"
main debug: TIMER module_Need() : 4.000 ms - Total 4.000 ms / 1 intvls (Avg 4.000 ms)
main debug: looking for a subtitle file in C:\Program Files\VideoLAN\VLC09\
main debug: `rtp://@224.0.0.56:46888' successfully opened
rtp debug: detected stereo PCM
rtp debug: added payload type 10 (f = 44100 Hz)
main debug: selecting program id=0
main debug: looking for decoder module: 34 candidates
araw debug: samplerate:44100Hz channels:2 bits/sample:0
main debug: using decoder module "araw"
main debug: TIMER module_Need() : 0.000 ms - Total 0.000 ms / 1 intvls (Avg 0.000 ms)
main debug: thread 6068 (decoder) created at priority 2 (input/decoder.c:217)
main debug: thread started
rtp debug: added RTP source (87fdcd41)
main debug: control type=1
qt4 debug: Updating the stream status: 3
main debug: no aout present, spawning one
main debug: looking for audio output module: 3 candidates
aout_directx debug: OpenAudio
aout_directx debug: found device: Primary Sound Driver
aout_directx debug: found device: Realtek HD Audio rear output
aout_directx debug: device supports 2 channels (DEFAULT!)
aout_directx debug: device supports 2 channels
aout_directx debug: device supports 1 channel
aout_directx debug: Windows says your SpeakerConfig is stereo
aout_directx debug: creating DirectSoundThread
main debug: thread started
main debug: thread 6528 (DirectSound Notification Thread) created at priority 15 (directx.c:392)
aout_directx debug: DirectSoundThread ready
main debug: using audio output module "aout_directx"
main debug: TIMER module_Need() : 106.000 ms - Total 106.000 ms / 1 intvls (Avg 106.000 ms)
main debug: output 's16l' 44100 Hz Stereo frame=1 samples/4 bytes
main debug: mixer 'fl32' 44100 Hz Stereo frame=1 samples/8 bytes
main debug: filter(s) 'fl32'->'s16l' 44100 Hz->44100 Hz Stereo->Stereo
main debug: looking for audio filter module: 24 candidates
main debug: using audio filter module "converter_float"
main debug: TIMER module_Need() : 7.000 ms - Total 7.000 ms / 1 intvls (Avg 7.000 ms)
main debug: found a filter for the whole conversion
main debug: looking for audio mixer module: 3 candidates
main debug: using audio mixer module "float32_mixer"
main debug: TIMER module_Need() : 0.000 ms - Total 0.000 ms / 1 intvls (Avg 0.000 ms)
main debug: input 's16b' 44100 Hz Stereo frame=1 samples/4 bytes
main debug: filter(s) 's16b'->'fl32' 44100 Hz->44100 Hz Stereo->Stereo
main debug: looking for audio filter module: 24 candidates
main debug: using audio filter module "converter_float"
main debug: TIMER module_Need() : 0.000 ms - Total 0.000 ms / 1 intvls (Avg 0.000 ms)
main debug: found a filter for the whole conversion
main debug: filter(s) 'fl32'->'fl32' 48510 Hz->44100 Hz Stereo->Stereo
main debug: looking for audio filter module: 24 candidates
main debug: using audio filter module "bandlimited_resampler"
main debug: TIMER module_Need() : 0.000 ms - Total 0.000 ms / 1 intvls (Avg 0.000 ms)
main debug: found a filter for the whole conversion

any hope in being able to choose this from the playlist?

.ja.

Posted: **28 Feb 2009 19:15**

There are two bugs. First, the live555 plugin does not receive any packets, even though the native RTP plugin does. I don't know why.

Second, the SAP parser is not parsing the SDP properly - live555 should not be needed in this case. That should be fixed in VLC 0.9.9; sorry for the inconvenience.

Posted: **28 Feb 2009 19:22**

Glad to help find these little things (I seem to be good at it

)

The VideoLAN Forums

RTP multicast SAP item not parsing?

RTP multicast SAP item not parsing?

Re: RTP multicast SAP item not parsing?

Re: RTP multicast SAP item not parsing?