RTP multicast SAP item not parsing?

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jalles
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RTP multicast SAP item not parsing?

Postby jalles » 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.

Rémi Denis-Courmont
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Re: RTP multicast SAP item not parsing?

Postby Rémi Denis-Courmont » 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.
Rémi Denis-Courmont
https://www.remlab.net/
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jalles
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Joined: 28 Feb 2009 15:23

Re: RTP multicast SAP item not parsing?

Postby jalles » 28 Feb 2009 19:22

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


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