The VideoLAN Forums

Posted: **08 Jun 2012 10:32**

Hi all,
I'm using vlc 1.1.9 on an ubuntu 11.04 machine.
I'm trying to get an rtp stream and send it to stdout where it will be used by asterisk for a music on hold application.
Some time ago i got it working but now I started a new machine and I can't really remember what I did...

The command I'm running is:

Code: Select all

vlc-wrapper rtp://@:5004 --sout=#transcode{acodec=ulaw,ab=64,samplerate=8000,channels=1}:std{access=file,mux=raw,dst=-}

(I'm sure I haven't changed this)
But when the audio is played on the softphones, there's a repeated noise while the song can be "recognized" in the background.

Here are the messages shown by VLC:

Code: Select all

...
rtp warning: too many RTP sessions
rtp debug: removing RTP source (86c13faf)
main debug: removing module "mpeg_audio"
main debug: killing decoder fourcc `mpga', 0 PES in FIFO
main debug: removing a sout input (sout_input:0x9857838)
main debug: TIMER encoding audio frame : 0.003 ms - Total 4.134 ms / 1449 intvls (Avg 0.003 ms)
main debug: removing module "mpeg_audio"
main debug: removing module "avcodec"
main debug: Filter 0x986708c removed from chain
main debug: removing module "mpgatofixed32"
main debug: Filter 0x9859214 removed from chain
main debug: removing module "ugly_resampler"
main debug: Filter 0x9b536a4 removed from chain
main debug: removing module "simple_channel_mixer"
main debug: Filter 0x98a26bc removed from chain
main debug: removing module "audio_format"
mux_dummy debug: removing input
main warning: no more input streams for this mux
main debug: Program doesn't contain anymore ES
main debug: looking for packetizer module: 21 candidates
main debug: using packetizer module "mpeg_audio"
main debug: TIMER module_need() : 0.153 ms - Total 0.153 ms / 1 intvls (Avg 0.153 ms)
main debug: thread (decoder) created at priority 5 (input/decoder.c:301)
rtp debug: added RTP source (a80ac5e2)
main debug: thread started
mpeg_audio debug: MPGA channels:2 samplerate:44100 bitrate:128
main debug: adding a new sout input (sout_input:0x9867410)
stream_out_transcode debug: creating audio transcoding from fcc=`mpga' to fcc=`ulaw'
main debug: looking for decoder module: 30 candidates
main debug: using decoder module "mpeg_audio"
main debug: TIMER module_need() : 0.360 ms - Total 0.360 ms / 1 intvls (Avg 0.360 ms)
main debug: looking for encoder module: 12 candidates
avcodec debug: libavcodec already initialized
avcodec debug: found encoder PCM MU-LAW
main debug: using encoder module "avcodec"
main debug: TIMER module_need() : 0.735 ms - Total 0.735 ms / 1 intvls (Avg 0.735 ms)
stream_out_transcode debug: Looking for filter (mpga->s16l, channels 2->1, rate 44100->8000)
main debug: looking for audio filter module: 13 candidates
mpgatofixed32 debug: mpga->f32l, bits per sample: 0
main debug: using audio filter module "mpgatofixed32"
main debug: TIMER module_need() : 0.080 ms - Total 0.080 ms / 1 intvls (Avg 0.080 ms)
main debug: Filter 'mpgatofixed32' (0x986708c) appended to chain
main debug: looking for audio filter module: 13 candidates
main debug: using audio filter module "ugly_resampler"
main debug: TIMER module_need() : 0.073 ms - Total 0.073 ms / 1 intvls (Avg 0.073 ms)
main debug: Filter 'ugly_resampler' (0x9859214) appended to chain
main debug: looking for audio filter module: 13 candidates
main debug: using audio filter module "simple_channel_mixer"
main debug: TIMER module_need() : 0.061 ms - Total 0.061 ms / 1 intvls (Avg 0.061 ms)
main debug: Filter 'simple_channel_mixer' (0x98755fc) appended to chain
main debug: looking for audio filter module: 13 candidates
audio_format debug: f32l->s16l, bits per sample: 32->16
main debug: using audio filter module "audio_format"
main debug: TIMER module_need() : 0.063 ms - Total 0.063 ms / 1 intvls (Avg 0.063 ms)
main debug: Filter 'audio_format' (0x983f244) appended to chain
stream_out_transcode debug: Got complete audio filter chain
main debug: adding a new input
mux_dummy debug: adding input
mpeg_audio debug: MPGA channels:2 samplerate:44100 bitrate:128
mpgatofixed32 debug: libmad error: bad main_data_begin pointer
mpgatofixed32 debug: libmad error: bad main_data_begin pointer
rtp warning: 4 packet(s) lost
main warning: trying to send non-dated packet to stream output!
mpgatofixed32 debug: libmad error: Huffman data overrun
rtp warning: 10 packet(s) lost
rtp warning: 9 packet(s) lost
main warning: trying to send non-dated packet to stream output!
rtp warning: 10 packet(s) lost
main warning: trying to send non-dated packet to stream output!
main warning: trying to send non-dated packet to stream output!
mpgatofixed32 debug: libmad error: Huffman data overrun
...

and it goes on and on showing these last messages...

Could anybody tell me how to fix this?
Thank you!!
Ben.

Posted: **08 Jun 2012 11:39**

Looks like there is too heavy packet loss or reordering on the network.

Posted: **08 Jun 2012 12:25**

but I'm streaming and getting the audio on the same machine...

I tried doing the same but without asterisk and in that case I get no error messages... so the problem must be somewhere between VLC and Asterisk... When writing to stdout or when reading from stdin...

It's quite strange...

Posted: **08 Jun 2012 14:16**

No. Something is clearly wrong with the RTP sender or the network, given the large number of RTP-related warnings.

Posted: **08 Jun 2012 14:41**

this is what I'm sending:

Code: Select all

:sout=#rtp{dst=192.168.1.221,port=5004} :no-sout-rtp-sap :no-sout-standard-sap :ttl=1 :sout-keep

just for trying I'm streaming from the same machine as the asterisk is running so network should not be an issue (I hope!)
and this is the messages I get:

Code: Select all

main debug: looking for services probe module: 9 candidates
main debug: no services probe module matching "any" could be loaded
main debug: TIMER module_need() : 7.038 ms - Total 7.038 ms / 1 intvls (Avg 7.038 ms)
qt4 debug: Sorting by column -1, order 0
qt4 debug: Sorting by column -1, order 0
main debug: control type=3
mpeg_audio debug: emulated startcode (no startcode on following frame)
mpeg_audio debug: emulated startcode
mpeg_audio debug: emulated startcode (no startcode on following frame)
mpeg_audio debug: emulated startcode
mpeg_audio debug: emulated startcode
mpeg_audio debug: emulated startcode (no startcode on following frame)
mpeg_audio debug: emulated startcode (no startcode on following frame)
main debug: Buffering 0%
main debug: Buffering 8%
main debug: Buffering 17%
main debug: Buffering 26%
main debug: Buffering 34%
main debug: Buffering 43%
main debug: Buffering 52%
main debug: Buffering 60%
main debug: Buffering 69%
main debug: Buffering 78%
main debug: Buffering 87%
main debug: Buffering 95%
main debug: Stream buffering done (313 ms in 0 ms)
main debug: Decoder buffering done in 2 ms
main debug: EOF reached
main debug: finished input
main debug: removing module "mpeg_audio"
main debug: killing decoder fourcc `mpga', 0 PES in FIFO
main debug: removing a sout input (sout_input:0x8807ee8)
main debug: removing module "mpeg_audio"
main debug: removing module "es"
main debug: removing module "stream_filter_record"
main debug: removing module "filesystem"
main debug: Program doesn't contain anymore ES
main debug: thread ended
main debug: dead input
main debug: repeating item
main debug: starting new item
main debug: creating new input thread
main debug: Creating an input for 'Streaming'
main debug: thread (input) created at priority 10 (input/input.c:220)
main debug: thread started
main debug: reusing sout
main debug: you probably want to use gather stream_out
main debug: using timeshift granularity of 50 MiB
main debug: using timeshift path '/tmp'
main debug: `/home/traintic/Music/beethoven.mp3' gives access `' demux `' path `/home/traintic/Music/beethoven.mp3'
main debug: creating demux: access='' demux='' path='/home/traintic/Music/beethoven.mp3'
main debug: looking for access_demux module: 8 candidates
main debug: no access_demux module matching "any" could be loaded
main debug: TIMER module_need() : 0.164 ms - Total 0.164 ms / 1 intvls (Avg 0.164 ms)
main debug: creating access '' path='/home/traintic/Music/beethoven.mp3'
main debug: looking for access module: 7 candidates
vcd debug: trying .cue file: /home/traintic/Music/beethoven.cue
vcd debug: could not find .cue file
filesystem debug: opening file `/home/traintic/Music/beethoven.mp3'
main debug: using access module "filesystem"
main debug: TIMER module_need() : 0.309 ms - Total 0.309 ms / 1 intvls (Avg 0.309 ms)
main debug: Using AStream*Stream
main debug: pre buffering
main debug: received first data after 0 ms
main debug: pre-buffering done 1024 bytes in 0s - 76923 KiB/s
main debug: looking for stream_filter module: 5 candidates
main debug: no stream_filter module matching "any" could be loaded
main debug: TIMER module_need() : 0.054 ms - Total 0.054 ms / 1 intvls (Avg 0.054 ms)
main debug: looking for stream_filter module: 1 candidate
main debug: using stream_filter module "stream_filter_record"
main debug: TIMER module_need() : 0.046 ms - Total 0.046 ms / 1 intvls (Avg 0.046 ms)
main debug: creating demux: access='' demux='' path='/home/traintic/Music/beethoven.mp3'
main debug: looking for demux module: 52 candidates
es debug: detected format mpga
main debug: looking for packetizer module: 21 candidates
main debug: using packetizer module "mpeg_audio"
main debug: TIMER module_need() : 0.063 ms - Total 0.063 ms / 1 intvls (Avg 0.063 ms)
main debug: using demux module "es"
main debug: TIMER module_need() : 0.163 ms - Total 0.163 ms / 1 intvls (Avg 0.163 ms)
main debug: starting in async mode
main debug: looking for meta reader module: 2 candidates
lua debug: Trying Lua scripts in /home/traintic/.local/share/vlc/lua/meta/reader
lua debug: Trying Lua scripts in /usr/lib/vlc/lua/meta/reader
lua debug: Trying Lua playlist script /usr/lib/vlc/lua/meta/reader/filename.luac
lua debug: Trying Lua scripts in /usr/share/vlc/lua/meta/reader
main debug: no meta reader module matching "any" could be loaded
main debug: TIMER module_need() : 0.611 ms - Total 0.611 ms / 1 intvls (Avg 0.611 ms)
main debug: `/home/traintic/Music/beethoven.mp3' successfully opened
mpeg_audio debug: MPGA channels:2 samplerate:44100 bitrate:128
main debug: selecting program id=0
main debug: looking for packetizer module: 21 candidates
main debug: using packetizer module "mpeg_audio"
main debug: TIMER module_need() : 0.061 ms - Total 0.061 ms / 1 intvls (Avg 0.061 ms)
main debug: thread (decoder) created at priority 5 (input/decoder.c:301)
qt4 debug: IM: Deleting the input
main debug: TIMER input launching for 'Streaming' : 161.414 ms - Total 161.414 ms / 1 intvls (Avg 161.414 ms)
main debug: thread started
main debug: Buffering 0%
main debug: switching to sync mode
main debug: Buffering 8%
main debug: Buffering 17%
main debug: Buffering 26%
main debug: Buffering 34%
main debug: Buffering 43%
main debug: Buffering 52%
main debug: Buffering 60%
main debug: Buffering 69%
main debug: Buffering 78%
main debug: Buffering 87%
main debug: Buffering 95%
main debug: Stream buffering done (313 ms in 0 ms)
mpeg_audio debug: MPGA channels:2 samplerate:44100 bitrate:128
main debug: adding a new sout input (sout_input:0x8789bc8)
stream_out_rtp debug: maximum RTP packet size: 1400 bytes
main debug: net: connecting to [192.168.1.221]:5004
main debug: net: connecting to [192.168.1.221]:5005 from [192.168.1.221]:59066
stream_out_rtp debug: sdp=
v=0
o=- 15239177430566428365 15239177430566428365 IN IP4 ubuntu
s=Unnamed
i=N/A
c=IN IP4 192.168.1.221
t=0 0
a=tool:vlc 1.1.9
a=recvonly
a=type:broadcast
a=charset:UTF-8
m=audio 5004 RTP/AVP 14
b=AS:128
b=RR:0
a=rtpmap:14 MPA/90000/2

main debug: Decoder buffering done in 0 ms
qt4 debug: IM: Setting an input

I can't see any problem here...

and as for the receiver:

Code: Select all

application=/usr/bin/vlc-wrapper rtp://@:5004 --sout=#transcode{acodec=ulaw,ab=64,channels=1,samplerate=8000}:file{mux=raw,dst=-}

and the messages:

Code: Select all

rtp debug: removing RTP source (22c04981)
main debug: removing module "mpeg_audio"
main debug: killing decoder fourcc `mpga', 0 PES in FIFO
main debug: removing a sout input (sout_input:0x86aa1f0)
main debug: TIMER encoding audio frame : 0.002 ms - Total 8.074 ms / 1249 intvls (Avg 0.006 ms)
main debug: removing module "mpeg_audio"
main debug: removing module "avcodec"
main debug: Filter 0x862936c removed from chain
main debug: removing module "mpgatofixed32"
main debug: Filter 0x86b3e9c removed from chain
main debug: removing module "ugly_resampler"
main debug: Filter 0x86b41d4 removed from chain
main debug: removing module "simple_channel_mixer"
main debug: Filter 0x85d0f3c removed from chain
main debug: removing module "audio_format"
mux_dummy debug: removing input
main warning: no more input streams for this mux
main debug: Program doesn't contain anymore ES
main debug: looking for packetizer module: 21 candidates
main debug: using packetizer module "mpeg_audio"
main debug: TIMER module_need() : 0.192 ms - Total 0.192 ms / 1 intvls (Avg 0.192 ms)
main debug: thread (decoder) created at priority 5 (input/decoder.c:301)
rtp debug: added RTP source (6dae8305)
main debug: thread started
mpeg_audio debug: MPGA channels:2 samplerate:44100 bitrate:128
main debug: adding a new sout input (sout_input:0x85aa2b0)
stream_out_transcode debug: creating audio transcoding from fcc=`mpga' to fcc=`ulaw'
main debug: looking for decoder module: 30 candidates
main debug: using decoder module "mpeg_audio"
main debug: TIMER module_need() : 0.389 ms - Total 0.389 ms / 1 intvls (Avg 0.389 ms)
main debug: looking for encoder module: 12 candidates
avcodec debug: libavcodec already initialized
avcodec debug: found encoder PCM MU-LAW
main debug: using encoder module "avcodec"
main debug: TIMER module_need() : 0.713 ms - Total 0.713 ms / 1 intvls (Avg 0.713 ms)
stream_out_transcode debug: Looking for filter (mpga->s16l, channels 2->1, rate 44100->8000)
main debug: looking for audio filter module: 13 candidates
mpgatofixed32 debug: mpga->f32l, bits per sample: 0
main debug: using audio filter module "mpgatofixed32"
main debug: TIMER module_need() : 0.076 ms - Total 0.076 ms / 1 intvls (Avg 0.076 ms)
main debug: Filter 'mpgatofixed32' (0x85d0f3c) appended to chain
main debug: looking for audio filter module: 13 candidates
main debug: using audio filter module "ugly_resampler"
main debug: TIMER module_need() : 0.071 ms - Total 0.071 ms / 1 intvls (Avg 0.071 ms)
main debug: Filter 'ugly_resampler' (0x8556cf4) appended to chain
main debug: looking for audio filter module: 13 candidates
main debug: using audio filter module "simple_channel_mixer"
main debug: TIMER module_need() : 0.062 ms - Total 0.062 ms / 1 intvls (Avg 0.062 ms)
main debug: Filter 'simple_channel_mixer' (0x85c7ddc) appended to chain
main debug: looking for audio filter module: 13 candidates
audio_format debug: f32l->s16l, bits per sample: 32->16
main debug: using audio filter module "audio_format"
main debug: TIMER module_need() : 0.071 ms - Total 0.071 ms / 1 intvls (Avg 0.071 ms)
main debug: Filter 'audio_format' (0x8702cb4) appended to chain
stream_out_transcode debug: Got complete audio filter chain
main debug: adding a new input
mux_dummy debug: adding input
mpeg_audio debug: MPGA channels:2 samplerate:44100 bitrate:128
mpgatofixed32 debug: libmad error: bad main_data_begin pointer
mpgatofixed32 debug: libmad error: bad main_data_begin pointer
rtp warning: 6 packet(s) lost
main warning: trying to send non-dated packet to stream output!
rtp warning: 10 packet(s) lost
rtp warning: 10 packet(s) lost
main warning: trying to send non-dated packet to stream output!
rtp warning: 10 packet(s) lost
main warning: trying to send non-dated packet to stream output!
mpgatofixed32 debug: libmad error: Huffman data overrun
main warning: trying to send non-dated packet to stream output!
rtp warning: 8 packet(s) lost
main warning: trying to send non-dated packet to stream output!
mpgatofixed32 debug: libmad error: Huffman data overrun
rtp warning: 10 packet(s) lost
main warning: trying to send non-dated packet to stream output!
rtp warning: 11 packet(s) lost
rtp warning: 10 packet(s) lost
main warning: trying to send non-dated packet to stream output!
mpgatofixed32 debug: libmad error: Huffman data overrun
rtp warning: 10 packet(s) lost
main warning: trying to send non-dated packet to stream output!
main warning: trying to send non-dated packet to stream output!
rtp warning: 8 packet(s) lost
main warning: trying to send non-dated packet to stream output!
mpgatofixed32 debug: libmad error: Huffman data overrun
rtp warning: 10 packet(s) lost
main warning: trying to send non-dated packet to stream output!
rtp warning: 10 packet(s) lost
rtp warning: 11 packet(s) lost
main warning: trying to send non-dated packet to stream output!
mpgatofixed32 debug: libmad error: Huffman data overrun
main warning: trying to send non-dated packet to stream output!
rtp warning: 10 packet(s) lost
main warning: trying to send non-dated packet to stream output!
rtp warning: 8 packet(s) lost
main warning: trying to send non-dated packet to stream output!
mpgatofixed32 debug: libmad error: Huffman data overrun
rtp warning: 10 packet(s) lost
main warning: trying to send non-dated packet to stream output!
rtp warning: 10 packet(s) lost
rtp warning: 10 packet(s) lost
main warning: trying to send non-dated packet to stream output!
mpgatofixed32 debug: libmad error: Huffman data overrun
rtp warning: 10 packet(s) lost
main warning: trying to send non-dated packet to stream output!
mpgatofixed32 debug: libmad error: Huffman data overrun
main warning: trying to send non-dated packet to stream output!
mpgatofixed32 debug: libmad error: Huffman data overrun
rtp warning: 9 packet(s) lost
main warning: trying to send non-dated packet to stream output!
mpgatofixed32 debug: libmad error: Huffman data overrun
rtp warning: 10 packet(s) lost
rtp warning: 10 packet(s) lost
main warning: trying to send non-dated packet to stream output!
mpgatofixed32 debug: libmad error: Huffman data overrun
mpgatofixed32 debug: libmad error: Huffman data overrun
rtp warning: 10 packet(s) lost
main warning: trying to send non-dated packet to stream output!
mpgatofixed32 debug: libmad error: Huffman data overrun
rtp warning: 10 packet(s) lost
main warning: trying to send non-dated packet to stream output!
mpgatofixed32 debug: libmad error: Huffman data overrun
main warning: trying to send non-dated packet to stream output!
rtp warning: 8 packet(s) lost
main warning: trying to send non-dated packet to stream output!
mpgatofixed32 debug: libmad error: Huffman data overrun
rtp warning: 11 packet(s) lost
rtp warning: 10 packet(s) lost
main warning: trying to send non-dated packet to stream output!
mpgatofixed32 debug: libmad error: Huffman data overrun
rtp warning: 10 packet(s) lost
main warning: trying to send non-dated packet to stream output!
mpgatofixed32 debug: libmad error: Huffman data overrun
main warning: trying to send non-dated packet to stream output!
rtp warning: 10 packet(s) lost
main warning: trying to send non-dated packet to stream output!
mpgatofixed32 debug: libmad error: Huffman data overrun
rtp warning: 8 packet(s) lost
main warning: trying to send non-dated packet to stream output!
mpgatofixed32 debug: libmad error: Huffman data overrun
rtp warning: 10 packet(s) lost
main warning: trying to send non-dated packet to stream output!
mpgatofixed32 debug: libmad error: Huffman data overrun
rtp warning: 10 packet(s) lost
rtp warning: 11 packet(s) lost
main warning: trying to send non-dated packet to stream output!
mpgatofixed32 debug: libmad error: Huffman data overrun
main warning: trying to send non-dated packet to stream output!
rtp warning: 10 packet(s) lost
mpgatofixed32 debug: libmad error: Huffman data overrun
mpgatofixed32 debug: libmad error: Huffman data overrun
main warning: trying to send non-dated packet to stream output!
rtp warning: 67 packet(s) lost
main warning: trying to send non-dated packet to stream output!
mpgatofixed32 debug: libmad error: Huffman data overrun
rtp warning: 49 packet(s) lost
main warning: trying to send non-dated packet to stream output!
mpgatofixed32 debug: libmad error: Huffman data overrun
mpgatofixed32 debug: libmad error: Huffman data overrun

If I can provide more information just tell me!

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