[pulseaudio-discuss] How to redirect pulse audio through ssh?

Sun May 22 12:58:36 PDT 2011

Hi,

Correction on the last two lines:
local sound server: mkfifo *fifo.wav*
local sound server: paplay --volume=48000 -v fifo.wav & nc localhost 1234
>fifo.wav

br,
Quinn

On Sun, May 22, 2011 at 9:57 PM, Quinn Plattel <qiet72 at gmail.com> wrote:

> Well, here is my almost perfect solution:
>
> local sound server: ssh -L 5901:localhost:5901 -L 1234:localhost:1234
> <remote sound client>
> remote sound client: mkfifo output.wav
> remote sound client: parec | sox -t raw -r 44100 -s -L -b 16 -c 2 -
> "output.wav" & cat output.wav | nc -l 1234
> local sound server: mkfifo output.wav
> local sound server: paplay --volume=48000 -v fifo.wav & nc localhost 1234
> >fifo.wav
>
> As you can see, I use port 5901 for VNC and port 1234 to forward sound.
> The only thing is it takes at least 30 seconds before it plays on the
> speakers.
>
> Any ideas why such a huge latency?
>
> br,
> Quinn
>
>
> On Sun, May 22, 2011 at 8:13 PM, Quinn Plattel <qiet72 at gmail.com> wrote:
>
>> Hi,
>>
>> I have now found a partial solution to the protocol error that happens
>> when I try to play sound remotely through pulse.
>> What I did was I played around with different versions of pulseaudio on
>> the remote side by using different versions of Ubuntu.
>> On the local server side, we are using pulseaudio 0.9.15.
>> Ubuntu Lucid Lynx 10.04 has version 0.9.22 of pulseaudio and it gives
>> "protocol error" on the local server side.
>> Ubuntu Koala Karmic 9.10 has version 0.9.19 of pulseaudio and it gives
>> "protocol error" on the local server side.
>> Ubuntu Jaunty Jackelope 9.04 has version 0.9.14 of pulseaudio and it works
>> perfectly without the "protocol error" on the local server side.
>>
>> I will see if I can downgrade the version of pulseaudio in Ubuntu Lucid
>> Lynx.
>>
>> Question: Is it possible to force pulseaudio to use an older protocol?
>>
>> br,
>> Quinn
>>
>>
>> On Sun, May 22, 2011 at 4:49 PM, Quinn Plattel <qiet72 at gmail.com> wrote:
>>
>>> Hi,
>>>
>>> Here are my results....
>>>
>>> On Sat, May 21, 2011 at 7:58 PM, Colin Guthrie <gmane at colin.guthr.ie>wrote:
>>>
>>>> Hi,
>>>>
>>>> I think you're maybe getting a little confused by client and server in
>>>> terms of how things work here (perhaps not, as I've not thoroughly read
>>>> all the many posts in this thread).
>>>>
>>>
>>> You are right.  I used the terminology because of the way I am ssh'ing
>>> from and to.
>>>
>>> 2. Open a terminal and type: "xprop -root | grep PULSE_COOKIE" Ensure
>>>> this has some output. If it does not then chances are the
>>>> "start-pulseaudio-x11" script was not run at login (or you have
>>>> restarted your PA server after logging in). Try just running
>>>> "start-pulseaudio-x11" and see if that fixes it.
>>>>
>>>
>>> "xprop -root | grep PULSE_COOKIE" does not turn up any results on the
>>> local sound server or on the remote sound client side
>>> "dpkg -L pulseaudio | grep start-pulseaudio-x11" does not turn up any
>>> results on the local sound server side but
>>> it does turn up results on the remote sound client side.
>>>
>>>
>>>> 3. Ensure that the tcp native protocol module is loaded. "pacmd
>>>> list-modules | grep module-native-protocol-tcp" If it is not loaded,
>>>> then simply type: "pactl load-module module-native-protocol-tcp"
>>>>
>>>
>>> pacmd gives the error "No PulseAudio daemon running, or not running as
>>> session daemon." on the local sound server side but
>>> I managed to get around this by:
>>>
>>> # stop pulseaudio
>>> # pulseaudio --system --high-priority -C
>>>
>>> and then at the pulseaudio command line: list-modules
>>> Here is the module:
>>> -------------------------------
>>>     index: 18
>>>
>>>     name: <module-native-protocol-tcp>
>>>     argument: <auth-anonymous=1>
>>>     used: -1
>>>     load once: no
>>>     properties:
>>>         module.author = "Lennart Poettering"
>>>         module.description = "Native protocol (TCP sockets)"
>>>         module.version = "0.9.15"
>>> -------------------------------
>>>
>>>
>>>> 4. SSH to your other machine:  ssh -X -R4713:localhost:4713 OTHERMACHINE
>>>>
>>>> If you get a warning:
>>>> Warning: remote port forwarding failed for listen port 4713
>>>> then chances are there is a PA daemon running there already, or you've
>>>> SSH'ed twice. If the former, just change the *first* instance of 4713 to
>>>> a random number of your choice (>1024).
>>>>
>>>
>>> No problems there.
>>>
>>>
>>>>
>>>> 5. On this remote machine, check your cookie is available via the xprop
>>>> command show in step 2. If X11 forwarding is working properly, it should
>>>> show up fine.
>>>>
>>>
>>> "xprop -root | grep PULSE_COOKIE" does not give any results on the remote
>>> machine.
>>>
>>>
>>>> 6. Set the PULSE_SERVER variable to the forwarded tunnel port.
>>>>  export PULSE_SERVER=localhost:4713
>>>> (or the port number you picked in step 4 if different)
>>>>
>>>> 7. Confirm it's all working: PULSE_LOG=99 pactl stat
>>>>
>>>> Results of "PULSE_LOG=99 pactl stat" on the remote sound client side:
>>>
>>> -----------------------------------------
>>> Using shared memory pool with 1024 slots of size 64.0 KiB each, total
>>> size is 64.0 MiB, maximum usable slot size is 65472
>>> Trying to connect to localhost:4713...
>>> SHM possible: yes
>>> Protocol version: remote 16, local 16
>>> Negotiated SHM: no
>>> Connection failure: Connection terminated
>>> -----------------------------------------
>>>
>>> Results on the local sound server side:
>>> ------------------------------------------
>>>
>>> E: protocol-native.c: protocol error, kicking client
>>> ------------------------------------------
>>>
>>>
>>>> Done!!
>>>>
>>>> So in this setup, the cookie used for authentication is forwarded
>>>> automatically via piggy backing on to X11 connections but as you cannot
>>>> connect directly to the machine we've had to override the PULSE_SERVER
>>>> variable to go over the SSH tunnel.
>>>>
>>>> Below is the output from my session where I run these exact commands
>>>> (note the host name in the pactl stat at the end).
>>>>
>>>> HTHs
>>>>
>>>> Col
>>>>
>>>>
>>>> [colin at jimmy ~]$ hostname
>>>> jimmy
>>>> [colin at jimmy ~]$ xprop -root | grep PULSE_COOKIE
>>>> PULSE_COOKIE(STRING) = "71eb0d3d53819c42957ce9......"
>>>> [colin at jimmy ~]$ pacmd list-modules | grep module-native-protocol-tcp
>>>>        name: <module-native-protocol-tcp>
>>>> [colin at jimmy ~]$ ssh -X -R 5555:localhost:4713 mediacentre
>>>> Last login: Sat May 21 18:51:40 2011 from jimmy.local
>>>> [media@(Media)centre ~]$ xprop -root | grep PULSE_COOKIE
>>>> PULSE_COOKIE(STRING) = "71eb0d3d53819c42957ce9......"
>>>> [media@(Media)centre ~]$ export PULSE_SERVER=localhost:5555
>>>> [media@(Media)centre ~]$ PULSE_LOG=99 pactl stat
>>>> Using shared memory pool with 1024 slots of size 64.0 KiB each, total
>>>> size is 64.0 MiB, maximum usable slot size is 65496
>>>> Trying to connect to localhost:5555...
>>>> SHM possible: no
>>>> Protocol version: remote 21, local 16
>>>> Negotiated SHM: no
>>>> Currently in use: 2 blocks containing 149.9 KiB bytes total.
>>>> Allocated during whole lifetime: 1220055 blocks containing 1.6 GiB bytes
>>>> total.
>>>> Sample cache size: 86.0 KiB
>>>> User name: colin
>>>> Host Name: jimmy
>>>> Server Name: pulseaudio
>>>> Server Version: 1.0.0-0.354.1.csg1
>>>> Default Sample Specification: s16le 2ch 44100Hz
>>>> Default Channel Map: front-left,front-right
>>>> Default Sink: alsa_output.pci-0000_00_1b.0.analog-stereo
>>>> Default Source: alsa_input.pci-0000_00_1b.0.analog-stereo
>>>> Cookie: d7756be2
>>>> [media@(Media)centre ~]$
>>>>
>>>>
>>>>
>>>> --
>>>>
>>>> Colin Guthrie
>>>> gmane(at)colin.guthr.ie
>>>> http://colin.guthr.ie/
>>>>
>>>> Day Job:
>>>>  Tribalogic Limited [http://www.tribalogic.net/]
>>>> Open Source:
>>>>  Mageia Contributor [http://www.mageia.org/]
>>>>  PulseAudio Hacker [http://www.pulseaudio.org/]
>>>>  Trac Hacker [http://trac.edgewall.org/]
>>>>
>>>> _______________________________________________
>>>> pulseaudio-discuss mailing list
>>>> pulseaudio-discuss at mail.0pointer.de
>>>> https://tango.0pointer.de/mailman/listinfo/pulseaudio-discuss
>>>>
>>>
>>>
>>>
>>> --
>>> Best regards/Med venlig hilsen,
>>> Quinn Plattel
>>>
>>
>>
>>
>> --
>> Best regards/Med venlig hilsen,
>> Quinn Plattel
>>
>
>
>
> --
> Best regards/Med venlig hilsen,
> Quinn Plattel
>

-- 
Best regards/Med venlig hilsen,
Quinn Plattel
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