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

Sun May 22 21:52:35 PDT 2011

HI.

Last post on this thread, then I will start a new one.
I managed to cut down the delay considerably by simplifying the commands:

local sound server: ssh -L 5901:localhost 5901 -L 1234:localhost:1234
<remote sound client> *parec | nc -l 1234"
local sound server: nc localhost 1234 | pacat

The advantage with this is that the volume can be controlled manually with
the local sound server's volume control and the delay is cut down to 3-5
seconds.

br,
Quinn

On Sun, May 22, 2011 at 9:58 PM, Quinn Plattel <qiet72 at gmail.com> wrote:

> 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
>

-- 
Best regards/Med venlig hilsen,
Quinn Plattel
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