DLNA and UPNP

Message

pa4wdh · Post by **pa4wdh** » Thu Jan 16, 2025 6:21 pm

Hi All,

I've started experimenting to get DLNA and UPnP going, as far as i know the protocols are closely related, other than that i'm quite unfamiliar with these protocols. Reason is that i expect to be buying equipment which requires this to be able to do what i want to do with it. My end goal has two objectives: Publish a http audio output stream created by mpd, and allow browsing/playing of files in my music collection.

I've started experimenting on my desktop to eliminate any other networking issues, there is no local firewall configured.

So far i'm using VLC as a client, after enabling the zeroconf USE flag it shows "Zeroconf network sercvices" in the playlist. Enabling zeroconf also pulled in avahi, and after starting that daemon VLC started listing some local configured services (ssh and sftp). Of course VLC can't use those, but it seems to confirm that VLC and avahi are working together. On the network i see UDP multicast packets to port 5353 which is DNS-SD.

As a server i've tested with gerbera and minidlnad, both available in ::gentoo. Both seem to be working, but they don't show up in VLC as a possible source of data. When i look at the network traffic i see gerbera and minidlnad multicasting to UDP port 1900 (which is UPnP).

To me it seems like i'm missing a component to put it all together, is anyone able to help me with this?

Thanks in advance.

gentoo_ram · Post by **gentoo_ram** » Thu Jan 16, 2025 6:39 pm

You may need to define a service in the /etc/avahi/services directory. It looks like for TCP DLNA I used this at one time:

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<?xml version="1.0" standalone='no'?><!--*-nxml-*-->
<!DOCTYPE service-group SYSTEM "avahi-service.dtd">

<!-- See avahi.service(5) for more information about this configuration file -->

<service-group>

  <name replace-wildcards="yes">%h</name>

  <service>
    <type>_dlna._tcp</type>
    <port>8200</port>
  </service>

</service-group>

You may need one for your UDP service. Not sure which service name that VLC is looking for.

Anon-E-moose · Post by **Anon-E-moose** » Thu Jan 16, 2025 7:37 pm

How is your /etc/minidlna.conf:

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# port for HTTP (descriptions, SOAP, media transfer) traffic
port=8200

# network interfaces to serve, comma delimited (8 interfaces max)
network_interface=eth0

# specify the user account name or uid to run as
user=minidlna

# set this to the directory you want scanned.
# * if you want multiple directories, you can have multiple media_dir= lines
# * if you want to restrict a media_dir to specific content types, you
#   can prepend the types, followed by a comma, to the directory:
#   + "A" for audio  (eg. media_dir=A,/home/jmaggard/Music)
#   + "V" for video  (eg. media_dir=V,/home/jmaggard/Videos)
#   + "P" for images (eg. media_dir=P,/home/jmaggard/Pictures)
#   + "PV" for pictures and video (eg. media_dir=PV,/home/jmaggard/digital_camera)
media_dir=/n/movies
media_dir=/n/music
media_dir=/n/music-video

I don't use avahi, but my tv running vlc has no problem seeing the dlna server.

pa4wdh · Post by **pa4wdh** » Thu Jan 16, 2025 8:24 pm

Thanks for your responses.

You may need one for your UDP service. Not sure which service name that VLC is looking for.

Do you mean my mpd audio stream? That's TCP based, so think it will be similar to your example.

How is your /etc/minidlna.conf:

Mostly default, i only changed the media_dir to be somewhere in /tmp for testing purposes

Code: Select all

# port for HTTP (descriptions, SOAP, media transfer) traffic
port=8200

# network interfaces to serve, comma delimited (8 interfaces max)
#network_interface=eth0

# specify the user account name or uid to run as
#user=jmaggard

# set this to the directory you want scanned.
# * if you want multiple directories, you can have multiple media_dir= lines
# * if you want to restrict a media_dir to specific content types, you
#   can prepend the types, followed by a comma, to the directory:
#   + "A" for audio  (eg. media_dir=A,/home/jmaggard/Music)
#   + "V" for video  (eg. media_dir=V,/home/jmaggard/Videos)
#   + "P" for images (eg. media_dir=P,/home/jmaggard/Pictures)
#   + "PV" for pictures and video (eg. media_dir=PV,/home/jmaggard/digital_camera)
media_dir=/tmp/dlna

# set this to merge all media_dir base contents into the root container
# note: the default is no
#merge_media_dirs=no

# set this if you want to customize the name that shows up on your clients
#friendly_name=My DLNA Server

# set this if you would like to specify the directory where you want MiniDLNA to store its database and album art cache
#db_dir=/var/lib/minidlna

# set this if you would like to specify the directory where you want MiniDLNA to store its log file
#log_dir=/var/log/minidlna

# set this to change the verbosity of the information that is logged
# each section can use a different level: off, fatal, error, warn, info, or debug
#log_level=general,artwork,database,inotify,scanner,metadata,http,ssdp,tivo=warn

# this should be a list of file names to check for when searching for album art
# note: names should be delimited with a forward slash ("/")
album_art_names=Cover.jpg/cover.jpg/AlbumArtSmall.jpg/albumartsmall.jpg/AlbumArt.jpg/albumart.jpg/Album.jpg/album.jpg/Folder.jpg/folder.jpg/Thumb.jpg/thumb.jpg

# set this to no to disable inotify monitoring to automatically discover new files
# note: the default is yes
inotify=yes

# set this to yes to enable support for streaming .jpg and .mp3 files to a TiVo supporting HMO
enable_tivo=no

# set this to beacon to use legacy broadcast discovery method
# defauts to bonjour if avahi is available
tivo_discovery=bonjour

# set this to strictly adhere to DLNA standards.
# * This will allow server-side downscaling of very large JPEG images,
#   which may hurt JPEG serving performance on (at least) Sony DLNA products.
strict_dlna=no

# default presentation url is http address on port 80
#presentation_url=http://www.mylan/index.php

# notify interval in seconds. default is 895 seconds.
notify_interval=60

# serial and model number the daemon will report to clients
# in its XML description
serial=12345678
model_number=1

# specify the path to the MiniSSDPd socket
#minissdpdsocket=/var/run/minissdpd.sock

# use different container as root of the tree
# possible values:
#   + "." - use standard container (this is the default)
#   + "B" - "Browse Directory"
#   + "M" - "Music"
#   + "V" - "Video"
#   + "P" - "Pictures"
#   + Or, you can specify the ObjectID of your desired root container (eg. 1$F for Music/Playlists)
# if you specify "B" and client device is audio-only then "Music/Folders" will be used as root
#root_container=.

# always force SortCriteria to this value, regardless of the SortCriteria passed by the client
# note: you can prepend the sort criteria with "!" to alter the titles of the objects so that they
# will be alphanumerically sorted in the order you specify here, to work around clients that do their
# own alphanumeric sorting.
#force_sort_criteria=+upnp:class,+upnp:originalTrackNumber,+dc:title

# maximum number of simultaneous connections
# note: many clients open several simultaneous connections while streaming
#max_connections=50

# set this to yes to allow symlinks that point outside user-defined media_dirs.
#wide_links=no

# enable subtitle support by default on unknown clients.
# note: the default is yes
#enable_subtitles=yes

Anon-E-moose · Post by **Anon-E-moose** » Thu Jan 16, 2025 9:24 pm

As far as upnp, I have it disabled at the router for the lan and no problem.
minidlna probably tries upnp to see if the router will allow it.

Is vlc running on the same machine that the dlna servers are?

Edit to add: If you are trying to use upnp from vlc then did you enable upnp when you built vlc?

ETA2: Since you're using avahi (zeroconf use flag) is it set for both vlc and minidlna?

pa4wdh · Post by **pa4wdh** » Fri Jan 17, 2025 6:19 am

With these protocols i don't know exactly what i'm doing, so i might be doing things wrong, if so, please let me know

Is vlc running on the same machine that the dlna servers are?

Yes, for this proof-of-concept everything runs on my desktop.

Edit to add: If you are trying to use upnp from vlc then did you enable upnp when you built vlc?

I did enable zeroconf for vlc, i missed the upnp use flag, i'll enable that later today and retry.

ETA2: Since you're using avahi (zeroconf use flag) is it set for both vlc and minidlna?

Yes. For minidlna zeroconf is enabled, the netgear and readynas flags are disabled.

pa4wdh · Post by **pa4wdh** » Fri Jan 17, 2025 4:11 pm

I have re-merged vlc without the zeroconf use flag and with the upnp use flag and now vlc and minidlnad can find eachother and vlc is now playing music way, so that works

Next step is mpd, which does not have native upnp support, i'm now emerging upmpdcli (https://www.lesbonscomptes.com/upmpdcli/index.html) to see if that works.

Anon-E-moose · Post by **Anon-E-moose** » Fri Jan 17, 2025 4:24 pm

mpd has both upnp and zeroconf USE flags.

All pieces need to be consistent, with things like upnp or zeroconf.

pa4wdh · Post by **pa4wdh** » Fri Jan 17, 2025 5:51 pm

You are right again

, i don't know why i keep overlooking the upnp use flag.

So far upnp seems to work, which i can't say about zeroconf, so upnp seems to be the way to go.

pa4wdh · Post by **pa4wdh** » Fri Jan 17, 2025 6:12 pm

Both upmpcdcli and the upnp use flag on mpd doesn't seem to do what i need.

upmpcdcli wants to control mpd and does so based on upnp events. The upnp use flag on mpd enables it to access upnp resources, but not to become one itself.

What i basically need it something that announces my mpd stream (basically http carrying pcm data) on upnp, and if required does some translation between my stream and a upnp client.

Edit to add:
I'm now experimenting with gerbera. It works for playing files. It's UI allows me to add an audio broadcast item which allows me to enter a URL. If i access this item from gerbera's UI it "downloads" my stream so that's good. Only problem is that the "audio broadcast" doesn't show up in vlc ...

pa4wdh · Post by **pa4wdh** » Sat Jan 18, 2025 6:11 pm

I just used wireshark to capture the traffic between gerbera and vlc.
I see my "Audio Broadcast" entry being transferred between gerbera and vlc, which means gerbera is doing what it's supposed to do, so there is something wrong on the vlc side (or it doesn't support this part of upnp ...).

Anon-E-moose · Post by **Anon-E-moose** » Sat Jan 18, 2025 6:54 pm

Have you tried running vlc with debugging turned on? That might give you some hints.

There should be options for setting verbosity (2 is recommended)

pa4wdh · Post by **pa4wdh** » Sun Jan 19, 2025 10:28 am

Thanks you the suggestion, i did that now. Has far as i can see there is nothing special there, but to be sure i'm sharing it here:

Code: Select all

[000055984c534a20] main playlist debug: processing request item: Audio, node: Universal Plug'n'Play, skip: 0
[000055984c534a20] main playlist debug: rebuilding array of current - root Universal Plug'n'Play
[000055984c534a20] main playlist debug: rebuild done - 4 items, index 0
[000055984c534a20] main playlist debug: starting playback of new item
[000055984c534a20] main playlist debug: resyncing on Audio
[000055984c534a20] main playlist debug: Audio is at 0
[000055984c534a20] main playlist debug: creating new input thread
[00007f5914000ec0] main input debug: Creating an input for 'Audio'
[000055984c534a20] main playlist debug: requesting art for new input thread
[00007f5914000ec0] main input debug: using timeshift granularity of 50 MiB
[00007f5914000ec0] main input debug: using default timeshift path
[00007f5914000ec0] main input debug: `upnp://<ip>:49153/upnp/control/cds?ObjectID=6' gives access `upnp' demux `any' path `<ip>:49153/upnp/control/cds?ObjectID=6'
[00007f58e80011e0] main input source debug: creating demux: access='upnp' demux='any' location='<ip>:49153/upnp/control/cds?ObjectID=6' file='(null)'
[00007f58e8001340] main demux debug: looking for access_demux module matching "upnp": 11 candidates
[00007f58e8001340] main demux debug: no access_demux modules matched
[00007f58ec000c70] main meta fetcher debug: looking for meta fetcher module matching "any": 0 candidates
[00007f58ec000c70] main meta fetcher debug: no meta fetcher modules
[00007f58e8001780] main stream debug: creating access: upnp://<ip>:49153/upnp/control/cds?ObjectID=6
[00007f58e8001780] main stream debug: looking for access module matching "upnp": 22 candidates
[00007f58ec000c70] main art finder debug: looking for art finder module matching "any": 1 candidates
[00007f58e8001780] main stream debug: using access module "upnp"
[00007f58e8001a40] main stream debug: looking for stream_filter module matching "any": 25 candidates
[00007f58e8001a40] main stream debug: no stream_filter modules matched
[00007f58e8001f40] main stream_directory debug: looking for stream_directory module matching "any": 0 candidates
[00007f58e8001f40] main stream_directory debug: no stream_directory modules
[00007f58e80011e0] main input source debug: attachment of directory-extractor failed for upnp://<ip>:49153/upnp/control/cds?ObjectID=6
[00007f58e8001a40] main stream debug: looking for stream_filter module matching "record": 25 candidates
[00007f58e8001a40] main stream debug: using stream_filter module "record"
[00007f58e80011e0] main input source debug: creating demux: access='upnp' demux='any' location='<ip>:49153/upnp/control/cds?ObjectID=6' file='(null)'
[00007f58e8001340] main demux debug: looking for demux module matching "any": 48 candidates
[00007f58e8001340] es demux debug: cannot peek
[00007f58e8001340] es demux debug: cannot peek
[00007f58e8001340] es demux debug: cannot peek
[00007f58e8001340] es demux debug: cannot peek
[00007f58e8001340] es demux debug: cannot peek
[00007f58ec000c70] main art finder debug: no art finder modules matched
[00007f58e8001340] main demux debug: using demux module "directory"
[00007f58e80045b0] main demux meta debug: looking for meta reader module matching "any": 0 candidates
[00007f58e80045b0] main demux meta debug: no meta reader modules
[00007f5914000ec0] main input debug: `upnp://<ip>:49153/upnp/control/cds?ObjectID=6' successfully opened
[000055984c538d60] qt interface debug: IM: Setting an input
[00007f5914000ec0] main input debug: EOF reached
[000055984c534a20] main playlist debug: incoming request - stopping current input
[00007f58e8001340] main demux debug: removing module "directory"
[00007f58e8001a40] main stream debug: removing module "record"
[00007f58e8001780] main stream debug: removing module "upnp"
[000055984c534a20] main playlist debug: dead input
[000055984c534a20] main playlist debug: nothing to play
[000055984c538d60] qt interface debug: IM: Deleting the input
[000055984c534a20] main playlist debug: processing request item: Streams, node: Universal Plug'n'Play, skip: 0
[000055984c534a20] main playlist debug: rebuilding array of current - root Universal Plug'n'Play
[000055984c534a20] main playlist debug: rebuild done - 12 items, index 7
[000055984c534a20] main playlist debug: starting playback of new item
[000055984c534a20] main playlist debug: resyncing on Streams
[000055984c534a20] main playlist debug: Streams is at 7
[000055984c534a20] main playlist debug: creating new input thread
[00007f5914000ee0] main input debug: Creating an input for 'Streams'
[000055984c534a20] main playlist debug: requesting art for new input thread
[00007f5914000ee0] main input debug: using timeshift granularity of 50 MiB
[00007f5914000ee0] main input debug: using default timeshift path
[00007f5914000ee0] main input debug: `upnp://<ip>:49153/upnp/control/cds?ObjectID=536' gives access `upnp' demux `any' path `<ip>:49153/upnp/control/cds?ObjectID=536'
[00007f58f4000fc0] main input source debug: creating demux: access='upnp' demux='any' location='<ip>:49153/upnp/control/cds?ObjectID=536' file='(null)'
[00007f58f4001170] main demux debug: looking for access_demux module matching "upnp": 11 candidates
[00007f58f4001170] main demux debug: no access_demux modules matched
[00007f58e4000c80] main meta fetcher debug: looking for meta fetcher module matching "any": 0 candidates
[00007f58e4000c80] main meta fetcher debug: no meta fetcher modules
[00007f58e4000c80] main art finder debug: looking for art finder module matching "any": 1 candidates
[00007f58e4000c80] main art finder debug: no art finder modules matched
[00007f58f40015c0] main stream debug: creating access: upnp://<ip>:49153/upnp/control/cds?ObjectID=536
[00007f58f40015c0] main stream debug: looking for access module matching "upnp": 22 candidates
[00007f58f40015c0] main stream debug: using access module "upnp"
[00007f58f40018e0] main stream debug: looking for stream_filter module matching "any": 25 candidates
[00007f58f40018e0] main stream debug: no stream_filter modules matched
[00007f58f4001df0] main stream_directory debug: looking for stream_directory module matching "any": 0 candidates
[00007f58f4001df0] main stream_directory debug: no stream_directory modules
[00007f58f4000fc0] main input source debug: attachment of directory-extractor failed for upnp://<ip>:49153/upnp/control/cds?ObjectID=536
[00007f58f40018e0] main stream debug: looking for stream_filter module matching "record": 25 candidates
[00007f58f40018e0] main stream debug: using stream_filter module "record"
[00007f58f4000fc0] main input source debug: creating demux: access='upnp' demux='any' location='<ip>:49153/upnp/control/cds?ObjectID=536' file='(null)'
[00007f58f4001170] main demux debug: looking for demux module matching "any": 48 candidates
[00007f58f4001170] es demux debug: cannot peek
[00007f58f4001170] es demux debug: cannot peek
[00007f58f4001170] es demux debug: cannot peek
[00007f58f4001170] es demux debug: cannot peek
[00007f58f4001170] es demux debug: cannot peek
[00007f58f4001170] main demux debug: using demux module "directory"
[00007f58f4004460] main demux meta debug: looking for meta reader module matching "any": 0 candidates
[00007f58f4004460] main demux meta debug: no meta reader modules
[00007f5914000ee0] main input debug: `upnp://<ip>:49153/upnp/control/cds?ObjectID=536' successfully opened
[000055984c538d60] qt interface debug: IM: Setting an input
[00007f5914000ee0] main input debug: EOF reached
[000055984c534a20] main playlist debug: incoming request - stopping current input
[00007f58f4001170] main demux debug: removing module "directory"
[00007f58f40018e0] main stream debug: removing module "record"
[00007f58f40015c0] main stream debug: removing module "upnp"
[000055984c534a20] main playlist debug: dead input
[000055984c534a20] main playlist debug: nothing to play
[000055984c538d60] qt interface debug: IM: Deleting the input

The log starts from selecting the first directory in gerbera's structure, you can see me selecting "Audio" and "Streams". The "Streams" directory is where the "Audio Broadcast" item is located.

Gerbera offers me three methods to add URL's to it's list: Audio Broadcast, Video Broadcast and External Link, i've tried all of them, none of them shows up in vlc.

Anon-E-moose · Post by **Anon-E-moose** » Sun Jan 19, 2025 12:00 pm

In vlc, is this option available "View -> Playlist -> Local Network -> Universal Plug'n'Play"
and if it is does it show the gerbera server?

(I don't have vlc on my pc, but the android versions work well with minidlna on my pc)

Edit to add: the above is for version 2 of vlc.
In version 3, evidently the network stuff is in it's own area. I'd poke around in the menu to see what's available under network

pa4wdh · Post by **pa4wdh** » Sun Jan 19, 2025 2:53 pm

Anon-E-moose wrote:In vlc, is this option available "View -> Playlist -> Local Network -> Universal Plug'n'Play"
and if it is does it show the gerbera server?

Yes this works with both minidlna and gerbera, normal file browsing and playing is working correctly. My VLC is version 3.0.21,

My goal is to "publish" (i don't know the correct term) my http steam, which is based on mpd with the httpd output plugin, via DLNA. As far as i could see minidlna doesn't offer me a way to add something like this, but gerbera allows me to add items like "Audio Broadcast" which basically is a link to the location of my stream. In gerbera's UI it works, but in vlc the items are not shown. My wireshark trace shows the items are transferred from gerbera to VLC.

Anon-E-moose · Post by **Anon-E-moose** » Sun Jan 19, 2025 3:28 pm

You might need to mess with the dlna servers and vlc.
I'm not sure if they are trying to use the same http port, if so one needs to be set to another port.

I think you're mostly there, it seems to be a configuration conflict.

Edit to add: if you need to change http ports, I would suggest changing gerbera's default and modify vlc to look at that, then vlc would be default for the http port (to other devices), since you have gerbera feeding vlc.

pa4wdh · Post by **pa4wdh** » Sun Jan 19, 2025 3:42 pm

I'm sorry, i don't really understand what you mean. If i would have problems with ports i would expect nothing would work at all, but everything is there except the stream, file browsing and playing are working like they should. Only the stream, which basically is just a link to the real stream, doesn't work.

By the way, i now remember i've had problems with ports, one of the programs (i'm not sure which one) complained about it being in use, i moved gerbera one port up to solve that. I don't see a way to change VLC's port.

I've also checked VLC's issue tracker, and even in recent versions there are quite some open issues regarding UPnP, so maybe VLC is not the best client to test with. I didn't find a bug describing exactly what i'm seeing.

Anon-E-moose · Post by **Anon-E-moose** » Sun Jan 19, 2025 10:35 pm

If you select Browse, from vlc, do you see the dlna/upnp server?

With the upnp/dlna server running you should be able to see it from android phones, vlc, windows machines (all on same network)

pa4wdh · Post by **pa4wdh** » Mon Jan 20, 2025 12:46 pm

I don't have andoid or windows, but in VLC i can see the server, browse for files and play files, it's just that these Audio Broadcast* items are not showing up.

* This is the name Gerbera uses, i don't know if this is official UPnP/DLNA terminology. In the Gerbera Web UI it behaves like a hyperlink.

Anon-E-moose · Post by **Anon-E-moose** » Mon Jan 20, 2025 1:14 pm

What "audio broadcast items" aren't showing up?

The fact that you can select and play items in gerbera from vlc says it's working like it's supposed to.

What do you think it should be doing? Or better yet what are you trying to accomplish (broad outlines)

You have a media server (gerbera) that any upnp capable device can see.
You have vlc that plays media being served from a upnp server.

pa4wdh · Post by **pa4wdh** » Mon Jan 20, 2025 6:11 pm

I think i've already explained what i'm trying to do, but i'll do it again and try to be as explicit as i can. Please ask more specific questions if anything is unclear.

Goals
1) Being able to browse/play files located on my server via UPnP/DLNA. This has already been accomplished with minidlna as well as gerbera, so i think i don't need to tell anything about this.
2) Being able to play my audio stream created by mpd's httpd plugin. Mplayer and VLC are able to play this stream when i point it toward the URL, however, i want it to be able be "discoverable" via UPnP because i'll soon be buying a device which does not have the option to enter a URL, it can only use network services discovered via UPnP. The rest of this text is about this goal.

test setup
Currently i'm simply running all programs on my desktop PC, there are no host based firewalls and there are no network components in between the daemons.
Where daemons are used i usually start them via openrc, as a client program i'm using VLC because i don't have anything else yet.

USE=upnp at mpd
mpd supports upnp, controlled bij a upnp use flag. However, this only allows mpd to read data from a upnp source, it does not publish the output stream.

gerbera
Gerbera (https://gerbera.io) is a UPnP/DLNA server which also has it's own Web UI. This Web UI allows you to manually create "items" next to the files it added to it's index. These items can have various different types, and one of them it an "Audio Broadcast". When i create such an item I can enter a URL, and in Gerbera's Web UI it behaves more or less like a link to the given URL.
When i use VLC to browse to gerbera i can see al files, but i can't see the "Audio Broadcast" item. The directory where i placed the item simply appears to be empty. What i expected is that the item is listed, and when i click it VLC starts playing the stream from the URL i configured. Wireshark confirmed the item is actually transferred from gerbera to VLC, so VLC seems to ignore it.

So far gerbera seems to be able to do what i need, but if other daemons are more suited to my needs i'm in no way bound to gerbera.

Anon-E-moose · Post by **Anon-E-moose** » Mon Jan 20, 2025 6:29 pm

As far as mpd and upnp, read this and see if it helps https://www.lesbonscomptes.com/upmpdcli ... dupnp.html

pa4wdh · Post by **pa4wdh** » Tue Jan 21, 2025 4:47 pm

Thanks for the suggestion, but as you can see from a few posts back:

Both upmpcdcli and the upnp use flag on mpd doesn't seem to do what i need.

upmpcdcli wants to control mpd and does so based on upnp events. The upnp use flag on mpd enables it to access upnp resources, but not to become one itself.

This is also what the article you linked to describes.

Anon-E-moose · Post by **Anon-E-moose** » Tue Jan 21, 2025 5:39 pm

MPD by itself cannot function as a full UPnP server.
Mpd is designed to be a music player for local files, etc.
To have mpd interface with upnp in any fashion requires something like upmpdcli.

Something like this is probably the best that can be done, https://www.lesbonscomptes.com/upmpdcli/index.html

pa4wdh · Post by **pa4wdh** » Tue Jan 21, 2025 6:39 pm

upmpdcli aims to control mpd via UPnP, which can be seen in the image on the page you linked to. It does nothing with the mpd output.
In that image, i need something in between the "mpd" block and the "Amplifier, speakers" block which speaks UPnP.