Support for cover artwork in Frontier Silicon renderers

[asset-user]

Hello,

I'm evaluating Asset UPnP as audio server for my home. I'm surprised by its features and configurability, looks like a very reasoned and mature piece of software.

There's one single issue that I wasn't able to solve by myself yet: my internet radio devices do not show the cover artwork of tracks.

I am able to see the album cover using MiniDLNA as server, so I think that audio files / tags should be OK and client devices have support for artwork.

Clients

• Several internet radios (Medion MD 87528 & MD 87559) with a Frontier Silicon chipset
• User agent: FSL DLNADOC/1.50 UPnP Stack/1.0
• Support for MP3 (ID3) & FLAC and artwork in jpeg format
• No support for PNG

Server

• Raspberry Pi
• AssetUPnP R6.2 beta 12 [Linux-ARM32]

Audio Files

• Format: MP3 with ID3 v2.3 & v2.4, FLAC
• Album cover is included within metadata
• Cover format: jpeg, PNG; size varies between 400px and 800px
• Tag-Editor: MP3Tag

Configuration

• Asset is running as daemon serving several instances
• I tried different combinations of configuration options
  • Support server-side album art resizing
  • Size Album Art
  • UpStream Artwork
  
  
• Audio format streaming for MP3 and FLAC ist set to as is single (the clients otherwise prefer LPCM format)

I created a debug log for both Asset and minidlna when browsing and selecting an mp3 file with cover artwork:

• minidlna-log.txt
• asset-upnp-log.txt

I have a background in software development, but I'm not an expert in UPnP technology. It looks like the DIDL-Lite response message by Asset does not contain a upnp:albumArtURI element, while the minidlna response does.


I appreciate any information about how to solve my problem, be it a misconfiguration on my side, a missing feature or a bug.

- Christian

[PeterP]

Re: Support for cover artwork in Frontier Silicon renderers

Thanks for the bug report.

It sounds like Asset isn't picking the album covers embedded in your tags.
Can you please send a sample file to peter@dbpoweramp.com for analysis?

Thanks.

[asset-user]

Re: Support for cover artwork in Frontier Silicon renderers

I will do so, but I don't think that the problem depends on the audio files. I have no problems using VLC as Control Point / Renderer. VLC shows the artwork as expected. I believe that the Frontier Silicon devices make different calls to the server, thus I attached the debug logs.

[Spoon]

Re: Support for cover artwork in Frontier Silicon renderers

Here is the issue:

===========OnBrowseDirectChildern================
coE9834EA7202140AB Filter: res,res@protection,upnp:searchClass,res@microsoft: codec,res@duration Start Idx: 0 Count: 100
=============================================

Specifically: Filter: res,res@protection,upnp:searchClass,res@microsoft: codec,res@duration

The frontier is specifically not asking for 'upnp:albumArtURI', for most control points they will use a filter of * to get everything.

[Spoon]

Re: Support for cover artwork in Frontier Silicon renderers

What is more odd, is for the other server they ask for:

Filter: upnp:album,dc:creator,upnp:artist,upnp:albumArtURI @dlna:profileID

It seems that player is hard coded to certain upnp servers...

[asset-user]

Re: Support for cover artwork in Frontier Silicon renderers

===========OnBrowseDirectChildern================

There's also a request for albumArtURI in OnBrowseMetadata (lines 66 & 84 in the log)

===========OnBrowseMetadata================
d-9087549540427685794-coE9834EA7202140AB Filter: upnp:album,dc:creator,upnp:artist,upnp:albumArtURI@dlna:profileID Start Index: 0 Count: 1

The reponse does not contain an albumArtURI.

[Spoon]

Re: Support for cover artwork in Frontier Silicon renderers

The art is missing where? when browsing or on the playing screen?

[asset-user]

Re: Support for cover artwork in Frontier Silicon renderers

On the playing screen:


Browsing is text-only:

[Spoon]

Re: Support for cover artwork in Frontier Silicon renderers

Issue fixed (internally), next beta update will roll out the fix

[asset-user]

Re: Support for cover artwork in Frontier Silicon renderers

I can confirm that the bug is fixed in R6.2-beta13. Thanks!