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[TP1964]

Have tried a “rebuild thumbnails” - it’s all gone. Help would be appreciated.

[Awesome Donkey]

A thumbnail cache rebuild is required because of this change in MC 34.0.20...

Changed: Media Center will cache a higher resolution thumbnail for cover art, reducing access to the full resolution image. This will cause the thumbnail cache to be rebuild. Updating both server and client is recommended.

On the bright side, higher quality thumbnails.

[TP1964]

Thanks! Just selected all and restarted the build. As long as I’m not having to do this myself… all is good!

Appreciate the info!

[TP1964]

Well, I’d love to tell you that this was the answer - but, alas, no. A huge portion of my library has no artwork - and previously it was complete. Any other ideas or should I just go back to 33?

[JimH]

You may need to set your cover art directory in MC's options.  Search window at the bottom.

Wait longer.

[TP1964]

I waited overnight. No change. Cover art is set in 34, to a 34 application directory - but I don’t see a “cover art” directory in 33. I also don’t recall setting one. Please tell me that all of these aren’t just lost.

[mwillems]

I waited overnight. No change. Cover art is set in 34, to a 34 application directory - but I don’t see a “cover art” directory in 33. I also don’t recall setting one. Please tell me that all of these aren’t just lost.

You should have automatic backups of the MC33 library that may contain the thumbnails.  If you roll back to MC33, do the images come back? I think JRiver always stores cover art somewhere (either in the file or in a specified directory or both) so it would be very odd if the art that was previously present is gone. 

To be clear, you ran the "build missing thumbnails" menu item under Options-->Tree and View?  Or something else?

[TP1964]

So here is where I’m at:

1. Upgraded from 33 to 34 - no artwork.
2. Ran rebuild thumbnails - waited overnight - about 50% of the library had no covers.
3. Ran rebuild thumbnails again with all albums selected - still only about 50% of library had covers.
4. Tried to go back to 33, acts like it’s a completely new install. So I just gave up on that - don’t want to start from scratch.
5. Ran quick find in file / Cover Art Directory on all albums - this brought me back to about 90%-ish of all artwork.

So now I’m going through and restoring the few that didn’t by “add from file” in the cover art menu item. I’m about halfway done, so I’m not going to pursue this further. But if there is a recommendation of the best practice on the settings, so one doesn’t lose the artwork between versions like this, I’d very much appreciate the guidance.

If it helps, I would say the majority of the albums that were missing artwork were SACD iso files. Now most of those recovered after I ran “quick find in file…” - but initially those were the ones that acted like there was no artwork and now the ones that are left are just random. Various file types and the majority had artwork in their folders.

Again, guidance is most welcomed.

[mwillems]

I am also seeing major issues with missing cover art in MC 34 for Linux as well.  About half my files don't have cover art and attempting to add back the old cover art from files manually is not working.  Almost all the files showing no cover art have cover art embedded in the file and I can see it in other software, but JRiver can't seem to see it or add it back?

Weirdly, my "missing cover art" smartlist shows only one or two albums for which cover art is genuinely missing.  All the other albums that are not showing cover art in normal library views are not appearing in that smartlist?

This is after manually rebuilding all thumbnails.  Something strange is going on.

[Awesome Donkey]

Is the missing cover art embedded in the files or external cover art images (e.g. folder.jpg). For me all my cover art is embedded in FLAC and DSF files but maybe there's issues with external cover art images?

[mwillems]

Is the missing cover art embedded in the files or external cover art images (e.g. folder.jpg). For me all my cover art is embedded in FLAC and DSF files but maybe there's issues with external cover art images?

So I figured out my issue.  The new thumbnails took up quite a lot more space than the old ones (3-4x as much space) which exhausted the space on the partition that I use for JRiver's library.  So I was just seeing some squirrelly behavior because I'd run out of harddrive space because the JRiver library went from 3 GBs of thumbs to 12+ GBs of thumbs.  Making room on the drive and rebuilding fixed my issue, so not the same issue as OP.

[TP1964]

AD - I’d say the majority - if not all - of the ones with missing artwork for me, were external artwork. As I said previously - the majority were SACD iso files, which I presume have to keep everything external since you can’t really write into them with tags.