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Home sharing on iOS may not display some libraries iOS devices
After upgrading to iOS 4.3 on your iPhone and/or iPad you might find yourself in a situation where you don't see all your shared libraries even if they all have Home Sharing enabled with the same Apple ID.

This happens if you have duplicated your library by copying ~/Music/iTunes to one or more machine from another machine. Those libraries will be sharing the same library id and therefore IOs 4.3 is not able to distinguish them even though the Apple TV and other Mac's can.

The fix is to follow this Apple Knowledge Base article to reset your library ID on all the Macs that have copies of the original library.

[crarko adds: I had copied my user account to another machine using the Migration Assistant and observed this issue on my iPad with iOS 4.3.]
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These directions will remove all playlists
Authored by: jfaughnan on Mar 11, '11 07:34:30PM

From the kb article: "If you delete the file, iTunes creates a new, empty copy when you open the application, but any playlists, song ratings, comments, or other information you created will be lost."

This needed to be mentioned in the hint. This is an awful solution for a nasty bug. We need a better answer from Apple.

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John Faughnan
jfaughnan@spamcop.net
www.faughnan.com



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These directions will remove all playlists
Authored by: Mr. H on Mar 12, '11 05:48:50AM

If you continue reading the KB article to the end, you will see how to avoid the problem you mention. Essentially, you delete the "iTunes library" file, then recreate it by importing the "iTunes library.xml" file (which will have your playlists, ratings etc in it).



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Home sharing on iOS may not display some libraries
Authored by: ivarh on Mar 12, '11 01:50:00AM

By moving the my library.xml and then importing playlists from that file as described in you KB article you will get all your playlists back.



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Home sharing on iOS may not display some libraries
Authored by: scottbayes on Mar 12, '11 05:56:20AM
From the kb article: "If you delete the file, iTunes creates a new, empty copy when you open the application, but any playlists, song ratings, comments, or other information you created will be lost."
Without running the experiment—my other computer is down (an iMac 27" literally lying on its face on a bed here in Tokyo so a quake doesn't send it crashing to the floor; it survived the first round but the screen was rotated as far down as it could rotate after the quake, indicating a rough ride) till the Japan earthquake crisis is mostly over and we don't need to conserve power, so I am reluctant to experiment now—I note that the .xml file used as source in the Import Playlists Step 8 does contain at least one of my playlists and at least one comment (too many to verify they're all there), which leads me to believe that Step 8 will restore all the stuff I care about, though it may miss some corners and possibly some stuff others value. I just hope it indeed inserts a new library ID in the process, because I see the original ID there in the .xml.

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Home sharing on iOS may not display some libraries
Authored by: squalene on Mar 13, '11 02:19:17PM

I had this problem, and resetting the library id on the Mac I had copied my library to did fix it.
HOWEVER, doing that also disappeared roughly 1/3 of the album artwork in the reset library.

Apparently Apple stores images either within the track itself, or in some other location (not 'Album Artwork') which is lost when the library is reset.

Fortunately, I had an up to date backup of the iTunes folder.
I copied that, then ran the 'Embed Artwork' script
http://dougscripts.com/itunes/scripts/ss.php?sp=embedart
on the copy.

Initially that gave "parameter errors", but a bit of recoding to the script:
------------------------------------------------
repeat with aTrack in sel
try
repeat with anArtwork in artworks of aTrack
if downloaded of anArtwork is true then
if preflight is equal to false then
set theData to data of anArtwork
set data of anArtwork to theData
end if
set num to num + 1
end if
end repeat
on error msg number ernum
display dialog msg & "\r" & ernum & "\r" & result & "\n" & (name of aTrack as string) & "\n" & id of aTrack as string
end try
end repeat
------------------------------------------
let me ferret out and fix the problem tracks: (export track, delete itunes track,import track back in worked)

Once that was done, applying the 'Embed Artwork' script to the entire music library resulted in every track having art that survives resetting the library.

BACK UP BEFORE YOU TRY THIS TIP!




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