Rebuilding Photo Cache?

Every time I open IPhoto it tells me to rebuild my photo cache. What does that mean and how do I go about rebuilding my photo cache?
Mac OS X (10.4.7)

kellylynn:
Welcome to the Apple Discussions. As PhillyPhan mentioned when you get that message you can either opt not to or to rebuild. If the rebuild does not stop the reoccurring message to rebuild you might try using iPhoto Library Manager to rebuild the library. It does not touch your current library but copies the necessary data and image files from it to create a new library. It often succeeds where the normal rebuild does not. Here's how:
Using iPhoto Library Manager to Rebuild Your iPhoto Library
Download iPhoto Library Manager and launch.
Click on the Add Library button, navigate to your User/Pictures folder and select your iPhoto Library folder.
Now that the library is listed in the left hand pane of iPLM, click on your library and go to the File->Rebuild Library menu option
In the next window name the new library and select the location you want it to be placed.
Click on the Create button.
Note: It can take some time to create the new library if you have a lot of photos. One user reported that with a library of about 5,000 images it took about 12 hours so plan ahead.
Do you Twango?

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Rebuild thumbnail cache

Hi all,
Let me assure you that before posting this question, I read through many of the posts on the same subject. But there were lots of different pieces of advice and I'm not sure which one to use. Also the last post was a few months ago and maybe some new advice has come up.
I'm getting the message to 'Rebuild thumbnail cache' a lot, even though nothing seems to be wrong with the way iPhoto is working. What's the best way to get rid of this message?
I've tried Option + Apple + Launch iPhoto, then selecting all boxes but the 'orphaned photos' one, then rebuilding. That has not stopped the message.
Thanks and regards,
Andrew

Movie lady
Did you go to home/library/caches and delete the iPhoto Folder therein. Then launch iPhoto. It'll take a few moments to launch as it rebuilds the caches.
Do a get info on your HD icon. It'll tell you the capacity and the available space. The reason I ask is that an overfull HD can cause problems like this, but most likely it's just a malformed cache file.
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TD

IPdo photo cache delete problem

I have a lot of images and they are all organized alphabetically and in numerous folders. I have over 40,000 synced photos.
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Rebuilding thumbnaill cache

My iMac hard drive failed. I had it repalced. I use Carbonite online back up and it restored my computer. iPhoto 11 can not see my photos in the libary. It keeps sayig "rebuilding thumbails cache"
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BTW: my other pictures on my desktop were restored with no problem.
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ALRODD

Option 1
Back Up and try rebuild the library: hold down the command and option (or alt) keys while launching iPhoto. Use the resulting dialogue to rebuild. Choose to Repair Database. If that doesn't help, then try again, this time using Rebuild Database.
If that fails:
Option 2
Download iPhoto Library Manager and use its rebuild function. (In Library Manager it's the FIle -> Rebuild command)
This will create an entirely new library. It will then copy (or try to) your photos and all the associated metadata and versions to this new Library, and arrange it as close as it can to what you had in the damaged Library. It does this based on information it finds in the iPhoto sharing mechanism - but that means that things not shared won't be there, so no slideshows, books or calendars, for instance - but it should get all your events, albums and keywords, faces and places back.
Because this process creates an entirely new library and leaves your old one untouched, it is non-destructive, and if you're not happy with the results you can simply return to your old one.
Regards
TD

Ipod and ipad do not play well together with photo cache

Running windows 7 on an hp laptop. Ipod classic, original ipad. Itunes 11.3.1.2. No cloud involvement.
Each time I change between syncing my pad or pod, itunes seems to need to rebuild the photo cache. Nothing lost except about 10 to 15 minutes while all this is done and my entire photo library is copied to the device. Has anyone else seen this? any way to resolve it? Or perhaps have them each create their own cache directory?
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LeePenn
Maybe give this a read. You might have a conflict between the OS level commands and something in Photoshops keyboard commands. Just a thought.
http://kb.adobe.com/selfservice/viewContent.do?externalId=kb405167&sliceId=2

Does iPod Photo Cache clean itself?

I typically shoot 400 photos and keep 100. I don't always delete the extras right away, and a few syncs may occur in between.
I'm wondering -- will the iPod Photo Cache get cluttered up with photos I later deleted... or does the photo sync software know how to "tidy up" as it goes?
I'm wondering if it's worth deleting the iPod Photo Cache periodically and letting it rebuild. I say "worth" because it takes the computer many hours of high CPU to do this job for each of my devices, so I don't want to do it if it's not definitely useful.

In general it's not necessary to delete or "clean" any cache on your mac unless you're having a specific cache related problem. The OS (or the individual) apps do this.
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TD

When opened up iPhoto, it said it was rebuilding thumb caches

I thought a file was an old duplicate iPhoto library so I put it in the trash on my dock. Then when I went to open up iPhoto, it indicated that it was rebuilding thumb caches and then I couldn't view any of the pictures, although the library still indicated that there were 7000 pictures. So I dragged the file out of the trash in case that was the problem. But then I couldn't open up iPhoto anymore and it asked us to choose or create a new library. My husband clicked create a new library and of course, that's blank. But there's no other library to choose from even when I try. I seem to have two back up photo libraries, but they only seem to contain pictures from a long time ago. Where can I find the 7000 pictures that were in my latest library? I really hope it's not lost!
Would really appreciate any help!

Yes. Since iPhoto is now linked to the proper library you can delete those other library folders.
TIP: For insurance against the iPhoto database corruption that many users have experienced I recommend making a backup copy of the Library6.iPhoto database file and keep it current. If problems crop up where iPhoto suddenly can't see any photos or thinks there are no photos in the library, replacing the working Library6.iPhoto file with the backup will often get the library back. By keeping it current I mean backup after each import and/or any serious editing or work on books, slideshows, calendars, cards, etc. That insures that if a problem pops up and you do need to replace the database file, you'll retain all those efforts. It doesn't take long to make the backup and it's good insurance.

Why does iTunes use an iPod Photo Cache at all?

Hi,
When iTunes is used to synchronize photos to a device, it creates an "iPod Photo Cache" folder. Why does this folder even exist?
For users that have multiple devices with multiple resolutions (e.g., iPad 3rd Generation, iPad Mini, iPhone 4S, iPhone 3G), the iPod Photo Cache is grow to approximately four times the original size of the photo. If I have 15 GBs of photos and a 250 GB hard drive, then the combined usage of 75 GBs (15 GB photos + 60 GB cache) is extremely unreasonble.
Device resolutions change often enough (these days) such that having multiple devices is probably more common than having more than one of a single product. iTunes should be designed to do the real-time conversion (which it already does), but not save it to the hard drive.
Also allowing the ability to change the location of the "iPod Photo Cache" folder would help many users, but not myself since I do not have an external drive.
Any help is appreciated.
Thanks.

Thank you for your response. I should have clarified. When trying to delete from the library, it gives me the option to delete them from the computer or just from the library. I choose not to delete them from the computer, just the library. As a result, I would not expect the deletions to free up room on the hard drive, but I don't see how it actually increases the space used up on the hard drive. If I delete a song from the library, but not the computer, does iTunes save the song again someplace else (such that there are now two copies of the song somewhere on the system)? That seems to be the only explanation for why the free space on my hard drive would decrease after deleting a song from the library.
Windows XP Pro

I want to print photo's from my I3. They appear to be saved in photo cache but they wont open. Only way seems to be to e-mail to myself, any help?

I can't print photos taken from my phone. After syncing they appear in a photo cache but wont open and the software from my printer can't do it either. Also tried searching and having Iphone plugged in whilst printing and the printer also can not find the phone to download.

Photos taken with iphone are NOT part of the sync process at all. You should be importing them to your computer regularly as you would with any digital camera.
iPhone User Guide (For iOS 4.2 and 4.3 Software)
Copying personal photos and videos from iPhone, iPad, or iPod touch to your computer

My husband recently tried to sync my ipod to itunes and in the process he managed to loose all the photos I had stored on the ipod. When I go to my pictures folder on my (Dell) laptop there is now a folder called ipod photo cache. How do I view?

My husband recently tried to sync my ipod to itunes and in the process he managed to loose all the photos I had stored on the ipod. When I go to my pictures folder on my (Dell) laptop there is now a folder called ipod photo cache. How do I view these files? They are now show as ITHMB files!

Those photos taken or bumped photos should bi in the iPod's Camera Roll album
- If they are in an iPod backup then restore from that backup. Note however, that the the backup that had the photos may have been overwritten by a subsequent backup that did hot have the photos on the iPod.See the restore topic of:
iOS: How to back up
- If you used PhotoStream then try getting them from your PhotoStream. See that topic of:
iOS: Importing personal photos and videos from iOS devices to your computer
- Have you looked on the computer? Maybe they were imported to the computer and then deleted from the iPod. Since the photos were not synced to the iPod they are not in the iPod Photo Cache folder .

Purpose of folder "Ipod Photo Cache"?

What is the purpose of this folder? Should it be deleted automatically by iTunes after syncing? I've seen several posts here suggesting to delete the folder to try to resolve photo syncing issues. A co-worker tells me that this folder on his machine contains 2GB of .ithmb files. That seems to be a lot of space used unnecessarily.
Thanks,
Jack

No, it isn't/shouldn't be automatically deleted. When photos are synced to an iPhone (or iPod), iTunes creates an 'optimized' version of the picture (all the files are of uniform disk size and pixel resolution) and those are stored in the iPod Photo Cache. You can recover that space if you need to, especially if you put a lot of photos on the device that you later removed (by unchecking those albums, for example). If you delete the cache, iTunes will re-create the optimized versions at the next sync (for all the pics on the device).
http://support.apple.com/kb/TS1314
@DaVBMan, as to why it's large, regardless of their original size, 'optimized' pics take up the same amount of space in the cache, for a given device.
Note that this means if you sync the same photo to an iPhone and an iPod Classic, there will be two copies of that photo in the cache, totaling ~1.6 MB for that one pic, +even if the original pic is a 1 megapixel jpg that's only 150 KB in iPhoto.+

IPod photo cache file - how do I locate it?

Hi all,
On my iPod nano I keep getting the "some of your photos were not copied because they cannot be displayed on your iPod" message, but the photo albums I am syncing do not contain the photo mentioned in the warning.
I have had a look around and noticed that one member said there is an iPod photo cache file that does not get updated. So, I want to delete that and then resync my iPod, in the hope that this warning message will not re appear. The problem is I don't know where it is located.
For the record, I have also recently restored my iPod using iTunes 7.1.1 and this still occurs.
Thanks in advance,
Anthony.
Intel iMac 20" Rev A Mac OS X (10.4.9)

ok well i dont have the exact same problem...but mine still deals with photos
well i recently restored my computer, and all photos and music were deleted, but they r still in my iPod, well i learned how to get my music out, but not my photos, so do u know how to do that?
well any suggestion would b appreciated, thanks!

TS1314 How do you change the default location address (in My Pictures) of the IPOD Photo Cache ?

How do you change the default location address (in my pictures) of the IPOD Photo Cache ?

You do no specifically. It sounds like you are syncing a folder to the iPod. In that case:
From a Folder on Mac OS X, Windows XP, Windows Vista, or Windows 7
The iPod Photo Cache will be located in the folder you selected to sync with.
Thus, you have to change the location of the folder you sync with.

Photo folder / album on phone and pc dissapeared? replaced with ipod photo cache folder? how do i get those photo's back?

i was just syncing pics and it managed to sync 2 folders with around 190 pics then i synced the rest it deleted those 2 folders and those 190 pics dissapeared and in the folder on my pc was ipod photo cache? i really want those photos back since there really special ( friends , family ect.)

The ipod is not a backup/storage device.
You need to copy everything from your old computer to your new one.
The Apple store will do this for you, you can call apple support and they will help you, you can use google.

I'm running iTunes 10.5 on my Macbook Pro and software 4.1 on my 2g iPod touch and having problems getting photo's to sync. Same error iPod can't be synced req'd file can't be found. Tried deleting the photo cache, restoring the iPod etc but to no avail.

I'm running iTunes 10.5 on my Macbook Pro and software 4.1 on my 2g iPod touch and having problems getting photo's to sync. Same error, "iPod can't be synced req'd file can't be found". Tried deleting the photo cache, restoring the iPod etc but to no avail.

Try here:
iTunes: Unable to sync photos
Usually deleting the iPod Photo Cache Folder works. Note that if you sync via the folder method, make sure you dlete all the ifolders since :
The iPod Photo Cache stores the photos that are optimized for display on your iPod, iPad, or iPhone. The location of this folder depends on the syncing options you select. In iTunes, if you change the selection in the “Sync Photos From” pop-up menu, a new iPod Photo Cache folder will be created (and the previous folder will remain).

Rebuilding Photo Cache?

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