Add thumbnail support

[ghost]

Basic Info

This is a feature request.

I'm using Android in version: 7.1.1 (Pixel)

I'm running Cryptomator in version: 0.3.1

Description

Please show thumbnails as in the Native Dropbox Android App. Scrolling through hundreds of files named IMG_20160604_165251.jpg is very inconvenient.

[tobihagemann]

Thank you for your feature request!

Additional info: It's similar to the iOS app (cryptomator/cryptomator-ios#73) and comes with the same challenges.

[ghost]

Perhaps you could do something similar to Windows. When jpg/png/gif files are added to the Vault, the Cryptomator app creates (or updates) a hidden "thumbs.db" file, which then gets sync'd to dropbox. Then when users open a vault on android (or iOS), Cryptomator automatically downloads, decrypts "thumbs.db", to display thumbnails. It would be far less bandwidth and CPU intensive than generating the thumbnails on the fly.

…

On Tue, Mar 14, 2017 at 1:04 PM, Tobias Hagemann ***@***.***> wrote: Thank you for your feature request! Additional info: It's similar to the iOS app (cryptomator/cryptomator-ios# 73 <cryptomator/cryptomator-ios#73>) and comes with the same challenges. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#41 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AB2Fr6VGmHbWgE4LkbVtFR7Ha-7wwNZnks5rlsijgaJpZM4Mc27S> .

-- m: 347-542-7368

[markuskreusch]

@ghost Yes, thats something we already discussed internally. Problems with this approach are that thumbnails for existing images would not be available, but this could be acceptable. An alternative could be to use the cache implemented in #48, but of course this would only work for some image files. We will see what we will do in the end.

[jwsp1]

Doesn't Cryptomator need to fully download all files before being able to show thumbnails? This probably takes ages given that phones take 5-10MP photos.
Technically, would it be possible to download a compressed/rescaled version of photos?
A 9 MB photo results in a ~400KB (1366x768 pixels) or ~700KB (1920x1080 pixels) file. Even on a tablet, 1920x1080 pixel photos still look pretty clear. This will heavily increase download/decrypt speed.
So to get thumbnails work, I would welcome the ability to download/cache certain (sub-)folders.

[serialpotato]

Wont it be possible to also keep thumbnails of images encrypted in the cache directory of encrypted storage and the cryptomator app configured to automatically decrypt the encrypted cache as it lists the files. Ideally, these thumbs would be a fraction of image, <100Kb with some whatsapp picture algo that retains most detail with minimum size. It will take few more moment to load all thumbnails as the whole directory is listed. And when user clicks on a file, full image is downloaded.

So a cache directory, whatsapp like algo for image thumbnail retaining max data in small size and app to auto load all thumbs or of coreesponding directory when its visited

[LearningAsIGo71]

Not having thumbnails for pics and videos (at the very least pics) seems to be a fairly big issue for a number of folks including myself. I use pCloud and they also do not offer thumbnail previews for their encrypted volumes. So many people are simply not encrypting their pics and videos uploaded to pCloud or they are (using pCloud's native encryption or Cryptomater) and dealing with the inconvenience of not being able to preview anything.

Maybe Cryptomator could do a fund-raising campaign to get this feature implemented? I'd be happy to contribute some dollars towards such a feature.

[eylenburg]

+1 from me

At the moment, Cryptomator is unusable for me on Android. I can't do much with a bunch of files named 20220502_135648.jpg or DCIM0737.jpg and I don't understand what's the difficulty in implementing this feature. Surely there can be an least a manual "scan" of the files in order to create thumbnails (would need to be downloaded temporarily to decrypt). Or alternatively, the desktop app creates some kind of (encrypted) thumbnails database (like the thumbs.db that Windows Explorer creates) and the mobile app then uses that to display thumbnails + adds new thumbnails to it whenever a picture/video is uploaded through the mobile app.

[JustFanta01]

@eylenburg I agree. Even an encrypted .thumbnails folder inside the Photos vault would probably be enough.
When the Android client unlocks the vault, it checks for the presence of the folder and matches the thumbnail name with the photo name.
Obviously you have to keep the files synchronized (add photo <=> add thumbnail, delete photo <=> delete thumbnail).

[Chistex]

@Chistex While I understand your frustration, this is not the place to let it out. If you don't have anything to contribute other than rambling, please look for a different place.

Okay i'm sorry for my frustration.

This is the correct place to talk about the feature request. A response by the developers would be fine and would help all other people to understand the situation.

Thank you very much in advance.

[eylenburg]

@Chistex While I understand your frustration, this is not the place to let it out. If you don't have anything to contribute other than rambling, please look for a different place.

Okay i'm sorry for my frustration.

This is the correct place to talk about the feature request. A response by the developers would be fine and would help all other people to understand the situation.

Thank you very much in advance.

I agree. It would be very nice to get some indication from the developers WHETHER they are working on this feature and if so, when it is expected to ship.

[tobihagemann]

No, we're not working on it right now. Maybe a more elaborate answer to the current situation: #478 (comment)

[Azul-dev]

This app would be perfect if only it had a thumbnail feature.
Is there currently no development of this feature?
I'm wondering if there hasn't been any movement on this basic feature in over 6 years...
Is it technically difficult?

[JaniruTEC]

There is no active development work being done on this feature right now.

We understand that the lack of progress on this particular feature is frustrating. Cryptomator is developed by a very small team, and we are trying to make the best out of our limited time and resources. We ask for your patience until we get to doing this.

On a positive note: I am happy to tell you that we were able to allocate more development hours to the Android App recently and this feature might get picked up in the foreseeable future in the course of that. Please mind the word "might", tho.

Thanks for your support and patience.