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Forum Discussion
Silisia R.
10 years agoNew member | Level 1
does Dropbox compressed photo files???
I'm sending full resolution photo files to clients instead of burning them on a disc, but I want to make sure they are the full resolution. I had a client that had pictures made at Walgreens, and the...
- 8 years ago
I uploaded a 107.5MB TIFF file to Dropbox using a desktop browser, then downloaded the file. I then compared the file in my download folder to the source file.
Both were exact matches down to the byte: 107,525,5436 bytes.
I then checked for JPG. Also an exact match 9,177,764 bytes.
Then I checked CR2 files (Cannon's proprietary file extension)
Drumroll...both files were 23,921,835 bytes.
If you are using some mobile app to upload your photos...switch to desktop if you care about such things, but blame the right party.
Last I checked, I do not work for Dropbox, nor do I own any stock. If you call someone a liar, you better be able to back it up at least as well as dropbox backs up your files.
Tim F.20
9 years agoNew member | Level 2
As has been explained a number of times in this thread, the Dropbox iOS application that uploads from the main phone camera roll to Dropbox absolutely definitely changes files.
There is a blog post that I wrote that lays out in some detail with example files uploaded from my iPhone using a number of cloud services to show the differences, and in Dropbox's case the unique ID number embedded in the file.
I can't make any comment about the uploading of files via the desktop client or via the web as I haven't tested them, but I can say with certainty and proof that images are recompressed during upload from the iOS Dropbox app.
https://blog.night-shade.org.uk/2015/06/dropbox-iphone-camera-upload-changes-photos/
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