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seen Mar 18 at 15:13

Feb
22
comment Extract frames from video and set timestamp on images
@slhck: Also, that example creates a textfile with filenames and timestamps. It doesn't assign the timestamps to the files.
Feb
20
asked Extract frames from video and set timestamp on images
Aug
25
awarded  Supporter
Oct
15
comment Does iPhoto do lossless JPEG cropping?
This is my experience also. I saved a raw image as 90% JPEG, and there was noticeable (when looking at the pixel-level) quality loss. Then I repeated 20 times saving the previous JPEG as a new 90% JPEG. The final JPEG had extremely little change compared to the original JPEG, and far less quality loss than saving as JPEG in the first place. So to conclude, if you start saving as JPEG anyway, then don't worry about resaving in the same quality level.