Batch converting images on Mac OSX
If you want to convert png images to jpeg, you should use the following:
Code:
mkdir jpegs; sips -s format jpeg *.* --out jpgs
If the png images were generated using screen capture, you can set the default osx screen capture format to jpeg, rather than png using this command:
Code:
defaults write com.apple.screencapture type jpg
Then restart your computer for the change to take effect. To revert back to the default png format, use “defaults write com.apple.screencapture type png”.
(Source: forums.macrumors.com)
