I would like to convert images from "progressive" jpeg to "baseline" jpegs with applescript.
I would appreciate to use only tools/apps which are shipped with Mac OS X, like "sips" or
"Image Events".
Is there any possibility?
Thanks in advance!
Opening the progressive JPG in any image editing program and then saving it as JPG should convert the file.
So if you use Image Events in Applescript (which is just a front end to sips) to open the file and then save it choosing JPG as the format that should convert it.
Anyway it is easy enough to test. If that doesn't work post back.
Thanks for your answer. But no. If I do
sips -s format jpeg test.jpg --out test_2.jpg
The jpg is progressive and after that conversion it stays progressive. I check it with exiftool.
Any other idea?
This is turning out to be harder then it should be. I tried a bunch of things with Image Events but so far nothing has worked.
The only way I've been able to convent a progressive jpg to baseline is to open it in GIMP and then export it, the GIMP export dialog has options to save as baseline or progressive.
Even using Preview and it's export command didin't do it.
I'll keep picking at this, if you come up with a solution post back.
I was able able to convert the image using just the builtin tools (Image Events in thsi case but sisp would work)
I opened the original progressive JPG
saved that as a PNG
Opened the PNG and save it as a JPG
the final JPG was baseline. A bit of a klidge but not sure you'll be anle to do much bettter giben the constraints.
regards
Thanks again for your answer! But saving in another format will always lower the quality of the image, so it is not really a good solution.
At the moment I'm using a python script with PIL (which I wrote a few weeks ago), but I would like to have a solution, which is working on every Mac and PIL (the python image library) is not available out-of-the-box, it has to be compiled and installed.
Thanks....
If you save with high quality and round trip the file through TIFF I don't think you'll see much if any image degradation.
Thanks again. That was the solution I was already thinking about, because TIFF does not reduce so much. I'll give that a try....
Thanks!
Here's a small script to get you started with Image Events if you need it:
set inFile to choose file with prompt "Select JPG File" of type "public.jpeg"
set outFile to choose file namewith prompt "Output file name" default locationpath todesktop
set outFile to (outFile as text) & ".jpg"
set tempFile to (path to desktop as text) & "tmp.tiff"
tell application "Image Events"
set im to open inFile
save im as TIFF in tempFile with icon
closeimset im to open tempFile
saveimasJPEGwith compression levelhighinoutFile with iconend tell
regards
How to convert a progressive jpeg to a baseline jpeg with applescript?
