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OK, it’s selecting the right NEF files and it seems they’ll move to right places. Take_nefs_out("pic-folder", "nef-folder", dryrun=True) Newfullpath = fullpath.replace(src_dir, dest_dir, 1) If any(root + jpg_ext in files for jpg_ext in JPG_EXTS): """Take out NEF files in src_dir with no accompanying JPEG files,Ĭreate folder dest_dir, and move the files to dest_dir, Return fn.endswith('.nef') or fn.endswith('.NEF')ĭef take_nefs_out(src_dir, dest_dir, dryrun=False): Part of pre-processing script: import shutil, os, errno So what I did was write and run a pre-processing Python script which takes out all NEF files without corresponding jpg files to a separate folder, then run Image Processor on that separate folder, and finish with a post-processing Python script that takes output jpg files and put them into the original folder.
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The folder I was given had to be processed within few days.
#How to batch convert nef to jpg how to#
Maybe there is a way to customize the job of Image Processor further by scripting, but I had no time to learn how to script Photoshop. How to skip jpg files, and also skip NEF files which already have corresponding jpg files? Photoshop has scripting feature. It first processed pic-folder\10\A.jpg, which is already in JPEG format, and saved the result as pic-folder-dest\10\A.jpg, and then it processed pic-folder\10\A.NEF, and saved the result as pic-folder-dest\10\A_1.jpg because the name pic-folder-dest\10\A.jpg was occupied by then, and so on. Photoshop processed all six files so we got six JPEG files in pic-folder-dest. After Photoshop finishes its job, the file list of pic-folder-dest should be like this: pic-folder-dest\10\A.jpg Photoshop will open each image file in subfolders of pic-folder and save as JPEG in appropriate subfolders of pic-folder-dest. I don’t know what the option “Include ICC Profile” does, but it’s checked by default, so let’s leave it checked. Preferences” section, make sure that “Run Action” is unchecked. File Type” section, make sure the option “Save as JPEG” is checked, which is by default checked. Select location to save processed images” section, select a different folder (an empty folder), say pic-folder-dest, and check “Keep folder structure”. Select the images to process” section, select pic-folder, and check “Include All sub-folders”. Let’s see what Photoshop can do to that folder. The subfolder 20 represents a subfolder where conversion is not done. The subfolder 10 represents a subfolder where somebody else has already converted the NEF files to JPEG but not discarded the NEF files. The file list of pic-folder: pic-folder\10\A.jpg I made a simplified test folder called pic-folder which has two subfolders and six image files in it. Image files in some subfolders were all JPEG, but some subfolders only had NEF files in them, and then there were subfolders which had both JPEG files and NEF files. The images folder I had to work with had many subfolders. See Getting To Know Photoshop: Image Processor You can access the feature by clicking File > Scripts > Image Processor… menu from Photoshop. So I thought maybe what if I could automate Photoshop? Or what if Photoshop had some kind of API? So I googled around further and found that Photoshop has a built-in batch conversion feature. PIL is a popular image library for Python and it doesn’t support reading NEF files. I thought to write a Python script to do the job and googled around but there seemed to be no module for conversion. My task was to convert all NEF files to JPEG and discard the NEF files to save disk space. They were large in file size compared to JPEG files.
#How to batch convert nef to jpg windows#
Windows 7’s built-in file browser could not display the images for NEF files, but Photoshop could. The NEF files are a kind of raw image files taken right from some digital camera. I had a folder given to me and this folder had a lot of image files, some were in JPEG format, and some other were in NEF format. Recently I had to batch convert a bunch of raw image files to JPEG.