Remove transparency in bulk - GIMP
I have 3,337 PNG images which all have a transparent background.
First of all, I don't know how to remove transparency...
Second of all, I want to do this with all 3,337 images at the same time.
I might as well kill two birds with one stone: How do I remove transparency from PNG images in GIMP in bulk (multiple items at the same time)?
If you want to remove transparency as part of the background you will want to batch/group convert the png file to jpg. You can find some online programs that will can do this by selecting your directory and choosing the export file.
Try a bulk image convertor http://sourceforge.net/projects/bulkimageconver/
For GIMP: GIMP has a batch mode, I am not experience in this feature but you can find a tutorial on their website and around the web. http://www.gimp.org/tutorials/Basic_Batch/
However you don't necessarily need gimp to batch convert the images.
You can also create an action in Photoshop to do by creating a save for web action and choose jpg as the file type. You can also do this in Lightroom by exporting your library as jpg.