batch convert photos to smaller size for mac

BATCH CONVERT PHOTOS TO SMALLER SIZE FOR MAC HOW TO

Another benefit to graphing all of this stuff is that with a simple dashboard you can keep everyone in the project up to date with your day-to-day progress. By measuring each part of the image conversion process (inspecting original images, copying images to a local ram disk, resizing, comparing to the original, and copying back to the filer), we were able to determine what processes were impacting the overall processing speed. When testing the resizing process, I saw a decent amount of variability in speeds. Nearly all of our projects at Etsy include metrics of one sort or another. So this really could have been written in any scripting language. All of the resizing tasks were executed as shell commands from the Perl script I wrote. It is the 'Swiss army knife', right? I didn't use the GraphicsMagick-Perl library, though. Its flexible command-line parameters (almost the same as ImageMagick's) provided good opportunities for performance tuning which I'll talk about shortly.

If you're not familiar with it, GraphicsMagick is a fork of ImageMagick that has somewhat better performance especially due to its multiprocessor support. There are three tools that made up the majority of this project: GraphicsMagick Instead, we proceeded with what seemed like the simplest approach: batch process the images on our own servers. Both of these options had drawbacks for us. We investigated resizing each photo on-demand as it was displayed on the site.

BATCH CONVERT PHOTOS TO SMALLER SIZE FOR MAC HOW TO

We planned for how to move these images to the cloud and resize the whole batch using EC2. We spent a number of days laying out this project. Images resized over a seven day period using four machines. But at this rate it would take 170 years to resize all of those images.īut here's the spoiler… We did it in nine days. With a bit of practice, I could probably shave a couple of seconds off of that. It takes about 40 seconds for me to find and open a file, scale it to a smaller size, and save it to a new location. To provide a sense of scale, let's consider how long it would take me to resize these images by hand in Photoshop. When I started this project, there were 135 million images for items being sold on Etsy, and that number increases every minute as sellers list new items for sale.

As we redesigned some pages we realized we would need to replace a few of the existing image sizes. When a seller uploads a new photo, it's resized automatically into six different sizes that are displayed throughout the site. Every item being sold on the site can have up to five photos posted with it. We are in the process of redesigning a few of the major sections around. I got a taste of that within my first weeks on the job. Many of our job postings for Engineering positions describe the company as a place 'where the word 'millions' is used frequently and in many contexts'. I joined Etsy back in February and knew immediately that there would be no shortage of technical challenges.

Batch convert photos to smaller size for mac