I bought a MBP about 4 weeks ago and have only recently been able to start using it full-time (it's a business thing
). Anyway, I'm trying to learn the OSX way of doing things and I must be missing something.I figured out how to use Automator to convert a bunch of JPEGs to PNGs (very cool!). But the problem was in creating the JPEGs in the first place. I was starting with the 456x608 images that RPTroll provided that show portraits of male elves, female elves, and so forth. Each image was a collage with 48 sub-images. I found that I could use Automator to crop images, but I didn't see any way to take the 48 sub-images (6 cols, 8 rows) out of the original JPEG and create new images. I ended up using the convert program from the ImageMagick suite on my Linux laptop instead, combined with a couple of nested for loops in bash. The pseudo-code would look something like:
Code: Select all
for row in 0 75 150 225 300 375 450 525
for col in 0 75 150 225 300 375
convert $inputfile -crop 75x75+$col+$row $outputfileAnyway, I couldn't find any way to do this on my Mac using the built-in tools. Of course, I could probably get ImageMagick for OSX, but I wanted to try to do this using just standard tools. If anyone can help me with this, I'd appreciate it.
In the mean time, I'm going to grab ffmpeg off the web so that I can convert my TiVo video into MPEG-4. (And yes, that's the next challenge with OSX -- can this be done using pre-installed tools?)
Thanks for your help!
