Another ridiculous one I decided to make while checking h264 encoded versions of renders in QuickTime Player 7 for compression differences before uploading them to the web. Yes I know that I could open up something like AE or Nuke and easily do difference comparisons between the footage:

But I found the time it takes to do that and all the other things I could get distracted by in AE or Nuke end up taking more time than I really want to spend anyway. And just visually comparing the difference the way the audience will see it makes more sense anyway. So my normal image quality check would require aligning the QuickTime Player windows and cycling between them by using (command ⌘ + ~)

As you would imagine aligning the windows is difficult to ever get perfect. Luckily this was something Applescript could easily handle so I first wrote a simple script that would easily line up all the open QT player windows to the frontmost window. Now I was able to easily cycle between the windows with the same hotkey combo mentioned above. I thought I would try automating this a bit and also found a way to have difference do this for me automatically for me by telling it how many times to cycle and how fast to do it. So now the process is simple. Just open the content you would like to compare in QuickTime Player 7, click the difference app in your dock or Finder toolbar. . .

. . . and difference will line up the content and will ask you how you would like to automatically cycle the images (you can quickly just type 0, return, 0, return if you would like to do it all manually) and then you can just sit back and check it out for yourself, the way your eyes see it on a screen.

Luckily this process seems to be less important as encoding for the web gets better but I always find it a good idea to at visually check to see how something compares to the original before putting it out there for the world to see. With an app this easy to use you no longer have an excuse.

Demo:

QuickTime Version 1440×900 (70MB)

iPhone Version

Download: difference (360KB .zip)

Log:
-2010.3.25: basic functionality
-2010.3.27: added automatic cycling

Not 100% sure if QT player was called QuickTime Player 7 in 10.5.8 so anyone using Leopard let me know and I will make sure to include a version that works.

Enjoy! If there are any issues or concerns please contact: andoruLABS.support. Also, this app is free but feel free to donate like a maniac.

[andoru.labs]