add a README.md

Author: monkstone

processing_app/library/video/capture/README.md

@@ -0,0 +1,8 @@
+### README ###
+
+You may know the video capture capabilities of your device (720p, 1280×720 px _or if you are loaded_ 1080p 1920x1080 px), or you could use some clever tool like v4l2-ctl (install v4l-utils linux), to find the right size settings for 'video capture' with your setup, there are probably be any number of tools for Windows / Mac that can do the same thing.
+
+Failing that you could use some old-school safe settings like width 640, height 480 initially (for crappy old 480p cameras).
+
+You should the run the `test_capture.rb` sketch (with width / height adjusted to match your equipment) and that will output the available capture settings (frame-rate etc).
+

processing_app/library/video/capture/test_capture.rb

@@ -36,6 +36,6 @@ def captureEvent(c)
 end
 
 def settings
-  size 960, 544, P2D
+  size 1280, 720, P2D
 end