Add basic processing example

processing/example-sketch.sh

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+#!/bin/bash
+
+#https://github.com/processing/processing/wiki/Command-Line
+
+# processing-java requires the full path of the sketch
+SKETCH=`realpath ./processing/example-sketch`
+echo "$SKETCH"
+# pass all arguments on bash script example-sketch.pde sketch
+processing-java --sketch="${SKETCH}" --run \
+	"${@}"

processing/example-sketch/example-sketch.pde

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+
+//Input should be .jpg or .png
+String input = "";
+String output = "";
+
+PImage inputImage;
+PGraphics canvas;
+
+void setup() {
+  if (args != null) {
+  	if (args.length > 0 && args[0] != null) {
+  		input = args[0];
+  	} else {
+  		println("No input argument provided");
+  		exit();
+  	}
+    if (args.length > 1 && args[1] != null) {
+    	output = args[1];
+    } else {
+    	exit();
+    }
+  } else {
+    println("No arguments provided");
+    exit();
+  }
+
+  //don't show the processing window
+  surface.setVisible(false);
+  //only draw script once
+  noLoop();
+  //use psuedo-random generator
+  randomSeed(50);
+}
+
+void draw () {
+	inputImage = loadImage(input);
+	canvas = createGraphics(inputImage.width, inputImage.height);
+	canvas.image(inputImage, 0, 0);
+
+	/************************
+	 * Do cool things here!!!
+	 ************************/
+	
+	canvas.save(output);
+	exit();
+}

processing/processing.sh

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+#!/bin/bash -e
+
+#####################################################
+# 
+# This script will export all frames of a video and
+# then loop over them by running a processing sketch
+# on each one. The example provided "example-sketch"
+# will
+#
+# Usage: bash processing/processing.sh <input video> <output video>
+#
+#####################################################
+
+INPUT="${1}"
+OUTPUT="${2}"
+
+# Check if output file extension is .mov
+if [[ "${OUTPUT}" != *".mov" ]]; then
+	echo "Please use an .mov extension on your output file argument"
+	exit 1
+fi
+
+mkdir -p frames
+mkdir -p processing-frames
+
+ffmpeg -i "${INPUT}" frames/frame-%06d.png
+
+FRAMES=frames/*.png
+
+for frame in ${FRAMES}; do
+	echo "Processing $frame with example-sketch..."
+	
+	# Run the processing sketch on every frame
+	bash processing/example-sketch.sh "${frame}" "processing-${frame}"
+
+done
+
+ffmpeg -f image2 -i processing-frames/frame-%06d.png -c:v prores_ks -profile:v 3 "${OUTPUT}"
+
+# clean up frames folder
+rm -rf frames
+rm -rf processing-frames