From 37ad2d049b497379a92ba3b032e7d9c6fe65ade6 Mon Sep 17 00:00:00 2001
From: mattmcw <matt@sixteenmillimeter.com>
Date: Sun, 9 May 2021 13:05:38 -0400
Subject: [PATCH] Add basic processing example

---
 processing/example-sketch.sh                 | 10 +++++
 processing/example-sketch/example-sketch.pde | 46 ++++++++++++++++++++
 processing/processing.sh                     | 42 ++++++++++++++++++
 3 files changed, 98 insertions(+)
 create mode 100644 processing/example-sketch.sh
 create mode 100644 processing/example-sketch/example-sketch.pde
 create mode 100644 processing/processing.sh

diff --git a/processing/example-sketch.sh b/processing/example-sketch.sh
new file mode 100644
index 0000000..a811076
--- /dev/null
+++ b/processing/example-sketch.sh
@@ -0,0 +1,10 @@
+#!/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 \
+	"${@}"
\ No newline at end of file
diff --git a/processing/example-sketch/example-sketch.pde b/processing/example-sketch/example-sketch.pde
new file mode 100644
index 0000000..8389f3e
--- /dev/null
+++ b/processing/example-sketch/example-sketch.pde
@@ -0,0 +1,46 @@
+
+//Input should be .jpg or .png
+String input = "";
+String output = "";
+
+PImage inputImage;
+PGraphics canvas;
+
+void setup() {
+  if (args != null) {
+  	if (args.length > 0 && args[0] != null) {
+  		input = args[0];
+  	} else {
+  		println("No input argument provided");
+  		exit();
+  	}
+    if (args.length > 1 && args[1] != null) {
+    	output = args[1];
+    } else {
+    	exit();
+    }
+  } else {
+    println("No arguments provided");
+    exit();
+  }
+
+  //don't show the processing window
+  surface.setVisible(false);
+  //only draw script once
+  noLoop();
+  //use psuedo-random generator
+  randomSeed(50);
+}
+
+void draw () {
+	inputImage = loadImage(input);
+	canvas = createGraphics(inputImage.width, inputImage.height);
+	canvas.image(inputImage, 0, 0);
+
+	/************************
+	 * Do cool things here!!!
+	 ************************/
+	
+	canvas.save(output);
+	exit();
+}
\ No newline at end of file
diff --git a/processing/processing.sh b/processing/processing.sh
new file mode 100644
index 0000000..51586de
--- /dev/null
+++ b/processing/processing.sh
@@ -0,0 +1,42 @@
+#!/bin/bash -e
+
+#####################################################
+# 
+# This script will export all frames of a video and
+# then loop over them by running a processing sketch
+# on each one. The example provided "example-sketch"
+# will
+#
+# Usage: bash processing/processing.sh <input video> <output video>
+#
+#####################################################
+
+INPUT="${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