Update attribution and modify the export script to not work if file is not provided and is not found.

README.md

@@ -4,6 +4,8 @@ Scripts and templates for making "filmless", cameraless analog films using free
 
 Building off of the [v2f](https://github.com/sixteenmillimeter/v2f) application for generating film-sized strips of images, this is a set of tools for building pixel-perfect image sequences for printing and laser cutting into viable 16mm film strips. Create 16mm films from non-film materials and convert video to strips of film using [Processing](https://processing.org/).
 
+This project was made in collaboration with [Wenhua Shi](https://shiwenhua.net/) for a workshop run during the [Revolutions Per Minute Festival](https://revolutionsperminutefest.org/) held at UMass Boston.
+
 ### [Download](https://github.com/sixteenmillimeter/filmless/archive/master.zip)
 
 ## What this repository contains

filmless_calibration/filmless_calibration.pde

@@ -65,6 +65,9 @@ void printInfo() {
   println("CALIBRATION H (MM): " + (ROWS * (SPACING / DPMM)));
   
   println("SOUNDTRACK SAMPLE RATE: " + (SPACING * 24));
+  
+  println("MAGIC H CORRECTION: " +  MAGIC_H_CORRECTION);
+  println("MAGIC W CORRECTION: " +  MAGIC_W_CORRECTION);
 }
 
 void setup () {

scripts/export.sh

@@ -1,6 +1,12 @@
 #!/bin/bash
 
-WITH_SOUND=true		#change to false for a silent film
+if [[ "${1}" == "" ]]; then
+   echo "Please include path to video file as first argument"
+   exit 1
+fi
+
+
+WITH_SOUND=false		#change to false for a silent film
 
 #changes based on printer DPI, this is for 1440
 #check the output of the calibration script
@@ -11,6 +17,11 @@ AUDIO_RATE=10368
 #or hardcode it by changing VIDEO=${1} to VIDEO=/path/to/my/video.mov
 VIDEO="${1}"
 
+if [ ! -f "${VIDEO}" ]; then
+    echo "Video file ${VIDEO} does not exist, exiting script..."
+    exit 2 
+fi
+
 # change these to directory where you will store your frames and audio
 FRAMES_DIR=~/Desktop/frames/
 AUDIO_DIR=~/Desktop/audio/

scripts/image.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+
+set -e
+
+if [[ "${1}" == "" ]]; then
+	echo "Please provide path to an image as your first argument"
+	exit 1
+fi
+
+if [[ "${2}" == "" ]]; then
+	echo "Please provide your DPI as your second argument"
+	exit 2
+fi
+
+IMAGE="${1}"
+DPI=${2}
+
+filename=$(basename -- "${IMAGE}")
+extension="${filename##*.}"
+
+NEW_IMAGE="${IMAGE/.$extension/.png}"
+
+if [ -f "${IMAGE}" ]; then
+	convert -units PixelsPerInch "${IMAGE}" -density ${DPI} "${NEW_IMAGE}"
+	rm "${IMAGE}"
+else 
+	echo "${IMAGE} does not exist"
+	exit 3
+fi