From 527ef1ef05d09afe9da9c2153d329014983fb8e8 Mon Sep 17 00:00:00 2001
From: Brion Vibber <brion@pobox.com>
Date: Fri, 24 Mar 2023 03:08:40 -0700
Subject: [PATCH] bwahahah

---
 video/combine.sh |  9 +++++++++
 video/extract.sh | 17 +++++++++++++++++
 video/video.sh   | 15 +++++++++++++++
 3 files changed, 41 insertions(+)
 create mode 100644 video/combine.sh
 create mode 100644 video/extract.sh
 create mode 100644 video/video.sh

diff --git a/video/combine.sh b/video/combine.sh
new file mode 100644
index 0000000..75e7117
--- /dev/null
+++ b/video/combine.sh
@@ -0,0 +1,9 @@
+ffmpeg \
+    -r 60000/1001 \
+    -i 'frames/dither-%04d.png' \
+    -i 'colamath-audio.wav' \
+    -ac 2 \
+    -ar 48000 \
+    -vf 'pad=w=534' \
+    -pix_fmt yuv420p \
+    -y colamath-dither.mp4
diff --git a/video/extract.sh b/video/extract.sh
new file mode 100644
index 0000000..e626e3c
--- /dev/null
+++ b/video/extract.sh
@@ -0,0 +1,17 @@
+set -a
+
+mkdir -p frames
+
+ffmpeg \
+    -i colamath-dv.avi \
+    -vf 'yadif=1,scale=160:200,crop=h=160' \
+    -an \
+    -y 'frames/colamath-%04d.png'
+
+ffmpeg \
+    -i colamath-dv.avi \
+    -vn \
+    -ac 1 \
+    -ar 15734 \
+    -acodec pcm_u8 \
+    -y 'colamath-audio.wav'
diff --git a/video/video.sh b/video/video.sh
new file mode 100644
index 0000000..3a21da7
--- /dev/null
+++ b/video/video.sh
@@ -0,0 +1,15 @@
+set -e
+
+for frame in frames/colamath-[0-9][0-9][0-9][0-9].png
+do
+    n="${frame#frames/colamath-}"
+    n="${n%.png}"
+    out="frames/dither-${n}"
+    last="${n:0-1}"
+    node ../dither-image.js "$frame" "$out" &
+    if (( last == 9 ))
+    then
+        wait
+    fi
+done
+wait