From e5adb72851d82d08fddbfb05f9fdffc2edf06f52 Mon Sep 17 00:00:00 2001
From: Brion Vibber <brion@pobox.com>
Date: Sat, 25 Mar 2023 18:28:00 -0700
Subject: [PATCH] wip cats

---
 video-cat/combine.sh | 10 ++++++++++
 video-cat/extract.sh | 17 +++++++++++++++++
 video-cat/video.sh   | 15 +++++++++++++++
 3 files changed, 42 insertions(+)
 create mode 100644 video-cat/combine.sh
 create mode 100644 video-cat/extract.sh
 create mode 100644 video-cat/video.sh

diff --git a/video-cat/combine.sh b/video-cat/combine.sh
new file mode 100644
index 0000000..e6a86bf
--- /dev/null
+++ b/video-cat/combine.sh
@@ -0,0 +1,10 @@
+ffmpeg \
+    -r 60000/1001 \
+    -i 'frames/dither-%04d.png' \
+    -i 'cats-audio.wav' \
+    -ac 2 \
+    -ar 48000 \
+    -vf 'pad=w=640:h=360:x=52:y=20' \
+    -pix_fmt yuv420p \
+    -movflags +faststart \
+    -y cats-dither.mp4
diff --git a/video-cat/extract.sh b/video-cat/extract.sh
new file mode 100644
index 0000000..9c15aa4
--- /dev/null
+++ b/video-cat/extract.sh
@@ -0,0 +1,17 @@
+set -a
+
+mkdir -p frames
+
+ffmpeg \
+    -i 'cats computer fun.mp4' \
+    -vf 'scale=160:150,pad=h=160:y=5' \
+    -an \
+    -y 'frames/cats-%04d.png'
+
+ffmpeg \
+    -i 'cats computer fun.mp4' \
+    -vn \
+    -ac 1 \
+    -ar 15734 \
+    -acodec pcm_u8 \
+    -y 'cats-audio.wav'
diff --git a/video-cat/video.sh b/video-cat/video.sh
new file mode 100644
index 0000000..105fc48
--- /dev/null
+++ b/video-cat/video.sh
@@ -0,0 +1,15 @@
+set -e
+
+for frame in frames/cats-[0-9][0-9][0-9][0-9].png
+do
+    n="${frame#frames/cats-}"
+    n="${n%.png}"
+    out="frames/dither-${n}"
+    last="${n:0-1}"
+    node ../dither-image.js "$frame" "$out" &
+    if (( last == 9 ))
+    then
+        wait
+    fi
+done
+wait