From d7d6894ea0c1a927d3ecd7340f70704ceb7669fd Mon Sep 17 00:00:00 2001
From: Ben Sima <ben@bsima.me>
Date: Thu, 14 Jun 2018 13:42:57 -0700
Subject: Add timelapse script

---
 timelapse | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100755 timelapse

(limited to 'timelapse')

diff --git a/timelapse b/timelapse
new file mode 100755
index 0000000..cc7d470
--- /dev/null
+++ b/timelapse
@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+#
+# Converts a regular video into a 4x timelapse.
+#
+# Research:
+# - https://trac.ffmpeg.org/wiki/How%20to%20speed%20up%20/%20slow%20down%20a%20video
+# - https://superuser.com/questions/777938/ffmpeg-convert-a-video-to-a-timelapse#778425
+# - https://superuser.com/questions/803453/ffmpeg-speed-up-video-but-keep-same-quality
+#
+
+ffmpeg -i "$1" \
+    -vf "setpts=0.25*PTS" \
+    -q 0 \
+    -an "$2"
-- 
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