add a script to extract thumbnails images from videos

extract-thumbnail-from-video

@@ -0,0 +1,23 @@
+#!/usr/bin/env ruby
+
+video_path = ARGV[0]
+thumbnail_path = ARGV[1]
+time = ARGV[2] || "00:00:00.000"
+
+unless video_path && thumbnail_path
+  $stderr.puts "Usage: #{$0} <video-path> <thumbnail-path> [HH:MM:SS.MMM]"
+  exit 10
+end
+
+unless File.exists?(video_path)
+  $stderr.puts "Input video does not exist: #{video_path}"
+  exit 20
+end
+
+if File.exists?(thumbnail_path)
+  $stderr.puts "Cowardly refusing to overwrite existing file at thumbnail path: #{thumbnail_path}"
+  exit 30
+end
+
+`ffmpeg -i '#{video_path}' -ss '#{time}' -vframes 1 '#{thumbnail_path}'`
+exit $?.exitstatus