Adds scripts/shell/ffmpeg-extract-first-frame-from-video.sh script

scripts/shell/ffmpeg-extract-first-frame-from-video.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+filename=$1
+
+if [ -z "$filename" ]; then
+  echo "You must provide a file for the script."
+  echo "Example:"
+  echo "     `basename $0` foo.mp4"
+  exit 1
+fi
+
+if [ ! -f "$filename" ]; then
+  echo "The file provided does not exist."
+  exit 1
+fi
+
+friendly_filename=`sed -E 's/[^[:alnum:][:space:]]+/_/g' <<< "$filename"`
+
+ffmpeg -i $filename -vframes 1 ${friendly_filename}-image.png