Introducing a simple script that we can use in a filter to change the fps of a recording

utils/resample_event_video.sh

@@ -0,0 +1,45 @@
+#!/bin/sh
+
+FFMPEG=`which ffmpeg`;
+
+if [ -z "$FFMPEG" ]; then
+  echo "You must install the ffmpeg package.  Try sudo apt-get install ffmpeg";
+  exit;
+fi
+
+for i in "$@"
+do
+case $i in
+ -r=*|--rate=*)
+   FPS="${i#*=}"
+   shift
+   ;;
+ -f=*|--file=*)
+   VIDEO_FILE="${i#*=}"
+   shift
+   ;;
+
+ *)
+   EVENT_PATH="${i#*=}"
+   shift
+   ;;
+esac
+done
+
+if [ -z "$EVENT_PATH" ]; then
+  echo "You must specify the path to the event.";
+  exit 255
+fi;
+
+if [ -z "$FPS" ]; then
+  echo "You must specify the new fps.";
+  exit 255
+fi;
+
+$FFMPEG -i "$EVENT_PATH/$VIDEO_FILE" -filter:v fps=fps=$FPS "$EVENT_PATH/output.mp4"
+echo $?
+if [ $? -eq 0 ]; then
+  mv "$EVENT_PATH/output.mp4" "$EVENT_PATH/$VIDEO_FILE"
+fi;
+
+exit 0;