add 2gif script

1 files changed, 109 insertions, 0 deletions

diff --git a/scripts/.scripts/2gif.sh b/scripts/.scripts/2gif.sh
new file mode 100755
index 0000000..ec325dc
--- /dev/null
+++ b/scripts/.scripts/2gif.sh
@@ -0,0 +1,109 @@
+#!/bin/sh
+
+# source: https://github.com/Drakirus/dotfiles/blob/master/bin/2gif
+
+$(ffmpeg --help 2> /dev/null > /dev/null)
+
+if [[ $? -ne 0 ]]; then
+  echo "ffmpeg is required!"
+  exit 1
+fi
+
+# default values
+FPS=12
+
+# read the options
+TEMP=`getopt -o c:r:f:t:s:d:hl:: --long resolution:,fps:,start:,to:,duration:,help,loop:: -n $0 -- "$@"`
+eval set -- "$TEMP"
+
+# extract options and their arguments into variables.
+while true ; do
+  case "$1" in
+    -h|--help)
+      echo -e "Usage: $0 [options] <input video file> <output gif name>\n"
+      echo "Options:"
+      echo "  -h, --help            Show this help"
+      echo "  -r, --resolution      Set the pixels wide (preserving the aspect ratio)"
+      echo "  -f, --fps             Set the gif frame rate"
+      echo "                          default 12"
+      echo "  -s, --start           Skip the first x seconds"
+      echo "  -t, --to              Capture to x seconds"
+      echo "  -d, --duration        Set the duration"
+      echo "  -l, --loop            Number of times to loop the output"
+      echo "                          default: no loop"
+      echo "                          -l      output loop infinitely"
+      echo "                          -l10    output loop 10 times"
+      echo "Examples:"
+      echo "  $0 input.mp4 out.gif"
+      echo "  $0 input.mp4 out.gif -s"00:01" -d5 -r450"
+      echo "  $0 input.mp4 out.gif -s"20:00" -d5 -l --fps30"
+      exit;;
+    -r|--resolution)
+      case "$2" in
+        "") shift 2 ;;
+        *) RESOLUTION="$2"; shift 2 ;;
+      esac ;;
+    -t|--to)
+      case "$2" in
+        "") shift 2 ;;
+        *) TO="-t $2"; shift 2 ;;
+      esac ;;
+    -l|--loop)
+      case "$2" in
+        "") LOOP="-loop=0" ; shift 2 ;;
+        *) LOOP="-loop=$2" ; shift 2 ;;
+      esac ;;
+    -f|--fps)
+      case "$2" in
+        "") shift 2 ;;
+        *) FPS="$2"; shift 2 ;;
+      esac ;;
+    -s|--start)
+      case "$2" in
+        "") shift 2 ;;
+        *) START="-ss $2"; shift 2 ;;
+      esac ;;
+    -d|--duration)
+      case "$2" in
+        "") shift 2 ;;
+        *) DURATION="-t $2"; shift 2 ;;
+      esac ;;
+    --) shift ; break ;;
+    *) echo "Internal error!" ; exit 1 ;;
+  esac
+done
+
+if [[ "$#" -ne 2 && "$#" -ne 1  ]]; then
+  echo -e "Usage: $0 [options] <input video file> <output gif name>\n"
+  echo -e "Illegal number of parameters or parameters.\nFor more informations:\n $0 --help "
+  exit 1
+fi
+
+OUTPUT="$2"
+
+if [[ "$#" -eq 1  ]]; then
+  filename=$(basename "$1")
+  filename="${filename%.*}.gif"
+  OUTPUT=$filename
+fi
+
+if [[ "$RESOLUTION" -eq ""  ]]; then
+  eval $(ffprobe -v error -of flat=s=_ -select_streams v:0 -show_entries stream=width "$1")
+  RESOLUTION=${streams_stream_0_width}
+fi
+
+palette=$(mktemp /tmp/palette_XXXX.png)
+
+filters="fps=$FPS,scale=$RESOLUTION:-1:flags=lanczos"
+
+# echo $filters
+
+# http://blog.pkh.me/p/21-high-quality-gif-with-ffmpeg.html#usage
+
+# create global color palette
+ffmpeg -v warning $START $TO $DURATION -i "$1" -vf "$filters,palettegen" -y "$palette"
+
+# create GIF
+ffmpeg -v warning $START $TO $DURATION -i "$1" -i "$palette" -lavfi "$filters [x]; [x][1:v] paletteuse" -y "$OUTPUT"
+
+rm $palette