gifify

#!/usr/bin/env bash

# Check for tool dependencies
SELF_FULLPATH=`realpath $0`
SELF_DIR=`dirname $SELF_FULLPATH`
# Override default tool list, we only need these two
TOOLS=(ffmpeg)
# Does not depend on any other scripts
SCRIPTS=NONE
if [ ! -r $SELF_DIR/toolchecker ]; then
    echo "toolchecker not found."
    exit 1
else
    . $SELF_DIR/toolchecker
fi

SOURCE=$1
if [ -z $2 ]; then
    START=0
else
    START=$2
fi
if [ -z $3 ]; then
    DURATION=0
else
    DURATION=$3
fi

FILENAME=$(basename "$SOURCE" | sed -e 's/^\(.*\)\..*/\1/g' -e 's/\ /_/g') 
PALETTE="$FILENAME.png"
GIF="$FILENAME.gif"

# QUARTER FILM
#FPS=5.99
# HALF FILM
#FPS=11.988
FPS=23.98
WIDTH=640
#WIDTH=1280

FFMPEG_TIMES=""

if [ $START -ne 0 ]; then
    FFMPEG_TIMES="-ss $START"
fi
if [ $DURATION -ne 0 ]; then
    FFMPEG_TIMES="$FFMPEG_TIMES -t $DURATION"
fi

echo "$SOURCE"
echo "$START"
echo "$DURATION"
echo "$FILENAME"
echo "$GIF"
$FFMPEG -y $FFMPEG_TIMES -i "$SOURCE" -vf fps=$FPS,scale=$WIDTH:-1:flags=lanczos,palettegen $PALETTE
$FFMPEG $FFMPEG_TIMES -i "$SOURCE" -i $PALETTE -filter_complex "fps=$FPS,scale=$WIDTH:-1:flags=lanczos[x];[x][1:v]paletteuse" "$GIF"