#!/bin/sh

# Turn video files on STDIN into animated GIFs.

FPS=${FPS:-10}
SCALE=${SCALE:-480}

while [ $1 ]
do
    BASENAME=$(echo $1 | cut -d'.' -f1)
    FRAMEDIR=/tmp/$BASENAME-frames-$(date +%s)

    mkdir -p $FRAMEDIR
    echo Writing frames...
    ffmpeg -loglevel quiet -i $1 -vf scale=-1:$SCALE,fps=$FPS $FRAMEDIR/%05d.png
    echo Creating GIF...
    convert -loop 0 $FRAMEDIR/*.png $BASENAME.gif
    rm -r $FRAMEDIR
    echo Done.
    shift
done