#!/bin/bash
# Linux LOL
# ./yt.sh -y http://www.youtube.com/watch?v=V5bYDhZBFLA 00:17 10 5 160:120

function youtube_to_gif {
	if [[ "$1" == "" ]]; then echo "video url required"; exit 0; fi
	url=$1
	start=${2:-0}
	duration=${3:-15}
	framestep=${4:-5}
	scale=${5:-320:240}
	youtube-dl $url
	video=$(ls ${url##*=}* |grep -v gif| tail -n1)
	gif=${6:-${video%.*}.gif}
	r=${7:-}
	video_to_gif $video $start $duration $framestep $scale $gif $r
}

function video_to_gif {
	if [[ "$1" == "" ]]; then echo "video file required"; exit 0; fi
	video=$1
	start=${2:-0}
	duration=${3:-15}
	framestep=${4:-5}
	scale=",scale="${5:-320:240}
	gif=${6:-${video%.*}.gif}
	echo mplayer $video -ss $start -endpos $duration -vo png:outdir=temp_$video -vf framestep=${framestep}$scale -nosound
	mplayer $video -ss $start -endpos $duration -vo png:outdir=temp_$video -vf framestep=${framestep}$scale -nosound
	cd temp_$video
	if [[ "$7" != "" ]]; then
		lastfile=$(ls -rtv | head -n1)
		count=${lastfile##*0}
		i=${count%%.png}
		for f in $(ls -rtv); do
			let i++
			fc=${f%%.png}; j=$((10#$fc)); k=$((j+1)); z=${fc/$j/}
			cp $f $z$i.png
		done
	fi
	echo "creating gif"
	convert $(ls -tv) $gif
	mv $gif ..
	cd ..
	rm -r temp_$video
	eog $gif
}

function youtube_to_mp3 {
	if [[ "$1" == "" ]]; then echo "video url required"; exit 0; fi
	youtube-dl -b -t $1
	player -dumpaudio $1 -dumpfile ${1%.*}.mp3
}
function youtube_to_mp3_batch {
	youtube-dl -b -t -a videos.txt
	for f in *.flv,*.mp4; do mplayer -dumpaudio $f -dumpfile ${f/%${f##*.}}; done
}

function video_to_mp3 {
	if [[ "$1" == "" ]]; then echo "video file required"; exit 0; fi
	player -dumpaudio $1 -dumpfile ${1%.*}.mp3
}

function help {
	echo "read the source"
}

select=$1
shift
case $select in
  --youtube_to_gif|-y) youtube_to_gif $@;;
  --video_to_gif|-v) video_to_gif $@;;
  --youtube_to_mp3|-t) video_to_gif $@;;
  --video_to_mp3|-m) video_to_gif $@;;
  --help|-h|*) help help;;
esac

#oneliner
#url=http://www.youtube.com/watch?v=V5bYDhZBFLA; youtube-dl -b $url; mplayer $(ls ${url##*=}*| tail -n1) -ss 00:57 -endpos 10 -vo gif89a:fps=5:output=output.gif -vf scale=400:300 -nosound

#mplayer f4vRdgdj75I.mp4 -ss 0:45 -endpos 6 -vo png:outdir=animated4 -vf framestep=5 -nosound
#convert *.png out.gif

#url=http://www.youtube.com/watch?v=V5bYDhZBFLA; youtube-dl -b $url; video=$(ls ${url##*=}*| tail -n1); mplayer $video -ss 00:57 -endpos 5 -vo png:outdir=animated_$video -vf scale=400:300,framestep=5 -nosound; cd animated_$video; convert *.png $video.gif