ffstreamer

#!/bin/bash

#~ Copyright (c) 2017-2018 Robin Groppe, Nicki K-leXx

#~ This program is free software: you can redistribute it and/or modify
#~ it under the terms of the GNU General Public License as published by
#~ the Free Software Foundation, either version 3 of the License, or
#~ (at your option) any later version.

#~ This program is distributed in the hope that it will be useful,
#~ but WITHOUT ANY WARRANTY; without even the implied warranty of
#~ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#~ GNU General Public License for more details.

#~ You should have received a copy of the GNU General Public License
#~ along with this program.  If not, see <http://www.gnu.org/licenses/>.

#~ Dieses Programm ist Freie Software: Sie können es unter den Bedingungen
#~ der GNU General Public License, wie von der Free Software Foundation,
#~ Version 3 der Lizenz oder (nach Ihrer Wahl) jeder neueren
#~ veröffentlichten Version, weiterverbreiten und/oder modifizieren.

#~ Dieses Programm wird in der Hoffnung, dass es nützlich sein wird, aber
#~ OHNE JEDE GEWÄHRLEISTUNG, bereitgestellt; sogar ohne die implizite
#~ Gewährleistung der MARKTFÄHIGKEIT oder EIGNUNG FÜR EINEN BESTIMMTEN ZWECK.
#~ Siehe die GNU General Public License für weitere Details.

#~ Sie sollten eine Kopie der GNU General Public License zusammen mit diesem
#~ Programm erhalten haben. Wenn nicht, siehe <http://www.gnu.org/licenses/>.



usage () {
	echo -e "Usage: $0 <VIDEO FILE> [OPTIONS]\n"
	echo "Options:"
	echo "  -c width:height:x:y  Crops the video to specified values."
	echo -e "  -p                   Makes your stream more private by adding a random\n" \
         "                      string to the stream url."
	echo -e "  -s timestamp         Timestamp where the video starts. You can specify\n" \
         "                      it in seconds or e.g. in hh:mm:ss."
    echo -e "  -a number            Number of the audio stream if you want to chose\n" \
		 "                      between have more than one."
	exit
}

mkconfig () {
	[ -d "$HOME/.config" ] || mkdir "$HOME/.config"
	
	EDITORS=( nano joe vim vi emacs )
	i=0
	while [[ ! "$EDITOR" && "${EDITORS[$i]}" ]]; do
		EDITOR="$(which ${EDITORS[$i]} 2>/dev/null)"
		let "i++"
	done
	
	echo "No config file existing. Creating an new one."
	
	while [ "$URL" == "" ]; do
		echo -n "Please specify the url you want to stream to: "
		read URL
	done
	
	echo -n "If you have a webplayer you can specify the url, too (optional): "
	read WEB_URL
	
	[ "$WEB_URL" ] && {
		declare -l WEB_URL_DYN

		echo -n "Can your webplayer use dynamic urls? [Y/n] "
		read -n 1 WEB_URL_DYN
		case "$WEB_URL_DYN" in
			"n")
				WEB_URL_DYNAMIC=0
			;;
			*)
				WEB_URL_DYNAMIC=1
			;;
		esac
		echo
	}
	
	cat > "$CONFIG" << EOF
PRESET="fast"
VRATE="1600k"
ARATE="128k"
STREAM_URL="$URL"
WEBPLAYER_URL="$WEB_URL"
WEBPLAYER_URL_DYNAMIC="$WEB_URL_DYNAMIC"
EOF
	
	declare -l DO_EDIT
	
	if [ "$EDITOR" ]; then
		echo -n "Do you want to edit the config? [y/N] "
		read -n 1 DO_EDIT
		case "$DO_EDIT" in
			"y"|"j")
				$EDITOR "$CONFIG"
				echo -e "\n"
			;;
			*)
				echo -e "\nYour config is set to:"
				cat "$CONFIG"
				echo
			;;
		esac
	else
		echo "No editor found for editing the config file right now."
	fi
	
	echo -e "Your config ist saved to $CONFIG. If you want to change something you can edit this file.\n"
}


parse_params () {
	OPTIND=2
	while getopts "c:s:a:p" OPTKEY; do
		case "$OPTKEY" in
			"c")
				CROP="-filter:v crop=$OPTARG"
				echo "Video is cropped to:"
				echo "	Width: $(cut -d: -f1 <<<$OPTARG)"
				echo "	Height: $(cut -d: -f2 <<<$OPTARG)"
				echo "	Position X: $(cut -d: -f3 <<<$OPTARG)"
				echo "	Position Y: $(cut -d: -f4 <<<$OPTARG)"
				;;
			"p")
				which pwgen >/dev/null 2>&1 || {
					echo "Error: If you use the -p option you need to install pwgen."
					exit
				}
				PRIVATE_CODE="$(pwgen -sByr ":/?#[]@$&'()*+,;=%\`<>\´^|\"{}" 16 2>/dev/null || pwgen -sB 16)"
				STREAM_URL="${STREAM_URL}-${PRIVATE_CODE}"
				echo -e "Your stream url is:\n\n	$STREAM_URL"
				[ "$WEBPLAYER_URL_DYNAMIC" ] && echo "	Webplayer: ${WEBPLAYER_URL}-${PRIVATE_CODE}"
				echo -e "\n\nCopy this link and share it before you proceed."
				echo -n "Press [Enter] when you're ready to start the stream."
				read
				;;
			"s")
				STARTTIME="-ss $OPTARG"
				echo "Stream starts at position $OPTARG."
				;;
			"a")
				AUDIO_STREAM="$OPTARG"
				echo "Using audio stream #0:$[$OPTARG+1]."
				;;
			*)
				usage
				;;
		esac
	done
}

CONFIG="$HOME/.config/ffstreamer"
VIDEO_FILE="$1"

[ -e "$CONFIG" ] || mkconfig

[ -e "$VIDEO_FILE" ] || {
	echo -e "Error: File \"$1\" not found.\n"	
	usage
}

. $CONFIG

AUDIO_STREAM="0"

parse_params "$@"

ffmpeg -re $STARTTIME -i "$VIDEO_FILE" -map 0:v -map 0:a:$AUDIO_STREAM -c:v libx264 -preset "$PRESET" -r 25 -s hd720 -b:v "$VRATE" -bufsize "$VRATE" $CROP -c:a aac -b:a "$ARATE" -ac 2 -strict -2 -f flv "$STREAM_URL"