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#!/bin/bash
createRandomTimeCode(){
  local sec=$(( $RANDOM % 60 + 0 ));  local min=$(( $RANDOM % 60 + 0 ));  local hou=$(( $RANDOM % 2 + 0 ));  local timecode=$( printf '%d:%d:%d' $hou $min $sec );
  echo "$timecode"
}
#=======================================================
#=======================================================
## SCRIPT TO CREATE VIDEO MOSAIC 3x3
## INPUT PARAMETERS
inputFilename="The_Scarlet_Empress_1934_a_film_directed_by_Josef_von_Sternberg_with_Marlene_Dietrich_John_Lodge_Louise_Dresser_Sam_Jaffe-1378964146886.mp4"
metadataTitle="The.Scarlet.Empress.1934"
scaleSize_x=436
scaleSize_y=320
fileType="webm"
EXTRACTCLIPS=true
COMBINECLIPS=false
CREATEMOSAIC=true
RANDOM_TIMECODES=false
MOSAIC_3x3=true
MOSAIC_3x1=false
RANDOM=12375
LOG_FILENAME="log_file.txt"
TESTRANDOM=false
#$(mktemp)
#RANDOM Each time this parameter is referenced, a random integer between 0 and 32767 is generated.  The sequence of random numbers may be
# initialized by assigning a value to RANDOM.  If RANDOM is unset, it loses its special properties,  even  if  it  is  subsequently reset.
#=======================================================
#=======================================================
#0. TEST RANDOM
if $TESTRANDOM; then
echo -e "=====================" >> $LOG_FILENAME
currentDate=`date`
echo -e "$currentDate" >> $LOG_FILENAME
echo -e "TESTRANDOM" >> $LOG_FILENAME
for (( i=0; i<=10; i++ ))
do
	timejump="$(createRandomTimeCode)"
	echo -e " " >> $LOG_FILENAME
	echo -e "$i" >> $LOG_FILENAME
	echo "$timejump" >> $LOG_FILENAME
done
echo -e "=====================" >> $LOG_FILENAME
fi
#=======================================================
#=======================================================
#1. EXTRACT CLIPS
if $EXTRACTCLIPS; then
libVid="libvpx"
#libVid="libvpx-vp9"
out_Filenames=("input1" "input2" "input3" "input4" "input5" "input6" "input7" "input8" "input9")
out_Timejumps=("00:00:58" "00:04:58" "00:04:49" "00:10:56" "00:20:29" "00:21:18" "00:23:41" "00:24:10" "00:28:18")
out_Timelength=("00:00:05" "00:00:05" "00:00:05" "00:00:05" "00:00:05" "00:00:05" "00:00:05" "00:00:05" "00:00:05")
out_bitRates=("2M" "2M" "2M" "2M" "2M" "2M" "2M" "2M" "2M")
out_subtitles=("null" "null" "null" "null" "null" "null" "null" "null" "null")
#subtitles=subs.srt
#######
ss_Timejump="00:00:01"
scaleSize=$( printf '%dx%d' $scaleSize_x $scaleSize_y )

totalNumber=${#out_Filenames[*]}
number_timejumps=${#out_Timejumps[*]}
number_timelengths=${#out_Timelength[*]}
number_bitrates=${#out_bitRates[*]}
number_subs=${#out_subtitles[*]}

#LOG info
echo -e "=====================" >> $LOG_FILENAME
currentDate=`date`
echo -e "$currentDate" >> $LOG_FILENAME
echo -e "new_log_file" >> $LOG_FILENAME
echo -e "$metadataTitle" >> $LOG_FILENAME
echo -e "$scaleSize" >> $LOG_FILENAME


for (( i=0; i<=$(( $totalNumber -1 )); i++ ))
do

	if $RANDOM_TIMECODES; then
		timejump="$(createRandomTimeCode)"
	else
		if [ "${i}" -gt "${number_timejumps}" ]; then timejump="$(createRandomTimeCode)"; else timejump="${out_Timejumps[$i]}"; fi
	fi
	if [ "${i}" -gt "${number_timelengths}" ]; then timelength="00:00:01"; else timelength="${out_Timelength[$i]}"; fi
	if [ "${i}" -gt "${number_bitrates}" ]; then bitrate="1M"; else bitrate="${out_bitRates[$i]}"; fi
	if [ "${i}" -gt "${number_subs}" ]; then subs="null"; else subs="${out_subtitles[$i]}"; fi

	#LOG info
	echo -e "====================="
	echo -e "${out_Filenames[$i]}"
	echo -e "$timejump"
	echo -e "$timelength"
	echo -e "${out_Filenames[$i]}" >> $LOG_FILENAME
	echo -e "$timejump" >> $LOG_FILENAME
	echo -e "$timelength" >> $LOG_FILENAME
	echo -e "=====================" >> $LOG_FILENAME
	echo -e "====================="

	#CLIP EXTRACTION
	ffmpeg -ss "$timejump" -i "$inputFilename" -c:v "$libVid" -b:v "$bitrate" -s "$scaleSize" -ss "$ss_Timejump" -t "$timelength"  -vf "$subs" -sn -an -metadata title="$metadataTitle" -f "$fileType" -y -pass 1 /dev/null

	ffmpeg -ss "$timejump" -i "$inputFilename" -c:v "$libVid" -b:v "$bitrate" -s "$scaleSize" -ss "$ss_Timejump" -t "$timelength"  -vf "$subs" -sn -an -metadata title="$metadataTitle" -f "$fileType" -y -pass 2 "${out_Filenames[$i]}.$fileType"
done
fi
#=======================================================
#=======================================================
#2. COMBINE CLIPS
if $COMBINECLIPS; then
#ffmpeg -f concat -safe 0 -i list.txt output.mp4
#list.txt
#file 'input1.webm'
#file 'input2.webm'

ffmpeg -f concat -safe 0 -i lista.txt inputa.webm
ffmpeg -f concat -safe 0 -i listb.txt inputb.webm
#ffmpeg -f concat -safe 0 -i listc.txt inputc.webm
#ffmpeg -f concat -safe 0 -i listd.txt inputd.webm
#ffmpeg -f concat -safe 0 -i liste.txt inpute.webm
#ffmpeg -f concat -safe 0 -i listf.txt inputf.webm
#ffmpeg -f concat -safe 0 -i listg.txt inputg.webm
#ffmpeg -f concat -safe 0 -i listh.txt inputh.webm
#ffmpeg -f concat -safe 0 -i listi.txt inputi.webm

fi
#=======================================================
#=======================================================
#3. CREATE MOSAIC
if $CREATEMOSAIC; then
mosaic_bitRate="1.5M"
#mosaic_libVid="libvpx"
mosaic_libVid="libvpx-vp9"

#CALCULATE WINDOW SIZE
let scaleSize_x2=$scaleSize_x*2
let scaleSize_x3=$scaleSize_x*3
let scaleSize_x4=$scaleSize_x*4
let scaleSize_y2=$scaleSize_y*2
let scaleSize_y3=$scaleSize_y*3
let scaleSize_y4=$scaleSize_y*4
totalSize_3x3=$( printf '%dx%d' $scaleSize_x3 $scaleSize_y3 )
totalSize_3x1=$( printf '%dx%d' $scaleSize_x $scaleSize_y3 )
scaleSize=$( printf '%dx%d' $scaleSize_x $scaleSize_y )

#MOSAIC PARAMETERS
parameters_3x3="nullsrc=size=$totalSize_3x3 [base]; [0:v] setpts=PTS-STARTPTS, scale=$scaleSize [upperleft]; [1:v] setpts=PTS-STARTPTS, scale=$scaleSize [uppercenter]; [2:v] setpts=PTS-STARTPTS, scale=$scaleSize [upperright]; [3:v] setpts=PTS-STARTPTS, scale=$scaleSize [centerleft]; [4:v] setpts=PTS-STARTPTS, scale=$scaleSize[centercenter]; [5:v] setpts=PTS-STARTPTS, scale=$scaleSize [centerright]; [6:v] setpts=PTS-STARTPTS, scale=$scaleSize [lowerleft]; [7:v] setpts=PTS-STARTPTS, scale=$scaleSize [lowercenter]; [8:v] setpts=PTS-STARTPTS, scale=$scaleSize [lowerright]; [base][upperleft] overlay=shortest=1 [tmp1]; [tmp1][uppercenter] overlay=shortest=1:x=$scaleSize_x [tmp2]; [tmp2][upperright] overlay=shortest=1:x=$scaleSize_x2 [tmp3]; [tmp3][centerleft] overlay=shortest=1:y=$scaleSize_y [tmp4]; [tmp4][centercenter] overlay=shortest=1:x=$scaleSize_x:y=$scaleSize_y [tmp5]; [tmp5][centerright] overlay=shortest=1:x=$scaleSize_x2:y=$scaleSize_y [tmp6]; [tmp6][lowerleft] overlay=shortest=1:y=$scaleSize_y2 [tmp7]; [tmp7][lowercenter] overlay=shortest=1:x=$scaleSize_x:y=$scaleSize_y2 [tmp8]; [tmp8][lowerright] overlay=shortest=1:x=$scaleSize_x2:y=$scaleSize_y2"

parameters_3x1="nullsrc=size=$totalSize_3x1 [base]; [0:v] setpts=PTS-STARTPTS, scale=$scaleSize [upper]; [1:v] setpts=PTS-STARTPTS, scale=$scaleSize [center]; [2:v] setpts=PTS-STARTPTS, scale=$scaleSize [lower]; [base][upper] overlay=shortest=1 [tmp1]; [tmp1][center] overlay=shortest=1:y=$scaleSize_y [tmp2]; [tmp2][lower] overlay=shortest=1:y=$scaleSize_y2"

if $MOSAIC_3x3; then
#3x3
	TOPL="input1.webm"
	TOPC="input2.webm"
	TOPR="input3.webm"
	MIDL="input4.webm"
	MIDC="input5.webm"
	MIDR="input6.webm"
	BOTL="input7.webm"
	BOTC="input8.webm"
	BOTR="input9.webm"

	#CREATE MOSAIC 3x3 1
	ffmpeg -i "$TOPL" -i "$TOPC" -i "$TOPR" -i "$MIDL" -i "$MIDC" -i "$MIDR" -i "$BOTL" -i "$BOTC" -i "$BOTR" -filter_complex "$parameters_3x3" -c:v "$mosaic_libVid" -b:v "$mosaic_bitRate" -sn -f "$fileType" -an -metadata title="$metadataTitle" -y -pass 1 "/dev/null"

	ffmpeg -i "$TOPL" -i "$TOPC" -i "$TOPR" -i "$MIDL" -i "$MIDC" -i "$MIDR" -i "$BOTL" -i "$BOTC" -i "$BOTR" -filter_complex "$parameters_3x3" -c:v "$mosaic_libVid" -b:v "$mosaic_bitRate" -sn -f "$fileType" -an -metadata title="$metadataTitle" -metadata comment="$metadataTitle"  -y -pass 2 "$metadataTitle.mosaic_3x3.1.$fileType"


	TOPL="input10.webm"
	TOPC="input11.webm"
	TOPR="input12.webm"
	MIDL="input13.webm"
	MIDC="input14.webm"
	MIDR="input15.webm"
	BOTL="input16.webm"
	BOTC="input17.webm"
	BOTR="input18.webm"

	#CREATE MOSAIC 3x3 2
	ffmpeg -i "$TOPL" -i "$TOPC" -i "$TOPR" -i "$MIDL" -i "$MIDC" -i "$MIDR" -i "$BOTL" -i "$BOTC" -i "$BOTR" -filter_complex "$parameters_3x3" -c:v "$mosaic_libVid" -b:v "$mosaic_bitRate" -sn -f "$fileType" -an -metadata title="$metadataTitle" -y -pass 1 "/dev/null"

	ffmpeg -i "$TOPL" -i "$TOPC" -i "$TOPR" -i "$MIDL" -i "$MIDC" -i "$MIDR" -i "$BOTL" -i "$BOTC" -i "$BOTR" -filter_complex "$parameters_3x3" -c:v "$mosaic_libVid" -b:v "$mosaic_bitRate" -sn -f "$fileType" -an -metadata title="$metadataTitle" -metadata comment="$metadataTitle"  -y -pass 2 "$metadataTitle.mosaic_3x3.2.$fileType"
fi



if $MOSAIC_3x1; then
#3x1
	TOP="input19.webm"
	MID="input20.webm"
	BOT="input21.webm"

	#CREATE MOSAIC 3x1
	ffmpeg -i "$TOP" -i "$MID" -i "$BOT" -filter_complex "$parameters_3x1" -c:v "$mosaic_libVid" -b:v "$mosaic_bitRate" -sn -f "$fileType" -an -metadata title="$metadataTitle" -y -pass 1 "/dev/null"

	ffmpeg -i "$TOP" -i "$MID" -i "$BOT" -filter_complex "$parameters_3x1" -c:v "$mosaic_libVid" -b:v "$mosaic_bitRate" -sn -f "$fileType" -an -metadata title="$metadataTitle" -y -pass 2 "$metadataTitle.mosaic_3x1.1.$fileType"
fi
fi