concatenate_copy.sh

preset="-c:v h264 -crf 18 -preset veryslow"
width=640
height=1136
audiorate=44100
output="output.ts"

rm -rf processed $output
mkdir processed

pad_vertical() {
    for i in `ls *.mp4`
    do
        out=$(ffmpeg -i $i -c copy -map 0:a /dev/null 2>&1)
        if [[ $out = *"no streams"* ]]; then
            ffmpeg -i $i -y -f lavfi -t 999 -i anullsrc=channel_layout=mono:sample_rate=44100 -shortest -c:v copy -c:a aac -map 0:v -map 1:a processed/$i.ts
	else
	    ffmpeg -i $i -y -c copy processed/$i.ts
        fi
    done
}

pad_images() {
    time=3
    for i in `ls *.jpg`
    do
        ffmpeg \
         -loop 1 -framerate 30 -t $time -i $i \
         -f lavfi -t $time -i anullsrc=channel_layout=mono:sample_rate=$audiorate -c:a aac \
         -vf scale=-2:$height,setsar=1:1 \
         $preset -pix_fmt yuv420p -profile:v main \
         -n processed/$i.ts
    done;
}

pad_vertical
pad_images

cat processed/*.ts > $output

del_previews.sh

ls=`ls -l`
count=`echo "$ls" | wc -l`

for i in `seq 1 $count`
do
    first=`echo "$ls" | head -n $i | tail -1 | awk '{print $9}'`
    second=`echo "$ls" | head -n $((i+1)) | tail -1 | awk '{print $9}'`
    first_t=`echo "$ls" | head -n $i | tail -1 | awk '{print $8}'`
    second_t=`echo "$ls" | head -n $((i+1)) | tail -1 | awk '{print $8}'`
    first_size=`echo "$ls" | head -n $i | tail -1 | awk '{print $5}'`
    second_size=`echo "$ls" | head -n $((i+1)) | tail -1 | awk '{print $5}'`

    if [[ "$first_t" == "$second_t" && "`echo $first | egrep -o '\.\w{3}'`" == ".mp4" && "`echo $second | egrep -o '\.\w{3}'`" == ".jpg" ]]
    then
	rm $second
    fi
    if [[ "$first_size" == "$second_size" ]]
    then
	rm $second
    fi
done

stories_concatenate.sh

preset="-crf 18 -preset veryslow"
width=1514
height=852
pad=517 #$[($width−480)/2]
audiorate=48000
output="output.mp4"

rm -rf processed $output
mkdir processed

pad_horizontal() {
for i in `ls *.hmp4`
    do
        ffmpeg \
         -f mp4 \
         -i $i \
         -vf transpose=2,scale=$width:$height,setsar=1:1 \
         $preset \
         -ar $audiorate \
         -y processed/$i.mp4
    done;
}

pad_vertical() {
    for i in `ls *.mp4`
    do
        ffmpeg \
         -i $i \
         -vf scale=-2:$height,pad=$width:$height:$pad:0,setsar=1:1 \
         $preset \
         -ar $audiorate \
         -y processed/$i
    done;
}

pad_images() {
    time=4
    for i in `ls *.jpg`
    do
        ffmpeg \
         -loop 1 -framerate 30 -t $time -i $i \
         -f lavfi -t $time -i anullsrc=channel_layout=mono:sample_rate=$audiorate \
         -vf scale=-2:$height,pad=$width:$height:$pad:0,setsar=1:1 \
         $preset \
         -y processed/$i.mp4
    done;
}

pad_horizontal
pad_vertical
pad_images

printf "file '%s'\n" processed/*.mp4 > mylist.txt
ffmpeg -f concat -safe 0 -i mylist.txt -fflags +genpts -c copy -y $output