Chance file modififaction date from filename (after moving the gallery on andriod from the device to the sd card)

gistfile1.txt

#Sources which helped:
# http://www.brunolinux.com/02-The_Terminal/Find_and%20Replace_with_Sed.html
# http://apple.stackexchange.com/questions/142538/read-creation-date-from-file-name-and-change-batch

#for all images with EXIF Infos
jead -ft *

#for all mp4 movies
for f in *.mp4; do
    t=$(echo $f | sed -E 's/_//g' | sed -E 's/.mp4//g' | sed 's/.\{2\}$//')
    touch -t $t "$f"
done

#for all whatsapp images. the time is missing, so all images with be set to 12:00 h
for f in IMG*.jpg; do
    t=$(echo $f | sed -E 's/IMG-//g' | sed -E 's/.jpg//g' | sed -E 's/-WA/1200/g' | sed 's/.\{4\}$//')
    touch -t $t "$f"
done

#same for whatsapp, but with JEPG
for f in IMG*.jpeg; do
    t=$(echo $f | sed -E 's/IMG-//g' | sed -E 's/.jpeg//g' | sed -E 's/-WA/1200/g' | sed 's/.\{4\}$//')
    touch -t $t "$f"
done