copy all files in test folder
# to rename all jpeg
jhead -nPXL_%Y%m%d_%H%M%S *.jpg
# do only mp4 as jpeg is better to be done by jhead
exiftool -d 'PXL_%Y%m%d_%H%M%S.%%e' '-FileName<filemodifydate' *.mp4
# sources are at https://gist.github.com/romani/e2358e3c1dece784fae9fe19be0fd143
./split-img.sh
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# sometimes required to https://gist.github.com/romani/862f33b98eb05060245ef864115ee66f
./move-portrait.sh
in case re-split, source of wisdom:
find . -type f -mindepth 2 -exec mv -i -- {} . \;