Rotate mp4 video 90* (by default) clockwise via ffmpeg

rotate.sh

#!/bin/bash

TMP_PATH="/tmp/rotating-vids" 

# Provide path to source directory
ARG_DIRECTORY="${1:-.}" 
# Transposition settings, default 90 deg clockwise
TRANSPOSE="${2:-1}"

DIR=$(dirname $ARG_DIRECTORY)
VIDEOS=$(find $DIR -type f -name "*.MP4" -print0 | xargs -r0)

mkdir -p $TMP_PATH

echo "directory: $DIR"
echo "transcoding: "

for video in $VIDEOS; do
    ffmpeg -i $video -vf "transpose=$TRANSPOSE" "$TMP_PATH/rotated-$(basename $video)"
    echo "file $(basename $i) transcoded ($TMP_PATH/rotated-$(basename $video))"
done

mv $TMP_PATH/* $DIR

rm -r $TMP_PATH