ffmpegで動画の撮影日時を保ったまま画素数を増やすスクリプト

pixel_number_times_2.bash

mkdir mp4 -p
for file in `/bin/ls -r *.3G2`; do
  datetime=`ffprobe -v quiet $file -print_format csv -show_entries format_tags=creation_time|cut -d ',' -f 2`
  datetime_iso=`date --iso-8601=minutes -d "${datetime}+00:00"`
  ffmpeg -i  ${file}  -metadata creation_time=$datetime_iso -strict -2   mp4/${file%.*}.mp4   -s 640x480 -y
  touch -d $datetime_iso  mp4/${file%.*}.mp4
done;