user/mp4_make480.sh

   1 #!/bin/bash
   2 # Desc: Reëncodes .mp4 videos in a specified directory.
   3 # Usage: mp4_make480.sh [dir]
   4 # Output: dir   ./out/
   5 #         file  ./out/[files]_480.mp4
   6 # Version: 0.0.1
   7
   8 dir_in="$1";
   9 dir_out="./out";
  10 if [[ $# -ne 1 ]]; then echo "FATAL:No dir specified." 1>&2; exit 1; fi;
  11 if [[ ! -d "$dir_in" ]]; then echo "FATAL:Not a dir:$dir_in" 1>&2; exit 1; fi;
  12 mkdir -p "$dir_out";
  13 declare -p dir_in dir_out;  # debug
  14
  15 while read -r line; do
  16     path_out=./"$dir_out"/"${line%.mp4}"_480.mp4;
  17     declare -p line path_out;  # debug
  18     ffmpeg -nostdin -i "$dir_in" -vf "scale=-2:480" -c:a copy "$path_out";
  19 done < <(find . -mindepth 1 -maxdepth 1 -type f -name "*.mp4")