adrepeater.sh

#!/bin/bash

# Script to repeatly convert avi into a different format (according the setting
# saved) I used MP4 for my own use.
# Next would be improved to add argument parsing on the CLI line.

usage() {
   echo ' Program [-i dir] [-o dir] [-t ext] [-f file]
[-i <directory>] directory to scan for files to be processed
              If none will work on the current directory
[-o <directory>] directory to save the processed files
                 If none will work on the current directory
[-t <list of extensions>]
                 a list of file type to be search by their extension and loaded.
                 Just mention the word after the dot (i.e. avi mkv) and strictly
                 comma separated. If none, the default will go for avi.
[-f <setting>]   the full path of avidemux setting that will use to convert the
                 input file (i.e. mp4.js). This might affect the file extension
                 type which is defaulted to mp4.
                 Other extension types and particular command line specification,
                 must specify into the loading setting. Only the first valid
                 statement will get in force.
                 One line in the setting must contain "#! extension =" and the
                 type of extension you want to have on the output file(s).
                 (quotes excluded! case sensitive)
                 One line in the setting would contain "#! specification ="
                 and the type of command line parameter you want to add there.
                 (quotes excluded! case sensitive)
                 This is worth in a non GUI environment, but it might be valid
                 to code with ECMAScript type.
[-log]           a file to save the on screen output. If none, all discarted
All are optional. Defaults as explained, Free option positioning '
exit 255
}
question() {
   while getopts ":i:o:t:f:l:h" Option; do
     case $Option in
       i ) DIR=$OPTARG ;;
       o ) OUTD=$OPTARG ;;
       t ) read_type $OPTARG;;
       f ) get_format $OPTARG;;
       l ) LOG=$OPTARG;;
       h ) usage ;;
       * ) usage ;;
     esac
   done
}

read_type() {
   # Read a list of extensions and return al list of the files in the given
   # directory
   local list=''
   list=$(echo $1 |sed 's/\(\,\)/|/g')
   #set the list to what has been found
   LIST=$(search_by_ext $list 'extend')
}

get_format() {
   # Load avidemux setting file and extract the wanted file extension
   if ! [ -e $1 ]; then # Not found ? Quit
      echo 'No setting file found, exiting'
      echo ''
      usage
   fi
   local _line
   _line=$(grep -m1 "^#! extension" $1)
   [ ${#_line} -gt 0 ] && EXT=${_line/'#! extension'/} | sed s/\[\ =\]//g
   _line=$(grep -m1 "^#! specification" $1)
   [ ${#_line} -gt 0 ] && SPECS=${_line/'#! specification'/} | sed s/\[\ =\]//g
}
avail_space(){
   # calculate the available space for a given directory and check if there's
   # double the size of the give file. If enough space will return 1
   dirspace=$(df -B1 $1| awk 'END{print $4}')
   filesize=$(($(ls -l $2 | awk '{print $5}')*2))
   [ $dirspace -gt $filesize ] && return 1
   return 0
}
search_by_ext() {
   local _m='' pre='' post='' lang=$LANG
   # setting LANG to english for  parsing the result
   LANG=en_US
   # if we use extended options we can add globbing
   [ $# == 2 ] &&
   if [ $2 == 'extend' ]; then
      shopt -s extglob
      pre='?('
      post=')'
   fi
   #Filtering some possible error
   m=$(ls $DIR/*.$pre$1$post 2>&1)
   # Restore locale language
   LANG=$lang
   # if avi files are found  it returns a list
   [ $(echo $m | grep -c1 'ls: cannot access') == '0' ] && return $m
}

# Save the separator and use only newline termination
ifs=$IFS
DIR=$PWD
#strip last / if it's there
if [ ${DIR:((${#DIR}-1))} == '/' ]; then
   DIR=${DIR::-1}
fi
SPECS='--force-alt-h264'
EXT='.mp4'
FORMAT=~/.avidemux/jobs/avi2mp4-2.js
LOG=/dev/null
# Default to avi
LIST=$(search_by_ext 'avi')
#read all the arguments on the command line
question $@
# Verify a valid directory
if ! [ -d $DIR ]; then
   echo $DIR' is not a valid directory'
   exit 1
fi
# it scans for all types of file inside the directory
if [ ${#LIST} -gt 0 ]; then
   # chance separator to new line
   IFS='
'
   for FIL in $LIST; do
      # It will quit in case no space to finish
      # we could remove the avi file once is done, but just leave it for inspecting
      # the result.
      avail_space $DIR $FIL # check for space
      if [ $? != '1' ]; then
         echo "No more space available on the destination directory "$DIR
         break
      fi
      # Saving the file into the origin directory
      DEST=$OUTD${FIL%.*}.$EXT
      # The script would be for mp4 conversion. Remember to tick auto unpacking VBR
      [ -f $DEST ] && echo  $DEST' exists, skipping' && continue
      avidemux2_cli $SPECS --load "$FIL" --run $FORMAT --save $DEST >> $LOG
   done
   avidemux2_cli --quit
else
   echo 'no files to process'
fi
IFS=$ifs