ffmpeg-convert-multiple-files.sh

#!/bin/bash

STARTFOLDER="./"
MARKER="converted"

echo -n "Finding candidate files .."
FILELIST=$(find "$STARTFOLDER" -type f -name '*.mp4')
echo ".. "$(echo -e "$FILELIST" | wc -l)" found"

while read FILEPATH; do
  # A bit of healthy paranoia
  test -z "$FILEPATH" && continue
  test -f "$FILEPATH" || continue
  echo -n "Working on $FILEPATH .."

  # New file name
  BN=$(basename "$FILEPATH" '.mp4')
  BP=$(dirname "$FILEPATH")
  NEWFILEPATH="$BP/$BN-$MARKER.mp4"

  # Skip result files
  ISRESULT=$(echo "$BN" | grep -e "$MARKER\\.mp4\$")
  if test -n "$ISRESULT"; then
    echo "..  skipping (is a result file)"
    continue
  fi

  # Skip processed files
  if test -f "$NEWFILEPATH"; then
    echo "..  skipping (result file exists)"
    continue
  fi

  # Process
  echo -n ".. running ffmpeg .."
  RES=$(ffmpeg -i "$FILEPATH" -vcodec h264 -acodec aac "$NEWFILEPATH" </dev/null 2>&1)
  echo ".. done (exit code $?)"

done < <(echo -e "$FILELIST")