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makeWebm() {
  FILE=$1
  DIMENSIONS=`$(ffmpeg -i ${FILE} 2>&1 | perl -lane 'print $1 if /([0-9]{2,}x[0-9]{2,})/')`
  SIZE=${3:-${DIMENSIONS}}

  CALCULATEDBITRATE=`ffprobe -show_streams -i ${FILE} | grep -m 1 "bit_rate" | sed 's|[^0-9]||g'`
  CALCULATEDBITRATE=`echo $((${CALCULATEDBITRATE} / 1024))`
  BITRATE=${2:-${CALCULATEDBITRATE}}

  FILENAME=${FILE%%.*}
  ffmpeg -i ${FILE} -acodec libvorbis -ac 2 -ab 96k -ar 44100 -b ${BITRATE}k -s ${SIZE} ${FILENAME}.webm
}

makeWebms() {
  for FILE in $(find . -name "*.mp4")
  do
    WIDTH=`ffprobe -show_streams -i ${FILE} | grep -m 1 "width" | sed 's|[^0-9]||g'`
    HEIGHT=`ffprobe -show_streams -i ${FILE} | grep -m 1 "height" | sed 's|[^0-9]||g'`
    DIMENSIONS="${WIDTH}x${HEIGHT}"

    BITRATE=`ffprobe -show_streams -i ${FILE} | grep -m 1 "bit_rate" | sed 's|[^0-9]||g'`
    BITRATE=`echo $((${BITRATE} / 1024))`

    FILE=`echo ${FILE} | sed 's|\.\/||g'`
    makeWebm "${FILE}" ${BITRATE} ${DIMENSIONS}
  done
}

makeWebm() {
  FILE=$1
  BITRATE=${2:-'3450'}
  SIZE=${3:-'1280x720'}
  FILENAME=${FILE%%.*}
  ffmpeg -i ${FILE} -acodec libvorbis -ac 2 -ab 96k -ar 44100 -b ${BITRATE}k -s ${SIZE} ${FILENAME}.webm
}

makeWebms() {
  BITRATE=${1:-'3450'}
  SIZE=${2:-'1280x720'}
  for file in $(find . -name "*.mp4"); do ffmpeg -i "$file" -acodec libvorbis -ac 2 -ab 96k -ar 44100 -b ${BITRATE}k -s ${SIZE} "${file/.mp4/.webm}"; done
}