/useful/trunk-1

#!/usr/bin/env bash

####

# FILE NAME: enc2firefox.sh

#

# Encodes (mp4/x264) videos so they can be played in firefox.

#

# Updates:

# 2020-09-05:

#   * Removed an eval that made no sense.

#   * Added FJ mode for those spicy memes.

#

# 2021-01-13:

#   * Fixed up if statments

#

####

__IN_NAME=

__OUT_NAME=

__USE_WEBM=false

__USE_FJ=false

__help () {

  echo "enc2firefox.sh -- Make Videos Playable in Firefox"

  echo " "

  echo "-i <input video file>     Input Video File."

  echo " "

  echo "-o <output video file>    Output Video File"

  echo "                          (.mp4 will be added to the end)."

  echo " "

  echo "-m                        output webm instead"

  echo "                          (Will change ending to .webm)."

  echo " "

  echo "-f                        Use FJ settings. Low bandwith, small size."

  echo "                          (Will append .mp4 to the end)."

  echo " "

  exit

}

__enc_mp4 () {

  ffmpeg -i "$__IN_NAME"\

            -c:v libx264\

            -preset slower\

            -crf 22\

            -pix_fmt yuv420p\

            -c:a aac\

            -b:a 128k\

            "$__OUT_NAME".mp4

}

__enc_fj () {

  ffmpeg -i "$__IN_NAME"\

            -c:v libx264\

            -preset slower\

            -pix_fmt yuv420p\

            -b:v 1024k\

            -s hd720\

            -r 30\

            -c:a aac\

            -b:a 128k\

            "$__OUT_NAME".mp4

}

__enc_webm () {

  ffmpeg -i "$__IN_NAME"\

            -c:v libvpx-vp9\

            -b:v 0\

            -crf 20\

            -c:a libopus\

            "$__OUT_NAME".webm

}

__parse_args() {

  if [[ -z "$1" ]]

  then

    echo "Try --help or -h."

    exit 1

  fi

  while [[ $# -gt 0 ]]

  do

    case "${1}" in

      -i)

      __IN_NAME="$2"

      shift

      shift

      ;;

      -o)

      __OUT_NAME="$2"

      shift

      shift

      ;;

      -m)

      __USE_WEBM=true

      shift

      ;;

      -f)

      __USE_FJ=true

      shift

      ;;

      -h|--help)

      __help

      shift

      ;;

      *)

      __help

      exit 1

      shift

      ;;

      --)

      shift

      break

      ;;

    esac

  done

}

__main () {

  if [[ ! -e "$__IN_NAME" ]]

  then

    echo "missing input audio. Please provide."

    exit 1

  fi

  if [[ $__OUT_NAME == "" ]]

  then

    echo "missing output file name. Please provide."

    exit 1

  fi

  if [[ $__USE_WEBM == true ]]

  then

    if [[ $__IN_NAME == $__OUT_NAME.webm ]]

    then

      echo "Filenames can't be the same."

      exit

    fi

    __enc_webm

  elif [[ $__USE_FJ == true ]]

  then

    if [[ $__IN_NAME == $__OUT_NAME.mp4 ]]

    then

      echo "Filenames can't be the same."

      exit

    fi

    __enc_fj

  else

    if [[ $__IN_NAME == $__OUT_NAME.mp4 ]]

    then

      echo "Filenames can't be the same."

      exit

    fi

    __enc_mp4

  fi

}

__parse_args "${@}"

__main