steffen-dotfiles/zsh/functions

# convert a video to mp4 + webm in one go for web
function webvideo() {
  ffmpeg -i $1 -acodec libvorbis -ac 2 -b:a 128k -ar 44100 -vcodec libvpx -pix_fmt yuv420p -r 25 -qmin 10 -qmax 42 -cpu-used 0 -quality best -b:v 2M -maxrate 2M -bufsize 4M -s 1280x720 $1.webm
  ffmpeg -i $1 -movflags +faststart -acodec libfdk_aac -ac 2 -b:a 128k -ar 44100 -vcodec libx264 -vprofile high -preset slower -pix_fmt yuv420p -r 25 -b:v 2M -maxrate 2M -bufsize 4M -s 1280x720 $1.mp4
}

function webvideohigh() {
  ffmpeg -i $1 -acodec libvorbis -ac 2 -b:a 160k -ar 44100 -vcodec libvpx -pix_fmt yuv420p -r 25 -qmin 10 -qmax 42 -cpu-used 0 -quality best -b:v 3M -maxrate 3M -bufsize 6M -s 1280x720 $1--high.webm
  ffmpeg -i $1 -movflags +faststart -acodec libfdk_aac -ac 2 -b:a 160k -ar 44100 -vcodec libx264 -vprofile high -preset slower -pix_fmt yuv420p -r 25 -b:v 3M -maxrate 3M -bufsize 6M -s 1280x720 $1--high.mp4
}

function webvideolow() {
  ffmpeg -i $1 -acodec libvorbis -ac 2 -b:a 96k -ar 44100 -vcodec libvpx -pix_fmt yuv420p -r 25 -qmin 10 -qmax 42 -cpu-used 0 -quality best -b:v 1M -maxrate 1M -bufsize 2M -s 1280x720 $1--low.webm
  ffmpeg -i $1 -movflags +faststart -acodec libfdk_aac -ac 2 -b:a 96k -ar 44100 -vcodec libx264 -vprofile high -preset slower -pix_fmt yuv420p -r 25 -b:v 1M -maxrate 1M -bufsize 2M -s 1280x720 $1--low.mp4
}

# convert a video to mp4 + webm in one go for web
function webvideonoaudio() {
  ffmpeg -i $1 -an -vcodec libvpx -pix_fmt yuv420p -r 25 -qmin 10 -qmax 42 -cpu-used 0 -quality best -b:v 2M -maxrate 2M -bufsize 4M -s 1280x720 $1--no-audio.webm
  ffmpeg -i $1 -movflags +faststart -an -vcodec libx264 -vprofile high -preset slower -pix_fmt yuv420p -r 25 -b:v 2M -maxrate 2M -bufsize 4M -s 1280x720 $1--no-audio.mp4
}

function webvideohighnoaudio() {
  ffmpeg -i $1 -an -vcodec libvpx -pix_fmt yuv420p -r 25 -qmin 10 -qmax 42 -cpu-used 0 -quality best -b:v 3M -maxrate 3M -bufsize 6M -s 1280x720 $1--high--no-audio.webm
  ffmpeg -i $1 -movflags +faststart -an -vcodec libx264 -vprofile high -preset slower -pix_fmt yuv420p -r 25 -b:v 3M -maxrate 3M -bufsize 6M -s 1280x720 $1--high--no-audio.mp4
}

function webvideolownoaudio() {
  ffmpeg -i $1 -an -vcodec libvpx -pix_fmt yuv420p -r 25 -qmin 10 -qmax 42 -cpu-used 0 -quality best -b:v 1M -maxrate 1M -bufsize 2M -s 1280x720 $1--low--no-audio.webm
  ffmpeg -i $1 -movflags +faststart -an -vcodec libx264 -vprofile high -preset slower -pix_fmt yuv420p -r 25 -b:v 1M -maxrate 1M -bufsize 2M -s 1280x720 $1--low--no-audio.mp4
}

# a small function for finding stuff
function fname() {
  find . -iname "*$@*";
}

# create and change to directory/folder
function take() {
  mkdir -p $1
  cd $1
}

# a function to get the current branch for git shortcuts etc
function current_branch() {
  ref=$(git symbolic-ref HEAD 2> /dev/null) || \
  ref=$(git rev-parse --short HEAD 2> /dev/null) || return
  echo ${ref#refs/heads/}
}

# easy vim/terminal switch
fancy-ctrl-z () {
  if [[ $#BUFFER -eq 0 ]]; then
    BUFFER="fg"
    zle accept-line
  else
    zle push-input
    zle clear-screen
  fi
}

# open changed files in git index
function gch () {
  nvim `git status | grep modified | awk '{print $3}'`
}

# creates an archive from given directory
mktar() { tar cvf  "${1%%/}.tar" "${1%%/}"; }
mktgz() { tar cvzf "${1%%/}.tgz" "${1%%/}"; }
mkzip() { zip -r   "${1%%/}"     "${1%%/}"; }

# easy extract
extract () {
  if [ -f $1 ] ; then
    case $1 in
      *.tar.bz2)   tar xvjf $1    ;;
      *.tar.gz)    tar xvzf $1    ;;
      *.bz2)       bunzip2 $1     ;;
      *.rar)       rar x $1       ;;
      *.gz)        gunzip $1      ;;
      *.tar)       tar xvf $1     ;;
      *.tgz)       tar xvzf $1    ;;
      *.tbz2)      tar xvjf $1    ;;
      *.tbz)       tar xvjf $1    ;;
      *.zip)       unzip $1       ;;
      *.Z)         uncompress $1  ;;
      *.7z)        7z x $1        ;;
      *)           echo "don't know how to extract '$1'..." ;;
    esac
  else
    echo "'$1' is not a valid file!"
  fi
}