G'MIC Video Avg Command

gmic-video-avg

avg_video :
  -e[] "" -v - n=0 go=1
  -do
    -l[] -i "$1",$n,$n -if $! n+=1 -else go=0 -endif -onfail go=0 -endl
    -+
    -v + -e[] "\r - Image "$n"                    " -v -
  -while $go -/ $n -v +

avg_files :
  -e[] "" -v - files=${"-files \"$1\""} -arg2var _file,$files n=0 go=1
  -do
    -l[] -i ${_file{$n+1}} -if $! n+=1 -else go=0 -endif -onfail go=0 -endl
    -+
    -v + -e[] "\r - Image "$n"                    " -v -
  -while $go -/ $n -v +