replaced/ updated scripts

scripts/reencode_m4a.sh

@@ -6,6 +6,16 @@ for file in ./*.m4a; do
    if [[ $# > 0 && $1 == 'map' ]]; then
       map='-map 0:0';
    fi
-   echo "ffmpeg -i '$file' -c:a copy $map -movflags +faststart '../reencode/$file'";
-   ffmpeg -i "$file" -c:a copy $map -movflags +faststart "../reencode/$file";
+   vbr='';
+   if [[ $# > 1 && $2 == 'vbr' ]]; then
+      vbr='libfdk_aac -profile:a aac_he -b:a 64k';
+   else
+      map="$map copy"
+   fi
+   dest=../reencode
+   if [[ !(-d $dest) ]]; then
+      mkdir $dest
+   fi
+   echo "ffmpeg -i '$file' -c:a $vbr $map -movflags +faststart '$dest/$file'";
+   ffmpeg -i "$file" -c:a $vbr $map -movflags +faststart "$dest/$file";
 done