new (stubs of) scripts/ updated scripts

scripts/build_ffmpeg.sh

@@ -0,0 +1,7 @@
+cd /var/tmp/
+git clone https://aur.archlinux.org/ffmpeg-libfdk_aac.git
+cd ffmpeg-libfdk_aac/
+makepkg -csr
+pacman -Ud
+cd ..
+rm -r ffmpeg-libfdk_aac/

scripts/reencode_audio.sh

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+for file in ./*.$1; do
+   echo "ffmpeg -i '$file' -c:a copy -map 0:0 '../reencode/$file'";
+   ffmpeg -i "$file" -c:a copy -map 0:0 "../reencode/$file";
+done

scripts/reencode_m4a.sh.save

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+for file in ./*.m4a; do
+   map='';
+   if [[ $# > 0 && $1 == 'map' ]]; then
+      map='-map 0:0';
+   fi
+   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