add script

eac3toac3.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+set -euo pipefail
+
+[ $# -eq 0 ] && echo "Parameter missing. Usage: $0 filename.mkv" && exit -1
+
+MKV_INPUT="$1"
+IFILE=$(basename "$MKV_INPUT")
+# extension="${FILE##*.}"
+IFILE="${IFILE%.*}"
+
+# get E-AC3 audio track ID from MKV container
+LINE=$(mkvinfo ${MKV_INPUT} | grep "Track type" | grep -n "audio" | cut -d":" -f1)
+AUDIO_ID=$(( $LINE - 1 ))
+
+# extract E-AC3 audio track from MKV container
+mkvextract tracks "$MKV_INPUT" ${AUDIO_ID}:"${IFILE}.eac3"
+
+# convert E-AC3 audio file to a standart AC3 file
+avconv -i "${IFILE}.eac3" -c:a ac3 "${IFILE}.ac3" -b 600k