set -xe
FORCEFPS="24"
-SLOWFILTER="-filter asetrate=46080,aresample=48000"
+SLOWFILTER="-filter asetrate=46080,aresample=osr=48000:resampler=soxr"
function mux_replace_audio {
local infile="$1"
mkvmerge -o "${outfile}" --default-duration "${trackid}:${FORCEFPS}fps" --no-audio "$infile" "$audiofile"
}
-function extract_audio {
- local infile="$1"
- local outfile="$2"
-
- mplayer \
- -noconfig all \
- -novideo \
- -channels 8 \
- -dumpaudio \
- -dumpfile "$outfile" \
- "$infile"
-}
-
function encode_audio {
ffmpeg \
-i "$1" \
+ -vn \
$SLOWFILTER \
- -strict experimental \
+ -c:a libfdk_aac -vbr 3 \
"$2"
}
function convert_file {
local infile="$1"
local outfile="$2"
- local audio1="${tmpdir}/audio1.ac3"
- local audio2="${tmpdir}/audio2.m4a"
+ local audiofile="${tmpdir}/audiofile.m4a"
- extract_audio "${infile}" "${audio1}"
- encode_audio "${audio1}" "${audio2}"
- mux_replace_audio "${infile}" "${audio2}" "${outfile}"
+ encode_audio "${infile}" "${audiofile}"
+ mux_replace_audio "${infile}" "${audiofile}" "${outfile}"
}