local audiofile="$2"
local outfile="$3"
- local trackid="$(mkvmerge -i "$infile" | grep 'Track ID.*video' | sed 's/^Track ID \(.\):.*$/\1/')"
- mkvmerge -o "${outfile}" --default-duration "${trackid}:${FORCEFPS}fps" --no-audio "$infile" "$audiofile"
+ local audiodelay="$(get_audio_delay "$infile")"
+ local videotrackid="$(get_video_trackid "$infile")"
+
+ mkvmerge \
+ -o "${outfile}" \
+ --default-duration "${videotrackid}:${FORCEFPS}fps" \
+ --no-audio "$infile" \
+ --sync "0:$((audiodelay / 1000000))" \
+ "$audiofile"
+}
+
+function get_video_trackid {
+ mkvmerge -i "$1" | sed -n 's/Track ID \([0-9]*\): .*video.*/\1/p'
+}
+
+function get_audio_delay {
+ mkvmerge -F verbose-text -i "$1" | \
+ sed -n 's/Track ID [0-9]*: .*audio.*minimum_timestamp:\([0-9]*\).*/\1/p'
}
function encode_audio {
local outfile="$2"
local audiofile="${tmpdir}/audiofile.m4a"
- encode_audio "${infile}" "${audiofile}"
- mux_replace_audio "${infile}" "${audiofile}" "${outfile}"
+ encode_audio "$infile" "$audiofile"
+ mux_replace_audio "$infile" "$audiofile" "$outfile"
}