- 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="$(get_minimum_timestamp "$infile" "audio")"
+ local videodelay="$(get_minimum_timestamp "$infile" "video")"
+ local videotrackid="$(get_track_id "$infile" "video")"
+
+ mkvmerge \
+ -o "${outfile}" \
+ --default-duration "${videotrackid}:${FORCEFPS}fps" \
+ --sync "${videotrackid}:$((videodelay / 1000000))" \
+ --no-audio "$infile" \
+ --sync "0:$((audiodelay / 1000000))" \
+ "$audiofile"