create-mkv.sh

#!/bin/bash

for i in 05/*mp4; do
    srt="${i/.mp4/.en.srt}"
    [ -e "$srt" ] || continue
    mkvmerge -o "out/${i/.mp4/.mkv}"  "--forced-track" "0:no" "-s" "0" "-D" "-A" "-T" "--no-global-tags" "--no-chapters" "(" "$srt" ")" "--forced-track" "0:no" "--forced-track" "1:no" "-a" "1" "-d" "0" "-S" "-T" "--no-global-tags" "--no-chapters" "(" "$i" ")" "--track-order" "0:0,1:0,1:1"
done