Must run mkvMerge prior to ffmpeg to prevent errors on some files

[vorwd]

I found it works best to complete the mkvMerge-Eng-Only.sh script on the directory/file prior to calling one of the ffmpeg variants. This is due to the ffmpeg options/arguments I've chosen to call in the script. You may find better suited options to feed into ffmpeg which would prevent this sort of issue from occuring. I will work to update the chosen options, while still acheivng a successful outcome, if it becomes a hassle for me to trigger the scripts in this sequence.**

Error initializing output stream 0:3 -- Subtitle encoding currently only possible from text to text or bitmap to bitmap

What's strange about this error, is that my $map_audio_args should be excluding subtitles all together and the script should only be working on audio streams -- I did fiddle around with the jq outputs of ffprobe-original, which feeds into the $map_audio_args, but didn't resolve it yet

map_audio_args=()
for index in $eng_audio_streams; do
lang=$(echo "$ffprobe_output" | jq -r ".streams[] | select(.index == $index and .codec_type == "audio") | .tags.language")
if [ "$lang" == "eng" ]; then
map_audio_args+=("-map" "0:$index")
fi
done