Ultimate FFMPEG h.265 script

#!/bin/bash
CRF="${CRF:-23}"
BITRATE="${BITRATE:-96k}"
SUB_CHARSET="${SUB_CHARSET:-cp1251}"
SUB_LANG="${SUB_LANG:-rus}"
SUB_FORMAT="${SUB_FORMAT:-mov_text}"
VID_FORMAT="${VID_FORMAT:-mp4}"
PARAMS="$PARAMS"

TELEGRAM() {
    [ -z "${TG_TOKEN:+x}" ] && echo "$1" && return 0
    curl -sL -G --data-urlencode "token=$TG_TOKEN" --data-urlencode "text=$1" https://ewh.mcmodder.ru/send.php 2>&1 >/dev/null
}

CONVERT_SUBS() {
    ffmpeg -i "$1" -sub_charenc "$SUB_CHARSET" -i "${1%.*}.srt" -metadata:s:1 "language=$SUB_LANG" -map 0:v -map 0:a -map 0:s\? -map 1:s\? -c:v libx265 -crf $CRF -c:a libopus -b:a $BITRATE -c:s "$SUB_FORMAT" -ac 2 $PARAMS "out/${1%.*}.$VID_FORMAT"
}

CONVERT() {
    ffmpeg -i "$1" -map 0:v -map 0:a -map 0:s\? -c:v libx265 -crf $CRF -c:a libopus -b:a $BITRATE -c:s copy -ac 2 $PARAMS "out/${1%.*}.$VID_FORMAT"
}

GETSIZE() {
    du -h "$1" | cut -f1
}

TELEGRAM "Started"
mkdir out
for videofile in "$@"; do
    if [ -f "${videofile%.*}.srt" ]; then
        CONVERT_SUBS "$videofile"
    else
        CONVERT "$videofile"
    fi
    TELEGRAM "Converted \`$videofile\` from *$(GETSIZE "$videofile")* to *$(GETSIZE "out/${videofile%.*}.$VID_FORMAT")*"
done
TELEGRAM "All done!"