Transcode video files to Apple-compatible HEVC using ffmpeg

transcode.sh

if [[ -d "$1" ]]; then
    for file in "$1"/**/*(.); do
        ext="${file##*.}"

        if [[ $ext == "mkv" ]] || [[ $ext == "mp4" ]] || [[ $ext == "avi" ]]; then
            transcode "$file"
        fi
    done

    trash "$1"
elif [[ -f "$1" ]]; then
    orig="$1"
    ext="${orig##*.}"
    base=$(basename $orig $ext)
    # sub="${orig%.*}.srt"
    # sub=$(printf %q $sub) # /Users/ullr/Movies/Downloads/Vikings\ S01/Vikings\ -\ S01E08.srt
    out="$(pwd)/${base}mp4"

    vtest=$(ffprobe -v error -select_streams v:0 -show_entries stream=codec_name -of default=noprint_wrappers=1:nokey=1 $orig)
    atest=$(ffprobe -v error -select_streams a:0 -show_entries stream=codec_name -of default=noprint_wrappers=1:nokey=1 $orig)

    vcodec="-c:v libx265 -crf 23"
    acodec="-c:a eac3 -b:a 320k"
    # subcmd=""

    if [[ $vtest == "hevc" ]]; then
        vcodec="-c:v copy"
    fi

    if [[ $atest == "eac3" ]]; then
        acodec="-c:a copy"
    fi

    # if [[ -f $sub ]]; then
    #     subcmd="-i $sub -c:s mov_text -metadata:s:s:0 language=eng"
    # fi

    ffmpeg -i "$orig" -metadata:s:a:0 language=eng -metadata:s:a:0 title="ENG" ${=vcodec} ${=acodec} -tag:v hvc1 "$out"        
    trash "$orig"
fi