批量将.ncm转换成.mp3、.flac文件

README.md

批量转换NCM文件

基于 magic-akari/ncmc

输入说明

• 保存目录通过NCM_SAVE_TO环境指定
• 输入参数支持.ncm文件或者文件夹
  • 文件夹可以嵌套多层的，程序会一层一层查找.ncm文件

NCM_SAVE_TO=~/Music ./convert.sh .

输出说明

例如歌曲Charlie Puth - Lipstick.ncm文件，会得到

• Charlie Puth - Lipstick.flac
• Charlie Puth - Lipstick.data/
  • Charlie Puth - Lipstick.comment
  • Charlie Puth - Lipstick.jpeg
  • Charlie Puth - Lipstick.key
  • Charlie Puth - Lipstick.ncm
  • Charlie Puth - Lipstick.json

这样目录结构的数据们。

convert.sh

#!/usr/local/bin/bash

# based on https://github.com/magic-akari/ncmc

declare -a musicexts
musicexts=(mp3 flac)

declare -a fileexts
fileexts=(comment key json jpeg jpg)

function process_single_ncm_file {
    filepath=$1
    filename=`basename "$filepath"`
    save_to_dir=$2

    if [ ! -e "$save_to_dir" ]; then
        mkdir -p "$save_to_dir"
    fi

    # 将源文件.ncm文件拷贝到save_to_dir
    mv "$filepath" "$save_to_dir"

    #
    filedirname=${filename/.ncm/.data}
    if [ -e "$save_to_dir/$filedirname" ]; then
        printf "dir '$filedirname' exists in '$save_to_dir'!\n"
        return 2
    fi
    mkdir "$save_to_dir/$filedirname"

    ncmc --dump "$save_to_dir/$filename" &> /dev/null
    # 这样生成的.mp3、.flac文件是没有metadata的

    filenamebase=${filename/.ncm/}

    for ext in ${fileexts[@]}; do
        if [ ! -e "$save_to_dir/$filenamebase.$ext" ]; then
            continue
        fi
        mv "$save_to_dir/$filenamebase.$ext" "$save_to_dir/$filedirname"
    done

    for ext in ${musicexts[@]}; do
        if [ -e "$save_to_dir/$filenamebase.$ext" ]; then
            rm "$save_to_dir/$filenamebase.$ext"
        fi
    done

    ncmc "$save_to_dir/$filename" &> /dev/null
    # 生成的.mp3、.flac文件有metadata
    mv "$save_to_dir/$filename" "$save_to_dir/$filedirname"
}

function process_single_dir {
    dirpath=$1
    save_to_dir=$2
    for entry in "$dirpath"/*; do
        if [ -f "$entry" ] && [[ "$entry" == *".ncm" ]]; then
            echo \[processing ncm file "'"$entry"'"\]
            process_single_ncm_file "$entry" "$save_to_dir"
            continue
        fi
        if [ -d "$entry" ]; then
            echo \[processing dir "'"$entry"'"\]
            process_single_dir "$entry" "$save_to_dir"
            continue
        fi
    done
}

save_to=""
if [[ "x$NCM_SAVE_TO" == "x" ]]; then
    save_to="." #当前目录
else
    save_to="$NCM_SAVE_TO"
fi

for entry in "$@"; do

    if [ -d "$entry" ]; then
        echo \[processing dir "'"${entry%*/}"'"\]
        process_single_dir ${entry%*/} "$save_to"
        continue
    fi
    # 直接给的ncm文件
    if  [ -f "$entry" ] && [[ "$entry" != *".ncm" ]]; then
        printf "'$filename' is not a .ncm file!\n"
        continue
    fi
    echo \[processing "'$entry'"\]
    process_single_ncm_file "$entry" .
    status="$?"
    if [[ "$status" == "2" ]]; then
        continue
    fi
done

exit 0