ARM文件转MP3格式.md

window

下载jave-1.0.2.jar

核心代码如下

public static void changeToMp3(String sourcePath, String targetPath) {  
        File source = new File(sourcePath);  
        File target = new File(targetPath);  
        AudioAttributes audio = new AudioAttributes();  
        Encoder encoder = new Encoder();  
        audio.setCodec("libmp3lame");  
        EncodingAttributes attrs = new EncodingAttributes();  
        attrs.setFormat("mp3");  
        attrs.setAudioAttributes(audio);  
        try {  
            encoder.encode(source, target, attrs);  
        } catch (IllegalArgumentException e) {  
            e.printStackTrace();  
        } catch (InputFormatException e) {  
            e.printStackTrace();  
        } catch (EncoderException e) {  
            e.printStackTrace();  
        } 
    }

LINUX下

需要安装ffmpeg环境

安装命令如下

1. 首先安装系统编译环境

 yum install -y automake autoconf libtool gcc gcc-c++  #CentOS

2. 编译所需源码包

#yasm：汇编器，新版本的ffmpeg增加了汇编代码
wget http://www.tortall.net/projects/yasm/releases/yasm-1.3.0.tar.gz
tar -xzvf yasm-1.3.0.tar.gz
cd yasm-1.3.0
./configure
make
make install
 
#lame：Mp3音频解码
wget http://jaist.dl.sourceforge.net/project/lame/lame/3.99/lame-3.99.5.tar.gz
tar -xzvf lame-3.99.5.tar.gz
cd lame-3.99.5
./configure
make
make install
 
#amr支持
wget http://downloads.sourceforge.net/project/opencore-amr/opencore-amr/opencore-amr-0.1.3.tar.gz
tar -xzvf opencore-amr-0.1.3.tar.gz
cd opencore-amr-0.1.3
./configure
make
make install
 
 #amrnb支持
wget http://www.penguin.cz/~utx/ftp/amr/amrnb-11.0.0.0.tar.bz2
tar -xjvf amrnb-11.0.0.0.tar.bz2
cd amrnb-11.0.0.0
./configure
make
make install
 
#amrwb支持
wget http://www.penguin.cz/~utx/ftp/amr/amrwb-11.0.0.0.tar.bz2
tar -xjvf amrwb-11.0.0.0.tar.bz2
cd amrwb-11.0.0.0
./configure
make
make install
 
 #ffmpeg
wget http://ffmpeg.org/releases/ffmpeg-2.5.3.tar.bz2
tar -xjvf ffmpeg-2.5.3.tar.bz2
cd ffmpeg-2.5.3
./configure --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-version3 --enable-shared
make
make install
 
 #加载配置

vi /etc/ld.so.conf

在文件末尾加上：安装目录 例如 /usr/local/lib
执行命令：ldconfig
执行ffmpeg

3.使用方法
	ffmpeg -i 1.amr 1.mp3            #AMR转换MP3

核心代码

public static void amrToMP3Linux(String localPath, String targetFilePath){
		log.info("执行命令开始");
        String command = "ffmpeg -i "+localPath+" "+targetFilePath;
        log.info("the command is : "+command);
        Runtime runtime = Runtime.getRuntime();
        try {
            Process proc = runtime.exec(command);
            InputStream stderr = proc.getErrorStream();
            InputStreamReader isr = new InputStreamReader(stderr);
            BufferedReader br = new BufferedReader(isr);
            String line = null;
            StringBuffer sb = new StringBuffer();
            while ((line = br.readLine()) != null)
                sb.append(line);
            int exitVal = proc.waitFor();
            log.info("the exitVal is : "+exitVal);
        } catch (IOException e) {
            e.printStackTrace();
        } catch (InterruptedException e) {
            log.info("ffmpeg exec cmd Exception " + e.toString());
        }
        log.info("执行命令结束");
    }