JAVE

转自 http://ajava.org/opens/dmtzj/10094.html

 

 

JAVE (Java Audio Video Encoder) 类库是一个 ffmpeg 项目的 Java 语言封装。开发人员可以使用JAVE 在不同的格式间转换视频和音频。例如将 AVI 转成 MPEG 动画，等等 ffmpeg 中可以完成的在 JAVE 都有对应的方法。

 

下面例子将 AVI 动画转成 FLV 格式：

 

File source = new File("source.avi");

File target = new File("target.flv");

AudioAttributes audio = new AudioAttributes();

audio.setCodec("libmp3lame");

audio.setBitRate(new Integer(64000));

audio.setChannels(new Integer(1));

audio.setSamplingRate(new Integer(22050));

VideoAttributes video = new VideoAttributes();

video.setCodec("flv");

video.setBitRate(new Integer(160000));

video.setFrameRate(new Integer(15));

video.setSize(new VideoSize(400, 300));

EncodingAttributes attrs = new EncodingAttributes();

attrs.setFormat("flv");

attrs.setAudioAttributes(audio);

attrs.setVideoAttributes(video);

Encoder encoder = new Encoder();

encoder.encode(source, target, attrs);

 

Next example takes an audio WAV file and generates a 128 kbit/s, stereo, 44100 Hz MP3 file:

 

File source = new File("source.wav");

File target = new File("target.mp3");

AudioAttributes audio = new AudioAttributes();

audio.setCodec("libmp3lame");

audio.setBitRate(new Integer(128000));

audio.setChannels(new Integer(2));

audio.setSamplingRate(new Integer(44100));

EncodingAttributes attrs = new EncodingAttributes();

attrs.setFormat("mp3");

attrs.setAudioAttributes(audio);

Encoder encoder = new Encoder();

encoder.encode(source, target, attrs);

 

 

项目主页： http://www.sauronsoftware.it/projects/jave/

文档地址： http://www.sauronsoftware.it/projects/jave/manual.php

下载地址： http://www.sauronsoftware.it/projects/jave/download.php

 

 

 

 

实例：

import it.sauronsoftware.jave.AudioAttributes;
import it.sauronsoftware.jave.Encoder;
import it.sauronsoftware.jave.EncoderProgressListener;
import it.sauronsoftware.jave.EncodingAttributes;
import it.sauronsoftware.jave.MultimediaInfo;

import java.io.File;

public class JAVE {

	public static void main(String args[]) {
		wav2mp3("source.wav", "target.mp3", 320000);
		mp32mp3("target.mp3", "target1.mp3", 192000);
		mp32wav("target1.mp3", "source1.wav");
	}

	public static void wav2mp3(String src, String dst, int bitrate) {
		try {
			File source = new File(src);
			File target = new File(dst);
			AudioAttributes audio = new AudioAttributes();
			audio.setCodec("libmp3lame");
			audio.setBitRate(bitrate);
			// audio.setChannels(1);
			// audio.setSamplingRate(48000);
			EncodingAttributes attrs = new EncodingAttributes();
			attrs.setFormat("mp3");
			attrs.setAudioAttributes(audio);
			Encoder encoder = new Encoder();
			encoder.encode(source, target, attrs, new MyProgressListener());
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	public static void mp32wav(String src, String dst) {
		try {
			File source = new File(src);
			File target = new File(dst);
			AudioAttributes audio = new AudioAttributes();
			// audio.setChannels(1);
			// audio.setSamplingRate(48000);
			EncodingAttributes attrs = new EncodingAttributes();
			attrs.setFormat("wav");
			attrs.setAudioAttributes(audio);
			Encoder encoder = new Encoder();
			encoder.encode(source, target, attrs, new MyProgressListener());
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	public static void mp32mp3(String src, String dst, int bitrate) {
		try {
			File source = new File(src);
			File target = new File(dst);
			AudioAttributes audio = new AudioAttributes();
			audio.setCodec("libmp3lame");
			audio.setBitRate(bitrate);
			// audio.setChannels(1);
			// audio.setSamplingRate(48000);
			EncodingAttributes attrs = new EncodingAttributes();
			attrs.setFormat("mp3");
			attrs.setAudioAttributes(audio);
			Encoder encoder = new Encoder();
			encoder.encode(source, target, attrs, new MyProgressListener());
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}

class MyProgressListener implements EncoderProgressListener {

	/**
	 * This method is called before the encoding process starts, reporting
	 * information about the source stream that will be decoded and re-encoded.
	 * 
	 * @param info
	 *            Informations about the source multimedia stream.
	 */
	public void sourceInfo(MultimediaInfo info) {
		System.out.println(info);
	}

	/**
	 * This method is called to notify a progress in the encoding process.
	 * 
	 * @param permil
	 *            A permil value representing the encoding process progress.
	 */
	public void progress(int permil) {
		System.out.printf("\r%d%%", permil / 10);
	}

	/**
	 * This method is called every time the encoder need to send a message
	 * (usually, a warning).
	 * 
	 * @param message
	 *            The message sent by the encoder.
	 */
	public void message(String message) {
		System.out.println("\n\n" + message);
	}
}

 

 

 

评论

1 楼 zhaoleiJE 2012-11-30  

public static String toMPTree(String sourcePath,String targetPath) throws IllegalArgumentException, InputFormatException, EncoderException{
		File source = new File(sourcePath);  
		File target = new File(targetPath);
		AudioAttributes audio = new AudioAttributes();  
		audio.setCodec("libmp3lame");  
		audio.setBitRate(new Integer(128000));  
		audio.setChannels(new Integer(2));  
		audio.setSamplingRate(new Integer(44100));  
		EncodingAttributes attrs = new EncodingAttributes();  
		attrs.setFormat("mp3");  
		attrs.setAudioAttributes(audio);
		Encoder encoder = new Encoder();  
		encoder.encode(source, target, attrs);
		return targetPath;
	}

linux转的mp3都是0字节