使用JAVE转换视频格式以及获取视频某帧作为图片

官网下载jar包：http://www.sauronsoftware.it/projects/jave/manual.php
我下载版本是：jave-1.0.2.zip

转flv：

public static void main(String[] args) {
		File source = new File("E:\\test\\source.mp4");
		File target = new File("E:\\test\\target.flv");// 转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");// 转flv
		video.setBitRate(new Integer(180000));// 180kb/s比特率
		video.setFrameRate(new Integer(1));// 1f/s帧频，1是目前测试比较清楚的，越大越模糊
		EncodingAttributes attrs = new EncodingAttributes();
		attrs.setFormat("flv");// 转flv
		attrs.setAudioAttributes(audio);
		attrs.setVideoAttributes(video);
		Encoder encoder = new Encoder();
		long beginTime = System.currentTimeMillis();
		try {
			// 获取时长
			MultimediaInfo m = encoder.getInfo(source);
			long sTime = m.getDuration();
			long minute = sTime / 60000;
			long second = (sTime % 60000) / 1000;
			System.out.println("视频时长：" + minute + ":" + (second < 10 ? "0" + second : second));
			System.out.println("获取时长花费时间是：" + (System.currentTimeMillis() - beginTime));
			beginTime = System.currentTimeMillis();
			encoder.encode(source, target, attrs);
			System.out.println("视频转码花费时间是：" + (System.currentTimeMillis() - beginTime));
		} catch (IllegalArgumentException e) {
			e.printStackTrace();
		} catch (InputFormatException e) {
			e.printStackTrace();
		} catch (EncoderException e) {
			e.printStackTrace();
		}
	}

转MP4：

public static void main(String[] args) {
		File source = new File("E:\\test\\source.avi");
		File target = new File("E:\\test\\target.mp4");// 转MP4

		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("libxvid");// 转MP4
		video.setBitRate(new Integer(180000));// 180kb/s比特率
		video.setFrameRate(new Integer(1));// 1f/s帧频，1是目前测试比较清楚的，越大越模糊
		EncodingAttributes attrs = new EncodingAttributes();
		attrs.setFormat("mp4");// 转MP4
		attrs.setAudioAttributes(audio);
		attrs.setVideoAttributes(video);
		Encoder encoder = new Encoder();
		long beginTime = System.currentTimeMillis();
		try {
			// 获取时长
			MultimediaInfo m = encoder.getInfo(source);
			System.out.println(m.getDuration());
			System.out.println("获取时长花费时间是：" + (System.currentTimeMillis() - beginTime));
			beginTime = System.currentTimeMillis();
			encoder.encode(source, target, attrs);
			System.out.println("视频转码花费时间是：" + (System.currentTimeMillis() - beginTime));
		} catch (IllegalArgumentException e) {
			e.printStackTrace();
		} catch (InputFormatException e) {
			e.printStackTrace();
		} catch (EncoderException e) {
			e.printStackTrace();
		}
	}

获取某一帧作为png图片：

public static void main(String[] args) {
		File source = new File("E:\\test\\flex.avi");
		File target = new File("E:\\test\\target.png");//转图片
		
		VideoAttributes video = new VideoAttributes();
		video.setCodec("png");//转图片
		video.setSize(new VideoSize(600, 500));
		EncodingAttributes attrs = new EncodingAttributes();
		attrs.setFormat("image2");//转图片
		attrs.setOffset(3f);//设置偏移位置，即开始转码位置（3秒）
		attrs.setDuration(0.01f);//设置转码持续时间（1秒）
		attrs.setVideoAttributes(video);
		Encoder encoder = new Encoder();
		long beginTime = System.currentTimeMillis();
		try {
			//获取时长
			 MultimediaInfo m = encoder.getInfo(source);
			 System.out.println(m.getDuration());
			 System.out.println("获取时长花费时间是：" + (System.currentTimeMillis() - beginTime));
			 beginTime = System.currentTimeMillis();
			encoder.encode(source, target, attrs);
			System.out.println("视频转码花费时间是：" + (System.currentTimeMillis() - beginTime));
		} catch (IllegalArgumentException e) {
			e.printStackTrace();
		} catch (InputFormatException e) {
			e.printStackTrace();
		} catch (EncoderException e) {
			e.printStackTrace();
		}
	}

从官网下载的帮助文档中可以看到有很多编码格式，以此类推，相信可以转成你想要的格式