java 视频转换，将所有上传的视频类型转为mp4

用眼神瞬杀你 2015-05-21 03:31:14

java 视频转换，将所有上传的视频类型转为mp4，求大神解决

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疯狂的熊猫Npe 2018-10-10

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楼上的你难道一直没发现你这种压缩方式上传到服务器上视频无法播放么

x业精于勤x 2017-02-13

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要看楼主用啥方式了，ffmepg是可以，不过通过java调用性能很低，我推荐一种 java原生的方式，需要引入jave-1.0.2.jar


File source = new File("C:\\Users\\xfy\\desktop\\工作文档\\2817\\test.avi");  
File target = new File("C:\\Users\\xfy\\desktop\\工作文档\\2817\\test__001.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);  
  
File source = new File("C:\\Users\\xfy\\desktop\\工作文档\\2817\\test_1111.mp4");  
File target = new File("C:\\Users\\xfy\\desktop\\工作文档\\2817\\test_1111.avi");// 转MP4  
System.out.println(source.length());  
  
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("avi");// 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();  
}

如果还是不懂可以去我的博客看下 http://blog.csdn.net/xiaopy_0508/article/details/54962386