- 开源项目 JAVE (Java Audio Video Encoder)
- 引入依赖
<dependency>
<groupId>ws.schild</groupId>
<artifactId>jave-all-deps</artifactId>
<version>2.7.2</version>
</dependency>
- 编码测试
package test;
import java.io.File;
import ws.schild.jave.AudioAttributes;
import ws.schild.jave.AudioInfo;
import ws.schild.jave.Encoder;
import ws.schild.jave.EncodingAttributes;
import ws.schild.jave.MultimediaInfo;
import ws.schild.jave.MultimediaObject;
import ws.schild.jave.VideoAttributes;
import ws.schild.jave.VideoInfo;
import ws.schild.jave.VideoSize;
public class Test {
public static void main(String[] args) throws Exception {
File source = new File("d:/source.mp4");
File target = new File("d:/target.mp4");
System.out.println("源视频信息");
MultimediaObject object = new MultimediaObject(source);
MultimediaInfo info = object.getInfo();
System.out.println("格式format：" + info.getFormat());
System.out.println("时长duration：" + info.getDuration());
VideoInfo videoInfo = info.getVideo();
System.out.println("编码decoder：" + videoInfo.getDecoder());
System.out.println("码率bitRate：" + videoInfo.getBitRate());
System.out.println("帧率frameRate：" + videoInfo.getFrameRate());
VideoSize videoSize = videoInfo.getSize();
System.out.println("分辨率：" + videoSize.getWidth() + " x " + videoSize.getHeight());
AudioInfo audioInfo = info.getAudio();
System.out.println("编码decoder：" + audioInfo.getDecoder());
System.out.println("码率bitRate：" + audioInfo.getBitRate());
System.out.println("声道channels：" + audioInfo.getChannels());
System.out.println("采样率samplingRate：" + audioInfo.getSamplingRate());
// 视频属性
VideoAttributes video = new VideoAttributes();
video.setCodec("libx264");
video.setBitRate(256000); // 码率：256kbps
video.setFrameRate(25); // 帧率：25fps
int width = 640; // 固定宽度
int height = width * videoSize.getHeight() / videoSize.getWidth();
height = height%2==0 ? height : height+1; // 视频宽高必须是偶数
video.setSize(new VideoSize(width, height));
// 音频属性
AudioAttributes audio = new AudioAttributes();
audio.setCodec("aac");
audio.setBitRate(64000); // 码率：64kbps
audio.setSamplingRate(24000); // 采样率：24kHz
// 转码属性
EncodingAttributes attributes = new EncodingAttributes();
attributes.setVideoAttributes(video);
attributes.setAudioAttributes(audio);
attributes.setFormat("mp4");
Encoder encoder = new Encoder();
encoder.encode(object, target, attributes);
System.out.println("转码完成：新分辨率：" + width + " x " + height);
}
}
- 测试结果
源视频信息
格式format：mov
时长duration：268280
编码decoder：h264 (Main) (avc1 / 0x31637661)
码率bitRate：500000
帧率frameRate：25.0
分辨率：768 x 432
编码decoder：aac (LC) (mp4a / 0x6134706D)
码率bitRate：96000
声道channels：2
采样率samplingRate：44100
转码完成：新分辨率：640 x 360
