Java视频压缩

Java中可以通过使用Xuggler库实现视频压缩。

一、获取Xuggler库

首先需要获取Xuggler的库。

// Maven项目添加依赖
<dependency>
  <groupId>com.xuggle</groupId>
  <artifactId>xuggle-xuggler</artifactId>
  <version>5.4</version>
</dependency>

二、创建媒体读取器和媒体编写器

然后创建一个媒体读取器用于读取原始的视频文件,并创建一个媒体编写器用于写入压缩后的视频文件。

import com.xuggle.mediatool.IMediaReader;
import com.xuggle.mediatool.IMediaWriter;
import com.xuggle.mediatool.ToolFactory;
import com.xuggle.mediatool.event.IAddStreamEvent;
import com.xuggle.mediatool.event.IWritePacketEvent;
import com.xuggle.mediatool.event.IWriteHeaderEvent;
import com.xuggle.mediatool.event.IWriteTrailerEvent;
import com.xuggle.xuggler.ic;
import com.xuggle.mediatool.IMediaTool;

public class VideoCompressor {
  public static void main(String[] args) {
    String inputFilename = "input.mp4";
    String outputFilename = "output.flv";
    
    // create a media reader
    IMediaReader mediaReader = ToolFactory.makeReader(inputFilename);
    
    // create a media writer
    IMediaWriter mediaWriter = ToolFactory.makeWriter(outputFilename, mediaReader);
    
    // add a writer to the reader, to create the output file
    mediaReader.addListener(mediaWriter);

    // create a tool to add a media listener
    IMediaTool imageMediaTool = new StaticImageMediaTool();
    mediaWriter.addListener(imageMediaTool);
  
    // read and decode packets from the source file and
    // and dispatch decoded audio and video to the writer
    while (mediaReader.readPacket() == null) ;
}
}

三、设置视频压缩比例

最后需要设置视频压缩的比例。在这个过程中,可以通过IStreamCoder设置编码器参数,如比特率、帧率和分辨率等等。

import com.xuggle.xuggler.IStreamCoder;
import com.xuggle.xuggler.IStream;
import com.xuggle.xuggler.IRational;
import com.xuggle.xuggler.ICodec;

public class VideoCompressor {

    public void compressVideo(String inputFilename, String outputFilename, int audioBitrate, int videoBitrate) {
    // create a media reader
    IMediaReader mediaReader = ToolFactory.makeReader(inputFilename);

    // create a media writer
    IMediaWriter mediaWriter = ToolFactory.makeWriter(outputFilename, mediaReader);

    // manually configure the video stream
    IStreamCoder coder = IStream.make(null, 0, ICodec.ID.CODEC_ID_FLV1, ICodec.Type.CODEC_TYPE_VIDEO, videoBitrate).getStreamCoder();
    coder.setWidth(320);
    coder.setHeight(240);
    coder.setFrameRate(IRational.make(15, 1));
    coder.setGlobalQuality(0);

    // manually configure the audio stream
    coder = IStream.make(null, 1, ICodec.ID.CODEC_ID_MP3, ICodec.Type.CODEC_TYPE_AUDIO, audioBitrate).getStreamCoder();
    coder.setChannels(2);
    coder.setSampleRate(44100);

    // add a writer to the reader
    mediaReader.addListener(mediaWriter);

    // read and decode packets, will be dispatched to writer
    while (mediaReader.readPacket() == null) ;
} 
}


本文链接:https://my.lmcjl.com/post/15129.html

展开阅读全文

4 评论

留下您的评论.