ffmepg入门学习七 ffmepg把多个视频合成一个视频

1.准备

  

ffmpeg

链接：https://pan.baidu.com/s/1oh_36qFxnLW5Kmdf8F5eTQ 
提取码：rsdn 
复制这段内容后打开百度网盘手机App，操作更方便哦

准备3个视频

test.txt

  
  
file '20190516150254.mp4'
file '20190516151754.mp4'
file '20190516153254.mp4'
  
  

2.代码 

  
  
package com.qihui.qxj.services.system;

import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

import org.junit.Test;

public class Test1 {

/**
* 把多个视频合成一个视频
*/
@ Test
public void test4( ){
try {
List commend = new ArrayList();
commend. add( "c:/bin/ffmpeg.exe");
commend. add( "-loglevel");
commend. add( "8");
commend. add( "-y");
commend. add( "-f");
commend. add( "concat");
commend. add( "-safe");
commend. add( "0");
commend. add( "-i");
commend. add( "D:/project/direct/40/test.txt");
commend. add( "-c");
commend. add( "copy");
commend. add( "-y");
commend. add( "d:/out.mp4");
start(commend);
} catch (Exception e) {
e.printStackTrace();
}
}

private void start(List commend) {
Process p = null;
try {
ProcessBuilder builder = new ProcessBuilder(commend);
builder.command(commend);
p = builder.start();
p.getOutputStream().close();
doWaitFor(p);
p.destroy();
} catch (Exception e) {
PrintCatchErrorMsg.Print(e, "Part", "getRSTPPicture.catch", "Exception");
p.destroy();
}
}


public static int doWaitFor(Process p) {
InputStream in = null;
InputStream err = null;
int exitValue = -1;

try {
in = p.getInputStream();
err = p.getErrorStream();
boolean finished = false;

while(!finished) {
try {
Character c;
while( in.available() > 0) {
c = new Character(( char) in.read());
System. out.print(c);
}

while(err.available() > 0) {
c = new Character(( char)err.read());
System. out.print(c);
}

exitValue = p.exitValue();
finished = true;
} catch (IllegalThreadStateException var19) {
Thread.currentThread();
Thread.sleep( 500L);
}
}
} catch (Exception var20) {
} finally {
try {
if ( in != null) {
in.close();
}
} catch (IOException var18) {
}

if (err != null) {
try {
err.close();
} catch (IOException var17) {
}
}

}

return exitValue;
}
}
  
  

c:/bin/ffmpeg.exe 是ffmepg的安装地址

3、注意事项

输入文件必须是有序的，写入文件text.txt中
输入文件格式最好相同，分辨率大小最好相同

转载自：https://blog.csdn.net/qq_16855077/article/details/90265073

1.准备