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ffmepg入门学习七 ffmepg把多个视频合成一个视频

作者：互联网

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

  1. file '20190516150254.mp4'
  2. file '20190516151754.mp4'
  3. file '20190516153254.mp4'

2.代码 

  1. package com.qihui.qxj.services.system;
  2.  
  3. import java.io.IOException;
  4. import java.io.InputStream;
  5. import java.util.ArrayList;
  6. import java.util.List;
  7.  
  8. import org.junit.Test;
  9.  
  10. public class Test1 {
  11. 	
  12. 	/**
  13. 	 * 把多个视频合成一个视频
  14. 	 */
  15. 	@Test
  16. 	public void test4(){
  17. 		try {
  18. 			List commend = new ArrayList();
  19. 			commend.add("c:/bin/ffmpeg.exe");
  20. 			commend.add("-loglevel");
  21. 			commend.add("8");
  22. 			commend.add("-y");
  23. 			commend.add("-f");
  24. 			commend.add("concat");
  25. 			commend.add("-safe");
  26. 			commend.add("0");
  27. 			commend.add("-i");
  28. 			commend.add("D:/project/direct/40/test.txt");
  29. 			commend.add("-c");
  30. 			commend.add("copy");
  31. 			commend.add("-y");
  32. 			commend.add("d:/out.mp4");
  33. 			start(commend);
  34. 		} catch (Exception e) {
  35. 			e.printStackTrace();
  36. 		}
  37. 	}
  38. 	
  39. 	private void start(List commend) {
  40. 		Process p = null;
  41. 		try {
  42. 			ProcessBuilder builder = new ProcessBuilder(commend);
  43. 			builder.command(commend);
  44. 			p = builder.start();
  45. 			p.getOutputStream().close();
  46. 			doWaitFor(p);
  47. 			p.destroy();
  48. 		} catch (Exception e) {
  49. 			PrintCatchErrorMsg.Print(e, "Part", "getRSTPPicture.catch", "Exception");
  50. 			p.destroy();
  51. 		}
  52. 	}
  53. 	
  54.    
  55.    public static int doWaitFor(Process p) {
  56. 	      InputStream in = null;
  57. 	      InputStream err = null;
  58. 	      int exitValue = -1;
  59.  
  60. 	      try {
  61. 	         in = p.getInputStream();
  62. 	         err = p.getErrorStream();
  63. 	         boolean finished = false;
  64.  
  65. 	         while(!finished) {
  66. 	            try {
  67. 	               Character c;
  68. 	               while(in.available() > 0) {
  69. 	                  c = new Character((char)in.read());
  70. 	                  System.out.print(c);
  71. 	               }
  72.  
  73. 	               while(err.available() > 0) {
  74. 	                  c = new Character((char)err.read());
  75. 	                  System.out.print(c);
  76. 	               }
  77.  
  78. 	               exitValue = p.exitValue();
  79. 	               finished = true;
  80. 	            } catch (IllegalThreadStateException var19) {
  81. 	               Thread.currentThread();
  82. 	               Thread.sleep(500L);
  83. 	            }
  84. 	         }
  85. 	      } catch (Exception var20) {
  86. 	      } finally {
  87. 	         try {
  88. 	            if (in != null) {
  89. 	               in.close();
  90. 	            }
  91. 	         } catch (IOException var18) {
  92. 	         }
  93.  
  94. 	         if (err != null) {
  95. 	            try {
  96. 	               err.close();
  97. 	            } catch (IOException var17) {
  98. 	            }
  99. 	         }
  100.  
  101. 	      }
  102.  
  103. 	      return exitValue;
  104. 	   }
  105. }

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

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标签：视频,入门,err,try,commend,add,ffmepg,catch,import
来源： https://blog.csdn.net/luoyong_blog/article/details/104497633