ffmepg started to learn java to six multiple pictures composite video and add an image watermark

1. Prepare

        Use ffmepg tool here will not elaborate too much, you can view details of my previous blog.

  20 pictures ready, I'm here twenty pictures were added time watermark pictures (you can not find the same picture, you can see the effect of switching on the line).

Features: 20 pictures need to composite video

Ideas: First, we kept in the local picture, usually stored by date, for example 20190515165200.jpg, if we want to use ffmepg, composite video, you need to create a new temp folder, and copy the previous picture to temp file next, attention must be satisfied to be regular, otherwise, ffmepeg is unrecognized

 

Note the following picture name format: all meet regular expression% 2d, because composite video, and will be sorted according to the index all the way to the end, if the middle is interrupted, the video will terminate synthesis.

How to understand this sentence?

We have found the following picture in front of the name is the name of +1 has been, if we put 05 into 22, explanatory video to stop Picture 04 Le synthesized video command contains 0-4 pictures.

2. Multiple Pictures composite video codes

  
  
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 {

/**
* Spliced ​​into the video image, here taken 20 pictures, video generated 10 seconds
*/
@ Test
public void test3 ( ) {
long startTime =System.currentTimeMillis();
List commend = new ArrayList();
commend. add( "c:/bin/ffmpeg.exe");
// to read 1fps
commend. add( "-r");
commend. add( "4");
// - threads 2 were run in two threads to speed up the processing speed.
commend. add( "-threads");
commend. add( "2");
commend. add( "-f");
commend. add( "image2");
commend. add( "-i");
commend. add( "d:/project/destimg/40/test/%2d.jpg");
commend. add( "-vcodec");
commend. add( "libx264");
// - y overwrite the output file
commend. add( "-y");
// - r 5 fps to 5 frames / sec (have different meanings in different positions)% 2d identifies the image file being
commend. add( "-r");
commend. add( "10");
commend. add( "d:/out.mp4");
start(commend);
long endTime =System.currentTimeMillis();
System. out.println((endTime-startTime));
}


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;
}
}
  
  

-r at different locations, resulting meaning is not the same, on the front -r -i, indicates the input, here I set 4, represents one second 4, 20 pictures, which is 5 seconds.

3. Multiple Pictures marked with composite video and picture watermark

  
  
/**
* Spliced ​​into the video image, here taken 20 pictures, video generated 10 seconds
*/
@ Test
public void test3 ( ) {
long startTime =System.currentTimeMillis();
List commend = new ArrayList();
commend. add( "c:/bin/ffmpeg.exe");
// to read 1fps
commend. add( "-r");
commend. add( "4");
// - threads 2 were run in two threads to speed up the processing speed.
commend. add( "-threads");
commend. add( "2");
commend. add( "-f");
commend. add( "image2");
commend. add( "-i");
commend. add( "d:/project/destimg/40/test1/%2d.jpg");
commend. add( "-i");
commend. add( "d:/1557906953.jpg");
commend. add( "-filter_complex");
commend. add(( new StringBuilder( "[1:v]scale=150:150[s];[0:v][s]overlay=")).append( 1800).append( ":").append( 900)
.toString());

commend. add( "-vcodec");
commend. add( "libx264");
// - y overwrite the output file
commend. add( "-y");
// - r 5 fps to 5 frames / sec (have different meanings in different positions)% 2d identifies the image file being
commend. add( "-r");
commend. add( "10");
commend. add( "d:/out.mp4");
start(commend);
long endTime =System.currentTimeMillis();
System. out.println((endTime-startTime));
}
  
  

 

     Compare the code above, a plurality of composite video images, plus video picture watermark, more following code:

        commend.add("-i");
        commend.add("d:/1557906953.jpg");     //这是图片水印，也就是上图的那个正方形

       commend.add("-filter_complex");    //设置滤镜
       commend.add((new StringBuilder("[1:v]scale=150:150[s];[0:v][s]overlay=")).append(1800).append(":").append(900)
                .toString());

       其他的代码，一目了然，很容易懂，可能添加滤镜这段代码很难懂，下面我们把它拆分一下

    [1:v]这个里头两个参数，1表示的是操作对象的编号。在本例中0就是图片需要合成视频的有序目录地址，1就是1557906953.png，3就是output.mp4。而另一个参数v表示操作对象里的视频信息。

      [1:v]scale=150:150[s];[0:v][s]overlay=1800:900

       所以这头一句[1:v]scale=150:150[s];的意思就是对图片1557906953.png进行调节尺寸的操作，并将这个操作的结果命名为s

      下一句[0:v][s]overlay=1800:900的意思就是对视频添加水印的的结果s添加水印,overlay就是水印的位置，在数学中，xy正数实在第一象限，而在这里，操作的实际上是第四象限，都为正数。

4.有意思例子

把上面的x坐标1800改为1800-t*30，我们可以看到图片跟着时间再向左运动。

转载自：https://blog.csdn.net/qq_16855077/article/details/90239644

1.准备