How to split a video file into multiple video files in Java

Question

I started learning about java coding and I want to split the video file, so here I obtained the code from youtube. The code split the file into parts of required mb I did some modification wanting it to split the file into required number of parts. This original code splits the file into 16 mb here :

if(e==1024*1024*16) // split the file to 16 mb for each part
        {
            e =0L;
            fout.close();
            doPart();
        }

so if I put want the value in kb eg. 300kb for each part, the program just does not split the file for me.

    package fsplit;

    import java.io.File;
    import java.io.RandomAccessFile;

    public class SplitVid {
    public static void main(String args[])
    {
        try {
            new SplitVid();

        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    } // end main
    File f=new File("thisfile.mp4");
    long fsize = f.length()/1024; // file size in bytes
    long parts = 9; // Divide the file into how many parts?
    long fsizeOfEachinkB = fsize/parts;
    int readInt;
    RandomAccessFile fin, fout;
    byte b[] = new byte[2048];
    long e = 0L;
    int j = 1;
    public SplitVid() throws Exception
    {
        fin=new RandomAccessFile(f, "r");
        doPart();

    }

    public void doPart() throws Exception
    {
        fout = new RandomAccessFile(f.getPath() + "Part"+j++, "rw");

        while((readInt = fin.read(b))!= -1)
        {
            fout.write(b, 0, readInt);
            e+= readInt;


            **if(e==1024*fsizeOfEachinkB)//divide each file into fsize/parts per file**
            {
                e =0L;
                fout.close();
                doPart();
            }
        }
        System.out.println("The size of this file is " + f.length()/1024 + " kb");
        System.out.println("The file is divided into " + parts + " parts");
        System.out.println("Each part has " + fsizeOfEachinkB + " kb");
        fout.close();
        fin.close();
        f.delete(); // deletes the original file after the split is done

    }


} //end class

Now if I increase 'parts' until fsizeOfEachinkB is less than 1 mb, then the program just does not split the files at all. Anyone please help me looking into this ?

Answer 1

Split the File Despicable Me 2 - Trailer (HD) - YouTube.mp4 into twenty equal parts

Note: Paste the file Despicable Me 2 - Trailer (HD) - YouTube.mp4 under Documents folder.

Example of split video file into multiple video files using java.

Code:

package com.uk.mysqlmaven.jsf.test;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
/**
 * 
 * @author uday.p
 *
 */
public class SplitVideoFile {
    public static void main(String[] args) {
        try {
            File file = new File("C:/Documents/Despicable Me 2 - Trailer (HD) - YouTube.mp4");//File read from Source folder to Split.
            if (file.exists()) {

            String videoFileName = file.getName().substring(0, file.getName().lastIndexOf(".")); // Name of the videoFile without extension
            File splitFile = new File("C:/Documents/Videos_Split/"+ videoFileName);//Destination folder to save.
            if (!splitFile.exists()) {
                splitFile.mkdirs();
                System.out.println("Directory Created -> "+ splitFile.getAbsolutePath());
            }

            int i = 01;// Files count starts from 1
            InputStream inputStream = new FileInputStream(file);
            String videoFile = splitFile.getAbsolutePath() +"/"+ String.format("%02d", i) +"_"+ file.getName();// Location to save the files which are Split from the original file.
            OutputStream outputStream = new FileOutputStream(videoFile);
            System.out.println("File Created Location: "+ videoFile);
            int totalPartsToSplit = 20;// Total files to split.
            int splitSize = inputStream.available() / totalPartsToSplit;
            int streamSize = 0;
            int read = 0;
            while ((read = inputStream.read()) != -1) {

                if (splitSize == streamSize) {
                    if (i != totalPartsToSplit) {
                        i++;
                        String fileCount = String.format("%02d", i); // output will be 1 is 01, 2 is 02
                        videoFile = splitFile.getAbsolutePath() +"/"+ fileCount +"_"+ file.getName();
                        outputStream = new FileOutputStream(videoFile);
                        System.out.println("File Created Location: "+ videoFile);
                        streamSize = 0;
                    }
                }
                outputStream.write(read);
                streamSize++;
            }

            inputStream.close();
            outputStream.close();
            System.out.println("Total files Split ->"+ totalPartsToSplit);
        } else {
            System.err.println(file.getAbsolutePath() +" File Not Found.");
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}
}

Console Output:

File Created Location: C:\Documents\Videos_Split\Despicable Me 2 - Trailer (HD) - YouTube/01_Despicable Me 2 - Trailer (HD) - YouTube.mp4
File Created Location: C:\Documents\Videos_Split\Despicable Me 2 - Trailer (HD) - YouTube/02_Despicable Me 2 - Trailer (HD) - YouTube.mp4
File Created Location: C:\Documents\Videos_Split\Despicable Me 2 - Trailer (HD) - YouTube/03_Despicable Me 2 - Trailer (HD) - YouTube.mp4
File Created Location: C:\Documents\Videos_Split\Despicable Me 2 - Trailer (HD) - YouTube/04_Despicable Me 2 - Trailer (HD) - YouTube.mp4
File Created Location: C:\Documents\Videos_Split\Despicable Me 2 - Trailer (HD) - YouTube/05_Despicable Me 2 - Trailer (HD) - YouTube.mp4
File Created Location: C:\Documents\Videos_Split\Despicable Me 2 - Trailer (HD) - YouTube/06_Despicable Me 2 - Trailer (HD) - YouTube.mp4
File Created Location: C:\Documents\Videos_Split\Despicable Me 2 - Trailer (HD) - YouTube/07_Despicable Me 2 - Trailer (HD) - YouTube.mp4
File Created Location: C:\Documents\Videos_Split\Despicable Me 2 - Trailer (HD) - YouTube/08_Despicable Me 2 - Trailer (HD) - YouTube.mp4
File Created Location: C:\Documents\Videos_Split\Despicable Me 2 - Trailer (HD) - YouTube/09_Despicable Me 2 - Trailer (HD) - YouTube.mp4
File Created Location: C:\Documents\Videos_Split\Despicable Me 2 - Trailer (HD) - YouTube/10_Despicable Me 2 - Trailer (HD) - YouTube.mp4
File Created Location: C:\Documents\Videos_Split\Despicable Me 2 - Trailer (HD) - YouTube/11_Despicable Me 2 - Trailer (HD) - YouTube.mp4
File Created Location: C:\Documents\Videos_Split\Despicable Me 2 - Trailer (HD) - YouTube/12_Despicable Me 2 - Trailer (HD) - YouTube.mp4
File Created Location: C:\Documents\Videos_Split\Despicable Me 2 - Trailer (HD) - YouTube/13_Despicable Me 2 - Trailer (HD) - YouTube.mp4
File Created Location: C:\Documents\Videos_Split\Despicable Me 2 - Trailer (HD) - YouTube/14_Despicable Me 2 - Trailer (HD) - YouTube.mp4
File Created Location: C:\Documents\Videos_Split\Despicable Me 2 - Trailer (HD) - YouTube/15_Despicable Me 2 - Trailer (HD) - YouTube.mp4
File Created Location: C:\Documents\Videos_Split\Despicable Me 2 - Trailer (HD) - YouTube/16_Despicable Me 2 - Trailer (HD) - YouTube.mp4
File Created Location: C:\Documents\Videos_Split\Despicable Me 2 - Trailer (HD) - YouTube/17_Despicable Me 2 - Trailer (HD) - YouTube.mp4
File Created Location: C:\Documents\Videos_Split\Despicable Me 2 - Trailer (HD) - YouTube/18_Despicable Me 2 - Trailer (HD) - YouTube.mp4
File Created Location: C:\Documents\Videos_Split\Despicable Me 2 - Trailer (HD) - YouTube/19_Despicable Me 2 - Trailer (HD) - YouTube.mp4
File Created Location: C:\Documents\Videos_Split\Despicable Me 2 - Trailer (HD) - YouTube/20_Despicable Me 2 - Trailer (HD) - YouTube.mp4
Total files Split ->20

Screenshot of Saved video files in Windows 8:

Below is the code for Join all video files as a single video file after split the video into multiple video files.

Note: Required jar file commons-io-2.2.jar

Code:

package com.uk.mysqlmaven.jsf.test;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Arrays;
/**
 * 
 * @author uday.p
 *
 */
public class JoinVideoFile {
    public static void main(String[] args) {
        try {
            File splitFiles = new File("C:/Documents/Videos_Split/Despicable Me 2 - Trailer (HD) - YouTube/");// get all files which are to be join
            if (splitFiles.exists()) {
                File[] files = splitFiles.getAbsoluteFile().listFiles();
                if (files.length != 0) {
                    System.out.println("Total files to be join: "+ files.length);

                String joinFileName = Arrays.asList(files).get(0).getName();
                System.out.println("Join file created with name -> "+ joinFileName);

                String fileName = joinFileName.substring(0, joinFileName.lastIndexOf("."));// video fileName without extension
                File fileJoinPath = new File("C:/Documents/Videos_Join/"+ fileName);// merge video files saved in this location

                if (!fileJoinPath.exists()) {
                    fileJoinPath.mkdirs();
                    System.out.println("Created Directory -> "+ fileJoinPath.getAbsolutePath());
                }

                OutputStream outputStream = new FileOutputStream(fileJoinPath.getAbsolutePath() +"/"+ joinFileName);

                for (File file : files) {
                    System.out.println("Reading the file -> "+ file.getName());
                    InputStream inputStream = new FileInputStream(file);

                    int readByte = 0;
                    while((readByte = inputStream.read()) != -1) {
                        outputStream.write(readByte);
                    }
                    inputStream.close();
                }

                System.out.println("Join file saved at -> "+ fileJoinPath.getAbsolutePath() +"/"+ joinFileName);
                outputStream.close();
            } else {
                System.err.println("No Files exist in path -> "+ splitFiles.getAbsolutePath());
            }
        } else {
            System.err.println("This path doesn't exist -> "+ splitFiles.getAbsolutePath());
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}
}

Console output:

Total files to be join: 20
Join file created with name -> 01_Despicable Me 2 - Trailer (HD) - YouTube.mp4
Reading the file -> 01_Despicable Me 2 - Trailer (HD) - YouTube.mp4
Reading the file -> 02_Despicable Me 2 - Trailer (HD) - YouTube.mp4
Reading the file -> 03_Despicable Me 2 - Trailer (HD) - YouTube.mp4
Reading the file -> 04_Despicable Me 2 - Trailer (HD) - YouTube.mp4
Reading the file -> 05_Despicable Me 2 - Trailer (HD) - YouTube.mp4
Reading the file -> 06_Despicable Me 2 - Trailer (HD) - YouTube.mp4
Reading the file -> 07_Despicable Me 2 - Trailer (HD) - YouTube.mp4
Reading the file -> 08_Despicable Me 2 - Trailer (HD) - YouTube.mp4
Reading the file -> 09_Despicable Me 2 - Trailer (HD) - YouTube.mp4
Reading the file -> 10_Despicable Me 2 - Trailer (HD) - YouTube.mp4
Reading the file -> 11_Despicable Me 2 - Trailer (HD) - YouTube.mp4
Reading the file -> 12_Despicable Me 2 - Trailer (HD) - YouTube.mp4
Reading the file -> 13_Despicable Me 2 - Trailer (HD) - YouTube.mp4
Reading the file -> 14_Despicable Me 2 - Trailer (HD) - YouTube.mp4
Reading the file -> 15_Despicable Me 2 - Trailer (HD) - YouTube.mp4
Reading the file -> 16_Despicable Me 2 - Trailer (HD) - YouTube.mp4
Reading the file -> 17_Despicable Me 2 - Trailer (HD) - YouTube.mp4
Reading the file -> 18_Despicable Me 2 - Trailer (HD) - YouTube.mp4
Reading the file -> 19_Despicable Me 2 - Trailer (HD) - YouTube.mp4
Reading the file -> 20_Despicable Me 2 - Trailer (HD) - YouTube.mp4
Join file saved at -> C:\Documents\Videos_Join\01_Despicable Me 2 - Trailer (HD) - YouTube/01_Despicable Me 2 - Trailer (HD) - YouTube.mp4

Screenshot of Join Video file saved in Windows 8: