Ffmpeg to perform video calls flv file format conversion program with java

Illustrated by a small example java :( more intuitive directly compile and run)

I tested the environment in the windows platform. . .

It requires e: with / at ffmpeg.exe; mencoder.exe; drv43260.dll; pncrt.dll total of four files.

How to get these four documents refer to the article http://blog.sina.com.cn/u/4a424eca010005kb

Also in e: / input various decentralized available in the following video file of a file name; also e: / output; java program execution can be obtained after a file has been converted a.flv.

ffmpeg.exe can parse the format: (asx, asf, mpg, wmv, 3gp, mp4, mov, avi, flv , etc.)
to ffmpeg.exe unresolved file format (wmv9, rm, rmvb, etc.),

It can be converted using other tools (MEncoder) as avi (ffmpeg energy resolved) format;

mencoder.exe; drv43260.dll; pncrt.dll three files for the file format (wmv9, rm, rmvb, etc.)

Convert avi (FFmpeg energy resolved) prepared format; then the converted avi file ffmpeg.exe then converted into flv format video files. . .

package com.jh.test;

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

public class ConvertVideo {
private static String inputPath = "";

private static String outputPath = "";

private static String ffmpegPath = "";

public static void main(String args[]) throws IOException {

    getPath();

    if (!checkfile(inputPath)) {
        System.out.println(inputPath + " is not file");
        return;
    }
    if (process()) {
        System.out.println("ok");
    }
}

public static void getPath(){
     // 先获取当前项目路径，在获得源文件、目标文件、转换器的路径
    File diretory = new File("");
    try {
        String currPath = diretory.getAbsolutePath();
        //视频的地址
        inputPath = "C:\\平行四边形面积.flv";
        //视频转完格式存放地址
        outputPath = "E:\\mp4\\";
        //转换视频的插件位置
        ffmpegPath = "G:\\工具类\\ffmpeg-20171225-be2da4c-win64-static\\ffmpeg-20171225-be2da4c-win64-static\\bin\\";
        System.out.println(currPath);
    }
    catch (Exception e) {
        System.out.println("getPath出错");
    }
}

public static boolean process() {
    int type = checkContentType();
    boolean status = false;
        System.out.println("直接转成mp4格式");
        status = processMp4(inputPath);// 直接转成mp4格式
    return status;
}

private static int checkContentType() {
    String type = inputPath.substring(inputPath.lastIndexOf(".") + 1, inputPath.length())
            .toLowerCase();
    // ffmpeg能解析的格式：（asx，asf，mpg，wmv，3gp，mp4，mov，avi，flv等）
    if (type.equals("avi")) {
        return 0;
    } else if (type.equals("mpg")) {
        return 0;
    } else if (type.equals("wmv")) {
        return 0;
    } else if (type.equals("3gp")) {
        return 0;
    } else if (type.equals("mov")) {
        return 0;
    } else if (type.equals("mp4")) {
        return 0;
    } else if (type.equals("asf")) {
        return 0;
    } else if (type.equals("asx")) {
        return 0;
    } else if (type.equals("flv")) {
        return 0;
    }
    // 对ffmpeg无法解析的文件格式(wmv9，rm，rmvb等),
    // 可以先用别的工具（mencoder）转换为avi(ffmpeg能解析的)格式.
    else if (type.equals("wmv9")) {
        return 1;
    } else if (type.equals("rm")) {
        return 1;
    } else if (type.equals("rmvb")) {
        return 1;
    }
    return 9;
}

private static boolean checkfile(String path) {
    File file = new File(path);
    if (!file.isFile()) {
        return false;
    }
    return true;
}

// 对ffmpeg无法解析的文件格式(wmv9，rm，rmvb等), 可以先用别的工具（mencoder）转换为avi(ffmpeg能解析的)格式.
private static String processAVI(int type) {
    List<String> commend = new ArrayList<String>();
    commend.add(ffmpegPath + "mencoder");
    commend.add(inputPath);
    commend.add("-oac");
    commend.add("lavc");
    commend.add("-lavcopts");
    commend.add("acodec=mp3:abitrate=64");
    commend.add("-ovc");
    commend.add("xvid");
    commend.add("-xvidencopts");
    commend.add("bitrate=600");
    commend.add("-of");
    commend.add("mp4");
    commend.add("-o");
    commend.add(outputPath + "a.AVI");
    try {
        ProcessBuilder builder = new ProcessBuilder();
        Process process = builder.command(commend).redirectErrorStream(true).start();
        new PrintStream(process.getInputStream());
        new PrintStream(process.getErrorStream());
        process.waitFor();
        return outputPath + "a.AVI";
    } catch (Exception e) {
        e.printStackTrace();
        return null;
    }
}

// ffmpeg能解析的格式：（asx，asf，mpg，wmv，3gp，mp4，mov，avi，flv等）
private static boolean processFlv(String oldfilepath) {

    if (!checkfile(inputPath)) {
        System.out.println(oldfilepath + " is not file");
        return false;
    }
    List<String> command = new ArrayList<String>();
    command.add(ffmpegPath + "ffmpeg");
    command.add("-i");
    command.add(oldfilepath);
    command.add("-ab");
    command.add("56");
    command.add("-ar");
    command.add("22050");
    command.add("-qscale");
    command.add("8");
    command.add("-r");
    command.add("15");
    command.add("-s");
    command.add("600x500");
    command.add(outputPath + "a.flv");
    try {

        // 方案1

// Process videoProcess = Runtime.getRuntime().exec(ffmpegPath + "ffmpeg -i " + oldfilepath
// + " -ab 56 -ar 22050 -qscale 8 -r 15 -s 600x500 "
// + outputPath + "a.flv");

        // 方案2
        Process videoProcess = new ProcessBuilder(command).redirectErrorStream(true).start();

        new PrintStream(videoProcess.getErrorStream()).start();

        new PrintStream(videoProcess.getInputStream()).start();

        videoProcess.waitFor();

        return true;
    } catch (Exception e) {
        e.printStackTrace();
        return false;
    }
}

private static boolean processMp4(String oldfilepath) {

    if (!checkfile(inputPath)) {
        System.out.println(oldfilepath + " is not file");
        return false;
    }
    List<String> command = new ArrayList<String>();
    command.add(ffmpegPath + "ffmpeg");
    command.add("-i");
    command.add(oldfilepath);
    command.add("-c:v");
    command.add("libx264");
    command.add("-mbd");
    command.add("0");
    command.add("-c:a");
    command.add("aac");
    command.add("-strict");
    command.add("-2");
    command.add("-pix_fmt");
    command.add("yuv420p");
    command.add("-movflags");
    command.add("faststart");
    command.add(outputPath + "a.mp4");
    try {

        // 方案1
//        Process videoProcess = Runtime.getRuntime().exec(ffmpegPath + "ffmpeg -i " + oldfilepath 
//                + " -ab 56 -ar 22050 -qscale 8 -r 15 -s 600x500 "
//                + outputPath + "a.flv");

        // 方案2
        Process videoProcess = new ProcessBuilder(command).redirectErrorStream(true).start();

        new PrintStream(videoProcess.getErrorStream()).start();

        new PrintStream(videoProcess.getInputStream()).start();

        videoProcess.waitFor();

        return true;
    } catch (Exception e) {
        e.printStackTrace();
        return false;
    }
}

}
class PrintStream extends Thread
{
java.io.InputStream is = null;
public PrintStream(java.io.InputStream is)
{
is = is;
}

public void run() 
{
    try 
    {
        while(this != null) 
        {
            int _ch = __is.read();
            if(_ch != -1) 
                System.out.print((char)_ch); 
            else break;
        }
    } 
    catch (Exception e) 
    {
        e.printStackTrace();
    } 
}

}