ffmpeg windows和linux下转换格式

我不是女神ヾ 2022-05-08 11:22 224阅读 0赞

import java.io.BufferedReader;
    import java.io.IOException;
    import java.io.InputStream;
    import java.io.InputStreamReader;
    import java.util.ArrayList;
    import java.util.Date;
    import java.util.List;
    
    public class ConvertVideo {
    
    	// ffmpeg能解析的格式：（asx，asf，mpg，wmv，3gp，mp4，mov，avi，flv等）
    	
    	/**
    	 * @param path 项目根目录 
    	 * @param name 需要转换的文件名
    	 * @return
    	 */
    	public static String processVedio(String path, String name) {
          
    		if (WcyUtil.isWindows()) {
    			System.out.println("windows操作系统");
    			path=processVediowindows(path, name);
    		} else {
    			System.out.println("linux操作系统");
    			path=processVediolinux(path, name);
    		}
    		return path;
    	}
    
    	// ffmpeg能解析的格式：（asx，asf，mpg，wmv，3gp，mp4，mov，avi，flv等）
    	public static String processVediowindows(String path, String name) {
    		List<String> command = new ArrayList<String>();
    
    		
    		command.add(path + "/ffmpeg/ffmpeg");
    
    		command.add("-i");
    		command.add(path + "/cache/" + name);// 待转换文件绝对路径
    		name = name.substring(0, name.lastIndexOf(".")) + ".mp4";
    		path = path + "/backup/" + name;
    		command.add(path);  // 待输出文件绝对路径
    		try {
    			Date date = new Date();
    			Process videoProcess = new ProcessBuilder(command).redirectErrorStream(true).start();
    			new PrintStream(videoProcess.getErrorStream()).start();
    			new PrintStream(videoProcess.getInputStream()).start();
    			videoProcess.waitFor();
    			Date date1 = new Date();
    			System.out.println("转换格式花费" + (date1.getTime() - date.getTime()) + "毫秒");
    		} catch (Exception e) {
    			System.out.println("转换文件格式失败");
    		} finally {
    			return path;
    		}
    	}
    
    	// ffmpeg能解析的格式：（asx，asf，mpg，wmv，3gp，mp4，mov，avi，flv等）
    	public static String processVediolinux(String path, String name) {
    		List<String> commend = new ArrayList<String>();
    		commend.add("ffmpeg");
    		commend.add("-i");
    		commend.add(path + "/cache/" + name);// 待转换文件绝对路径
            commend.add("-strict");
            commend.add("-2");
    		
    		name = name.substring(0, name.lastIndexOf(".")) + ".mp4";
    		path = path + "/backup/" + name;
    		commend.add(path); // 待输出文件绝对路径
    		StringBuffer test = new StringBuffer();
    		for (int i = 0; i < commend.size(); i++)
    			test.append(commend.get(i) + " ");
    		System.out.println(test);
    		try {
    			Runtime rt = Runtime.getRuntime();
    			Process proc = rt.exec(test.toString());
    			InputStream stderr = proc.getErrorStream();
    			InputStreamReader isr = new InputStreamReader(stderr);
    			BufferedReader br = new BufferedReader(isr);
    			String line = null;
    			while ((line = br.readLine()) != null)
    				;
    
    		} catch (IOException e) {
    			e.printStackTrace();
    		}
    		System.out.println("视频转换成功");
    		return path;
    	}
    }
    
    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();
    		}
    	}
    }