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 專案根目錄 
	 * @param name 需要轉換的檔名
	 * @return
	 */
	public static String processVedio(String path, String name) {
      
		if (WcyUtil.isWindows()) {
			System.out.println("windows作業系統");
			path=processVediowindows(path, name);
		} else {
			System.out.println("linux作業系統");
			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);// 待轉換檔案絕對路徑
		name = name.substring(0, name.lastIndexOf(".")) + ".mp4";
		path = path + "/backup/" + name;
		command.add(path);  // 待輸出檔案絕對路徑
		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("轉換格式花費" + (date1.getTime() - date.getTime()) + "毫秒");
		} catch (Exception e) {
			System.out.println("轉換檔案格式失敗");
		} 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);// 待轉換檔案絕對路徑
        commend.add("-strict");
        commend.add("-2");
		
		name = name.substring(0, name.lastIndexOf(".")) + ".mp4";
		path = path + "/backup/" + name;
		commend.add(path); // 待輸出檔案絕對路徑
		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("視訊轉換成功");
		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();
		}
	}
}