JAVA:通过FFMPEG获得视频的播放时间信息

FFMPEG.java

package net.binjoo.demo;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.List;

import org.apache.oro.text.regex.MalformedPatternException;
import org.apache.oro.text.regex.MatchResult;
import org.apache.oro.text.regex.Pattern;
import org.apache.oro.text.regex.PatternCompiler;
import org.apache.oro.text.regex.PatternMatcher;
import org.apache.oro.text.regex.Perl5Compiler;
import org.apache.oro.text.regex.Perl5Matcher;
/**
 * jakarta-oro-2.0.8 http://jakarta.apache.org/oro/
 **/
public class FFMPEG {

  public static void main(String[] args) {
		String result = processFLV("E:\\mmpp.MP4");
		
		PatternCompiler compiler = new Perl5Compiler();
		try {
			String regexDuration = "Duration: (.*?), start: (.*?), bitrate: (\\d*) kb\\/s";
			String regexVideo = "Video: (.*?), (.*?), (.*?)[,\\s]";
			String regexAudio = "Audio: (\\w*), (\\d*) Hz";

			Pattern patternDuration = compiler.compile(regexDuration, Perl5Compiler.CASE_INSENSITIVE_MASK);
			PatternMatcher matcherDuration = new Perl5Matcher();
			if (matcherDuration.contains(result, patternDuration)) {
				MatchResult re = matcherDuration.getMatch();

				System.out.println("视频时间\t===\t" + re.group(1));
				System.out.println("开始时间\t===\t" + re.group(2));
				System.out.println("bitrate 码率 单位 kb\t===\t" + re.group(3));
			}

			Pattern patternVideo = compiler.compile(regexVideo, Perl5Compiler.CASE_INSENSITIVE_MASK);
			PatternMatcher matcherVideo = new Perl5Matcher();

			if (matcherVideo.contains(result, patternVideo)) {
				MatchResult re = matcherVideo.getMatch();
				System.out.println("编码格式\t===\t" + re.group(1));
				System.out.println("视频格式\t===\t" + re.group(2));
				System.out.println("分辨率\t===\t" + re.group(3));
			}

			Pattern patternAudio = compiler.compile(regexAudio, Perl5Compiler.CASE_INSENSITIVE_MASK);
			PatternMatcher matcherAudio = new Perl5Matcher();

			if (matcherAudio.contains(result, patternAudio)) {
				MatchResult re = matcherAudio.getMatch();
				System.out.println("音频编码\t===\t" + re.group(1));
				System.out.println("音频采样频率\t===\t" + re.group(2));
			}
		} catch (MalformedPatternException e) {
			e.printStackTrace();
		}
	}

	// ffmpeg能解析的格式：（asx，asf，mpg，wmv，3gp，mp4，mov，avi，flv等）
	private static String processFLV(String inputPath) {
		/*
		 * if (!checkfile(inputPath)){ _log.warn(inputPath+" is not file");
		 * return false; }
		 */
		List<String> commend = new java.util.ArrayList<String>();

		commend.add("e:\\ffmpeg ");// 可以设置环境变量从而省去这行
		commend.add("ffmpeg");
		commend.add("-i");
		commend.add(inputPath);

		try {

			ProcessBuilder builder = new ProcessBuilder();
			builder.command(commend);
			builder.redirectErrorStream(true);
			Process p = builder.start();

			// 1. start
			BufferedReader buf = null; // 保存ffmpeg的输出结果流
			String line = null;
			// read the standard output

			buf = new BufferedReader(new InputStreamReader(p.getInputStream()));

			StringBuffer sb = new StringBuffer();
			while ((line = buf.readLine()) != null) {
				System.out.println(line);
				sb.append(line);
				continue;
			}
			int ret = p.waitFor();// 这里线程阻塞，将等待外部转换进程运行成功运行结束后，才往下执行
			// 1. end
			return sb.toString();
		} catch (Exception e) {
			// System.out.println(e);
			return null;
		}
	}
}