ffmpeg获取视频时长等相关信息

找的资料，整理了一下

ffmpeg下载地址：http://ffmpeg.org/

依赖包：jakarta-oro.jar，提供一个下载链接http://download.csdn.net/detail/q370797240/8420579

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.PatternCompiler;
import org.apache.oro.text.regex.PatternMatcher;
import org.apache.oro.text.regex.Perl5Compiler;
import org.apache.oro.text.regex.Perl5Matcher;

12 
public class Test {

    public static void main(String[] args) {
        String result = processFLV("F:\\test\\tc111418.mov");
        PatternCompiler compiler = new Perl5Compiler();
        try {
            String regexDuration = "Duration: (.*?), start: (.*?), bitrate: (\\d*) kb\\/s";
            String regexVideo = "Video: (.*?), (.*?), (.*?)[,\\s]";
            String regexAudio = "Audio: (\\w*), (\\d*) Hz";

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

                System.out.println("提取出播放时间  ===" + re.group(1));
                System.out.println("开始时间        =====" + re.group(2));
                System.out.println("bitrate 码率 单位 kb==" + re.group(3));
            }

            org.apache.oro.text.regex.Pattern patternVideo =
             compiler.compile(regexVideo,Perl5Compiler.CASE_INSENSITIVE_MASK);
             PatternMatcher matcherVideo = new Perl5Matcher();
            
             if(matcherVideo.contains(result, patternVideo)){
                 org.apache.oro.text.regex.MatchResult re = matcherVideo.getMatch();
             System.out.println("编码格式  ===" +re.group(1));
             System.out.println("视频格式 ===" +re.group(2));
             System.out.println(" 分辨率  == =" +re.group(3));
             }
            
             org.apache.oro.text.regex.Pattern patternAudio =
             compiler.compile(regexAudio,Perl5Compiler.CASE_INSENSITIVE_MASK);
             PatternMatcher matcherAudio = new Perl5Matcher();
            
             if(matcherAudio.contains(result, patternAudio)){
                 org.apache.oro.text.regex.MatchResult re = matcherAudio.getMatch();
             System.out.println("音频编码             ===" +re.group(1));
             System.out.println("音频采样频率  ===" +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) {
        List<String> commend = new java.util.ArrayList<String>();
        commend.add("F:/ffmpeg/bin/ffmpeg.exe");
        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;
            }
            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;
        }
    }

}

另外ffmpeg也可以用来截图，截图方法如下：

    /**
     * 给指定的视频文件截图，图片大小为256*144
     * @param fullPath
     * @param fileName
     * @throws IOException
     */
    public static void createImg(String fullPath, String fileName)throws IOException {
        if(fullPath==null||fileName==null){
            return;
        }
        StringBuilder cmdBuilder = new StringBuilder();
        cmdBuilder.append("F:/ffmpeg/bin/ffmpeg.exe -i");
        // cmdBuilder.append("/usr/local/bin/ffmpeg -i");
        cmdBuilder.append(" ");
        cmdBuilder.append("-i");
        cmdBuilder.append(" ");
        cmdBuilder.append(fullPath);
        cmdBuilder.append(" ");
        cmdBuilder.append("-y -f image2 -ss 8 -t 0.001 -s 256*144");
        cmdBuilder.append(" ");
        cmdBuilder.append("F:/image/");
        cmdBuilder.append(fileName);

        String cmdStr = cmdBuilder.toString();
        cmdStr = cmdStr.replace(".mov|.mp4", ".jpg");
        Process process = Runtime.getRuntime().exec(cmdStr);
        try {
            process.waitFor();
        } catch (InterruptedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

fullPath为所要截图的视频，

fileName为截图文件的名称，这里截图的地址存放在F:/image/文件，偷懒没有把它写入传入参数中~ ~。