java 通过url地址 获取视频时长

`
创建普通的maven项目 准备打包为jar 调用

  <groupId>ws.schild</groupId>
<artifactId>jave</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>

<dependencies>
   <!-- jave核心包 -->
    <dependency>
        <groupId>ws.schild</groupId>
        <artifactId>jave-core</artifactId>
        <version>2.4.6</version>
    </dependency>
    <!-- window64位 ffmpeg -->
    <dependency>
        <groupId>ws.schild</groupId>
        <artifactId>jave-native-win64</artifactId>
        <version>2.4.6</version>
    </dependency>
    <!-- linux64位 ffmpeg -->
    <dependency>
        <groupId>ws.schild</groupId>
        <artifactId>jave-native-linux64</artifactId>
        <version>2.4.6</version>
    </dependency>

      </dependencies>

  </project>
  `
  `
  package ws.schild.jave;  //注意目录结构 一定要按照原有的结构 否则好多内部调用会调用不到

  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;

  import java.io.File;
  import java.io.IOException;
  import java.io.InputStreamReader;
  import java.util.StringTokenizer;
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;

  //这个方法只是copy的ffmpeg的源码，修改了部分参数，
  // 让能够直接读取url的时长，而不用把文件下载下来到本地再去判断多媒体音视频的时长
  public class FfmpegFileInfo {
private static final Log LOG = LogFactory.getLog(MultimediaObject.class);
private static final Pattern SIZE_PATTERN = Pattern.compile("(\d+)x(\d+)", 2);
private static final Pattern FRAME_RATE_PATTERN = Pattern.compile("([\d.]+)\s+(?:fps|tbr)", 2);
private static final Pattern BIT_RATE_PATTERN = Pattern.compile("(\d+)\s+kb/s", 2);
private static final Pattern SAMPLING_RATE_PATTERN = Pattern.compile("(\d+)\s+Hz", 2);
private static final Pattern CHANNELS_PATTERN = Pattern.compile("(mono|stereo|quad)", 2);
private final FFMPEGLocator locator;
private File inputFile;

public FfmpegFileInfo(File input) {
    this.locator = new DefaultFFMPEGLocator();
    this.inputFile = input;
}

public File getFile() {
    return this.inputFile;
}

public void setFile(File file) {
    this.inputFile = file;
}

public FfmpegFileInfo(File input, FFMPEGLocator locator) {
    this.locator = locator;
    this.inputFile = input;
}

public MultimediaInfo getInfo(String url) throws InputFormatException, EncoderException {
        FFMPEGExecutor ffmpeg = this.locator.createExecutor();
        ffmpeg.addArgument("-i");
        ffmpeg.addArgument(url);
        try {
            ffmpeg.execute();
        } catch (IOException var8) {
            throw new EncoderException(var8);
        }

        MultimediaInfo var3;
        try {
            RBufferedReader reader = new RBufferedReader(new InputStreamReader(ffmpeg.getErrorStream()));
            var3 = this.parseMultimediaInfo(this.inputFile, reader);
        } finally {
            ffmpeg.destroy();
        }
        return var3;

}

private MultimediaInfo parseMultimediaInfo(File source, RBufferedReader reader) throws InputFormatException, EncoderException {
    Pattern p1 = Pattern.compile("^\s*Input #0, (\w+).+$\s*", 2);
    Pattern p2 = Pattern.compile("^\s*Duration: (\d\d):(\d\d):(\d\d)\.(\d\d).*$", 2);
    Pattern p3 = Pattern.compile("^\s*Stream #\S+: ((?:Audio)|(?:Video)|(?:Data)): (.*)\s*$", 2);
    Pattern p4 = Pattern.compile("^\s*Metadata:", 2);
    MultimediaInfo info = null;

    try {
        int step = 0;

        while(true) {
            String line = reader.readLine();
            LOG.debug("Output line: " + line);
            if (line == null) {
                break;
            }

            //Matcher M2;
            String type;
            switch(step) {
                case 0:
                    String token = source.getAbsolutePath() + ": ";
                    if (line.startsWith(token)) {
                        String message = line.substring(token.length());
                        throw new InputFormatException(message);
                    }

                    Matcher m = p1.matcher(line);
                    if (m.matches()) {
                        type = m.group(1);
                        info = new MultimediaInfo();
                        info.setFormat(type);
                        ++step;
                    }
                    break;
                case 1:
                    m = p2.matcher(line);
                    if (m.matches()) {
                        long hours = (long)Integer.parseInt(m.group(1));
                        long minutes = (long)Integer.parseInt(m.group(2));
                        long seconds = (long)Integer.parseInt(m.group(3));
                        long dec = (long)Integer.parseInt(m.group(4));
                        long duration = dec * 10L + seconds * 1000L + minutes * 60L * 1000L + hours * 60L * 60L * 1000L;
                        info.setDuration(duration);
                        ++step;
                    }
                    break;
                case 2:
                    m = p3.matcher(line);
                    p4.matcher(line);
                    if (m.matches()) {
                        type = m.group(1);
                        String specs = m.group(2);
                        StringTokenizer st;
                        int i;
                      //  String token;
                        boolean parsed;
                        Matcher m2;
                        int bitRate;
                        if ("Video".equalsIgnoreCase(type)) {
                            VideoInfo video = new VideoInfo();
                            st = new StringTokenizer(specs, ",");

                            for(i = 0; st.hasMoreTokens(); ++i) {
                                token = st.nextToken().trim();
                                if (i == 0) {
                                    video.setDecoder(token);
                                } else {
                                    parsed = false;
                                    m2 = SIZE_PATTERN.matcher(token);
                                    if (!parsed && m2.find()) {
                                        bitRate = Integer.parseInt(m2.group(1));
                                        int height = Integer.parseInt(m2.group(2));
                                        video.setSize(new VideoSize(bitRate, height));
                                        parsed = true;
                                    }

                                    m2 = FRAME_RATE_PATTERN.matcher(token);
                                    if (!parsed && m2.find()) {
                                        try {
                                            float frameRate = Float.parseFloat(m2.group(1));
                                            video.setFrameRate(frameRate);
                                        } catch (NumberFormatException var22) {
                                            LOG.info("Invalid frame rate value: " + m2.group(1), var22);
                                        }

                                        parsed = true;
                                    }

                                    m2 = BIT_RATE_PATTERN.matcher(token);
                                    if (!parsed && m2.find()) {
                                        bitRate = Integer.parseInt(m2.group(1));
                                        video.setBitRate(bitRate * 1000);
                                        parsed = true;
                                    }
                                }
                            }

                            info.setVideo(video);
                        } else if ("Audio".equalsIgnoreCase(type)) {
                            AudioInfo audio = new AudioInfo();
                            st = new StringTokenizer(specs, ",");

                            for(i = 0; st.hasMoreTokens(); ++i) {
                                token = st.nextToken().trim();
                                if (i == 0) {
                                    audio.setDecoder(token);
                                } else {
                                    parsed = false;
                                    m2 = SAMPLING_RATE_PATTERN.matcher(token);
                                    if (!parsed && m2.find()) {
                                        bitRate = Integer.parseInt(m2.group(1));
                                        audio.setSamplingRate(bitRate);
                                        parsed = true;
                                    }

                                    m2 = CHANNELS_PATTERN.matcher(token);
                                    if (!parsed && m2.find()) {
                                        String ms = m2.group(1);
                                        if ("mono".equalsIgnoreCase(ms)) {
                                            audio.setChannels(1);
                                        } else if ("stereo".equalsIgnoreCase(ms)) {
                                            audio.setChannels(2);
                                        } else if ("quad".equalsIgnoreCase(ms)) {
                                            audio.setChannels(4);
                                        }

                                        parsed = true;
                                    }

                                    m2 = BIT_RATE_PATTERN.matcher(token);
                                    if (!parsed && m2.find()) {
                                        bitRate = Integer.parseInt(m2.group(1));
                                        audio.setBitRate(bitRate * 1000);
                                        parsed = true;
                                    }
                                }
                            }

                            info.setAudio(audio);
                        }
                    }
            }

            if (line.startsWith("frame=")) {
                reader.reinsertLine(line);
                break;
            }
        }
    } catch (IOException var23) {
        throw new EncoderException(var23);
    }

    if (info == null) {
        throw new InputFormatException();
    } else {
        return info;
    }
}

  }


  `


  项目调用 
  ` <!--封装jar包 根据url 解析视频时长-->
    <dependency>
        <groupId>ws.schild</groupId>
        <artifactId>jave</artifactId>
        <version>1.0-SNAPSHOT</version>
        <scope>system</scope>
        <systemPath>${basedir}/src/lib/jave-1.0-SNAPSHOT.jar</systemPath>
    </dependency>`



  加上这些代码就可以获取时长了
      /*
* 根据url地址获取视频时长
*/
private Long duration(String url)throws InputFormatException, EncoderException {
    File mediaFile = new File(url);
    log.info("视频url地址 ：{}", url);
    FfmpegFileInfo ffmpegFileInfo = new FfmpegFileInfo(mediaFile);
    ws.schild.jave.MultimediaInfo multimediaInfo = null;
    multimediaInfo = ffmpegFileInfo.getInfo(url);
    long playTime = multimediaInfo.getDuration();
    log.info("视频时长 ：{}",playTime);
    return playTime;

}

``

引入外部jar包

目录结构图：

参考文档 ：https://www.cnblogs.com/chenbinaiqiuyu/p/12736814.html