Java获取视频的时长——日期时间处理

Problem：

如何通过Java获取视频的时长？

想通过Java来获取某文件夹（或多个文件夹）下的视频的总时长

经过查询资料，发现可以通过JAVE实现：The JAVE (Java Audio Video Encoder) library is Java wrapper on the ffmpeg project。
JAVE下载地址

Solution：

以单个目录下的视频为例，通过JAVE实现，并采用不同的日期时间处理方式转换为时-分-秒格式，顺便熟悉了一下Java 中的日期处理。

• Note：当然，需要导入下载的JAVE的jar文件。。

eg：

    import java.io.File;    import java.text.SimpleDateFormat;    import java.util.Calendar;    import java.util.Date;    import java.util.TimeZone;    import it.sauronsoftware.jave.Encoder;    import it.sauronsoftware.jave.EncoderException;    import it.sauronsoftware.jave.MultimediaInfo;    public class VideoDuration {        public void getVideoDuration(String path) {            // get all files in specified "path"            File[] files = new File(path).listFiles();            Encoder encoder = new Encoder();            MultimediaInfo multimediaInfo;            long totalTime = 0L;            long duration = 0L;            for (int i = 0; i < files.length; i++) {                // here, the format of video can be changed, JAVE upports dozens of formats                if (!files[i].isDirectory() && files[i].toString().endsWith(".avi")) {                    try {                        multimediaInfo = encoder.getInfo(files[i]);                        duration = multimediaInfo.getDuration();                        totalTime += duration;                    } catch (EncoderException e) {                        e.printStackTrace();                    }                }            }            // long --> hh:mm: calculate the time manually            System.out.print(totalTime/(3600*1000) + ":" + totalTime%(3600*1000)/(60*1000) + ":" + totalTime%(3600*1000)%(60*1000)/1000);            System.out.println("==>Manually");            // set a default TimeZone before using Date, Calendar and SimpleDateFormat              TimeZone.setDefault(TimeZone.getTimeZone("GMT+00:00")); // January 1, 1970, 00:00:00 GMT(can be found in Date.class)            // long --> hh:mm:ss by means of java.util.Date            Date date = new Date(totalTime);                    System.out.print(date.getHours() + ":" + date.getMinutes() + ":" + date.getSeconds());            System.out.println("==>By Date");            // long --> hh:mm:ss by means of java.util.Calendar, Date            Calendar calendar = Calendar.getInstance();            calendar.setTime(date);            System.out.print(calendar.get(Calendar.HOUR_OF_DAY) + ":" + calendar.get(Calendar.MINUTE) + ":" + calendar.get(Calendar.SECOND));            System.out.println("==>By Calendar");            // long --> hh:mm:ss by means of java.text.SimpleDateFormat, java.util.Date            SimpleDateFormat simpleDateFormat = new SimpleDateFormat("HH:mm:ss");            System.out.print(simpleDateFormat.format(date));            System.out.println("==>By SimpleDateFormat");        }        public static void main(String[] args) {            String filePath = "E:\\BaiduYunDownload\\MySQL";            VideoDuration videoDuration = new VideoDuration();                  videoDuration.getVideoDuration(filePath);        }    }

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If you have any questions or any bugs are found, please feel free to contact me.

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