Here is the translation of your text into English:
For example, getting the duration of an FLV file — if a video can play for 2 minutes in total, then this 2 minutes is the duration. How to get it and implement it in Java?
---
### Problem Supplement:
a881127b wrote the solution: Call a DLL file. As long as you find a DLL that can parse the playback duration well, then call it using JNI (Java Native Interface). You can use C++ or Delphi; as long as it works, it's OK. Place the DLL in the BIN directory.
```java
public class CtrlFtpFile {
// Load the Dll
static {
System.loadLibrary("GetPlayTime");
}
public native String getMediaTime(String arg);
public static void main(String[] args) {
CtrlFtpFile hw = new CtrlFtpFile();
// System.out.println(hw.getMediaTime("D:\\TDDOWNLOAD\\小强.mp3"));
System.out.println(hw.getMediaTime("file:///G:/tomcat/apache-tomcat-6.0.18/webapps/mbs/ftp/0/real/B1224487037153.mpeg"));
// file:///G:\tomcat\apache-tomcat-6.0.18\webapps\mbs\ftp\0/real/B1224487037153.mpeg
}
}
```
Attachment link: [http://a881127b.iteye.com/blog/724516](http://a881127b.iteye.com/blog/724516)
You could explain it more specifically with step-by-step instructions because I am still unclear and couldn't make it work after trying for a while.
---
### Solution Approach:
Call the DLL file. The member name cannot be the same as its enclosing type. As long as you find a DLL that can parse the playback duration well, then call it using JNI (Java Native Interface). You can use C++ or Delphi; as long as it works, it's OK. Place the DLL in the BIN directory.
```java
public class CtrlFtpFile {
// Load the Dll
static {
System.loadLibrary("GetPlayTime");
}
public native String getMediaTime(String arg);
public static void main(String[] args) {
CtrlFtpFile hw = new CtrlFtpFile();
// System.out.println(hw.getMediaTime("D:\\TDDOWNLOAD\\小强.mp3"));
System.out.println(hw.getMediaTime("file:///G:/tomcat/apache-tomcat-6.0.18/webapps/mbs/ftp/0/real/B1224487037153.mpeg"));
// file:///G:\tomcat\apache-tomcat-6.0.18\webapps\mbs\ftp\0/real/B1224487037153.mpeg
}
}
```
Attachment link: [http://a881127b.iteye.com/blog/724516](http://a881127b.iteye.com/blog/724516)
---
### Reference:
For obtaining the resolution and playback duration of a video file in PowerBuilder (PB), refer to: [How PB retrieves the resolution and playback duration of a video file](http://www.myexception.cn/pb/240155.html).
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