Calculating video file duration

Hi all,

I'm searching a java library to calculate video file duration for all possible video formats (flv, mpeg, avi, mp4).
I've tried "getDuration()" (class player" into package javax.media) but it's wrong for my porpouse.

Peraphs jffmpeg (net.sourceforge.jffmpeg.VideoDecoder)?
Has someone ever tried it?
where can i Find some explampe code?

Thank you,
bye

Andrea

resolved

Welcome to the Ranch and well done

but please tell us how you did it.

Hi,

I've used ffmpeg.exe. I execute this file and it returns a string with duration value inside.
There is ffmpeg version also for Mac and I select to execute ffmpeg.exe or ffmpeg according to os version.
Here the code:

public static String GetDuration(final String sVideoInput) 
        throws URISyntaxException, ZipException, IOException 
    { 
        final URI uri; 
        final URI exe; 
        String res = "";
        String osType = "";
        String res = "";
        
        try
        {
            uri = getJarURI(); 
            osType= System.getProperty("os.name");
            if(osType.substring(0, 3).equalsIgnoreCase("win"))
            {
                //if win
                // getFile get ffmpeg.exe and copy it in a temp directory
                exe = getFile(uri, "ffmpeg.exe"); 
                res = exe.toString().replaceFirst("file:/C:", "C:");        
            }
            else
            {
                //if mac
                // getFile get ffmpeg and copy it in a temp diretory
                exe = getFile(uri, "ffmpeg"); 
                res = exe.toString().replaceFirst("file:", "");
            }

System.out.println(res);

try
        {
            Process child = null;
            if(osType.substring(0, 3).equalsIgnoreCase("win"))
            {
                child = Runtime.getRuntime().exec("C:/Temp/ffmpeg.exe"  + " -i \"" + sVideoInput + "\"");             
            }
            else
            {
                // IMPORTANT: for Mac, I need to execute  ffmpeg inside a file sh, not directly from command line
                File cmd = File.createTempFile("aaa", "sh");
                Writer w =  new BufferedWriter(new FileWriter(cmd)); 
                w.write(res + " -i " + sVideoInput);
                w.close();
                cmd.canExecute();
                cmd.canRead();
                cmd.deleteOnExit();
                String cmdPath = cmd.getAbsolutePath();
                //System.out.println(cmdPath);
                child = Runtime.getRuntime().exec(new String[]{"/bin/sh", cmdPath});
            }

InputStream lsOut = lsOut = child.getErrorStream();
            InputStreamReader isr = new InputStreamReader(lsOut);
            BufferedReader in = new BufferedReader(isr);

// parsing .exe output to find info for duration:
            String line;
            while ((line = in.readLine()) != null)
            {
                if(line.contains("Duration:"))
                {
                    line = line.replaceFirst("Duration: ", ""); 
                    line = line.trim();
                    
                    res = line.substring(0, 11);
                    System.out.println("DURATA: " + res);
                    break;
                }
                        
            }

// return ffmpeg path or extract if from a jar file. 
private static URI getFile(final URI where, final String fileName) 
        throws ZipException, IOException 
    { 
        final File location; 
        final URI fileURI;

location = new File(where);

// ffmpeg is not in a JAR, just return the path on disk 
        if(location.isDirectory()) 
        { 
            fileURI = URI.create(where.toString() + fileName); 
        } 
        else 
        { 
            final ZipFile zipFile; 
            zipFile = new ZipFile(location); 
            try 
            { 
                fileURI = extract(zipFile, fileName); 
            } 
            finally 
            { 
                zipFile.close(); 
            } 
        }

return (fileURI); 
    }

private static URI getJarURI() 
        throws URISyntaxException 
    { 
        final ProtectionDomain domain; 
        final CodeSource source; 
        final URL url; 
        final URI uri;

domain = MFCSFtpClient.class.getProtectionDomain(); 
        source = domain.getCodeSource(); 
        url = source.getLocation(); 
        uri = url.toURI();

return (uri); 
    }

// extract ffmpeg from a Jar file and copy it in a temp directory.
private static URI extract(final ZipFile zipFile, final String fileName) 
        throws IOException 
    { 
        final File tempFile; 
        final ZipEntry entry; 
        final InputStream zipStream; 
        OutputStream fileStream;

tempFile = File.createTempFile(fileName, "");
        tempFile.deleteOnExit(); 
        
        entry = zipFile.getEntry(fileName);

if(entry == null) 
        { 
            throw new FileNotFoundException("cannot find file: " + fileName + " in archive: " + zipFile.getName()); 
        }

zipStream = zipFile.getInputStream(entry); 
        fileStream = null;

try 
        { 
            final byte[] buf; 
            int i;

fileStream = new FileOutputStream(tempFile); 
            buf = new byte[1024]; 
            i = 0; 
            while((i = zipStream.read(buf)) != -1) 
            { 
                fileStream.write(buf, 0, i); 
            } 
        } 
        finally 
        { 
            fileStream.flush();
            close(zipStream); 
            close(fileStream);
            
            tempFile.setExecutable(true, true);
            //tempFile.canExecute();
        }

return (tempFile.toURI()); 
    }

Bye,
andrea

Thank you very much. I have added code tags, which improve your post. Don’t use [b] or similar tags inside code tags.