How to download videos from youtube on java? [closed]

Question

how to download videos from youtube on Java? need class(or piece of code) which describes how to do that. Thank you.

Answer 1

import java.io.BufferedReader; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.Reader; import java.io.StringWriter; import java.io.UnsupportedEncodingException; import java.io.Writer; import java.net.URI; import java.net.URISyntaxException; import java.util.ArrayList; import java.util.List; import java.util.Scanner; import java.util.logging.Formatter; import java.util.logging.Handler; import java.util.logging.Level; import java.util.logging.LogRecord; import java.util.logging.Logger; import java.util.regex.Pattern;  import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.NameValuePair; import org.apache.http.client.CookieStore; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpGet; import org.apache.http.client.protocol.ClientContext; import org.apache.http.client.utils.URIUtils; import org.apache.http.client.utils.URLEncodedUtils; import org.apache.http.impl.client.BasicCookieStore; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.message.BasicNameValuePair; import org.apache.http.protocol.BasicHttpContext; import org.apache.http.protocol.HttpContext;  public class JavaYoutubeDownloader {   public static String newline = System.getProperty("line.separator");  private static final Logger log = Logger.getLogger(JavaYoutubeDownloader.class.getCanonicalName());  private static final Level defaultLogLevelSelf = Level.FINER;  private static final Level defaultLogLevel = Level.WARNING;  private static final Logger rootlog = Logger.getLogger("");  private static final String scheme = "http";  private static final String host = "www.youtube.com";  private static final Pattern commaPattern = Pattern.compile(",");  private static final Pattern pipePattern = Pattern.compile("\\|");  private static final char[] ILLEGAL_FILENAME_CHARACTERS = { '/', '\n', '\r', '\t', '\0', '\f', '`', '?', '*', '\\', '<', '>', '|', '\"', ':' };   private static void usage(String error) {   if (error != null) {    System.err.println("Error: " + error);   }   System.err.println("usage: JavaYoutubeDownload VIDEO_ID DESTINATION_DIRECTORY");   System.exit(-1);  }   public static void main(String[] args) {   if (args == null || args.length == 0) {    usage("Missing video id. Extract from http://www.youtube.com/watch?v=VIDEO_ID");   }   try {    setupLogging();     log.fine("Starting");    String videoId = null;    String outdir = ".";    // TODO Ghetto command line parsing    if (args.length == 1) {     videoId = args[0];    } else if (args.length == 2) {     videoId = args[0];     outdir = args[1];    }     int format = 18; // http://en.wikipedia.org/wiki/YouTube#Quality_and_codecs    String encoding = "UTF-8";    String userAgent = "Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.13) Gecko/20101203 Firefox/3.6.13";    File outputDir = new File(outdir);    String extension = getExtension(format);     play(videoId, format, encoding, userAgent, outputDir, extension);    } catch (Throwable t) {    t.printStackTrace();   }   log.fine("Finished");  }   private static String getExtension(int format) {   // TODO   return "mp4";  }   private static void play(String videoId, int format, String encoding, String userAgent, File outputdir, String extension) throws Throwable {   log.fine("Retrieving " + videoId);   List<NameValuePair> qparams = new ArrayList<NameValuePair>();   qparams.add(new BasicNameValuePair("video_id", videoId));   qparams.add(new BasicNameValuePair("fmt", "" + format));   URI uri = getUri("get_video_info", qparams);    CookieStore cookieStore = new BasicCookieStore();   HttpContext localContext = new BasicHttpContext();   localContext.setAttribute(ClientContext.COOKIE_STORE, cookieStore);    HttpClient httpclient = new DefaultHttpClient();   HttpGet httpget = new HttpGet(uri);   httpget.setHeader("User-Agent", userAgent);    log.finer("Executing " + uri);   HttpResponse response = httpclient.execute(httpget, localContext);   HttpEntity entity = response.getEntity();   if (entity != null && response.getStatusLine().getStatusCode() == 200) {    InputStream instream = entity.getContent();    String videoInfo = getStringFromInputStream(encoding, instream);    if (videoInfo != null && videoInfo.length() > 0) {     List<NameValuePair> infoMap = new ArrayList<NameValuePair>();     URLEncodedUtils.parse(infoMap, new Scanner(videoInfo), encoding);     String token = null;     String downloadUrl = null;     String filename = videoId;      for (NameValuePair pair : infoMap) {      String key = pair.getName();      String val = pair.getValue();      log.finest(key + "=" + val);      if (key.equals("token")) {       token = val;      } else if (key.equals("title")) {       filename = val;      } else if (key.equals("fmt_url_map")) {       String[] formats = commaPattern.split(val);       for (String fmt : formats) {        String[] fmtPieces = pipePattern.split(fmt);        if (fmtPieces.length == 2) {         // in the end, download somethin!         downloadUrl = fmtPieces[1];         int pieceFormat = Integer.parseInt(fmtPieces[0]);         if (pieceFormat == format) {          // found what we want          downloadUrl = fmtPieces[1];          break;         }        }       }      }     }      filename = cleanFilename(filename);     if (filename.length() == 0) {      filename = videoId;     } else {      filename += "_" + videoId;     }     filename += "." + extension;     File outputfile = new File(outputdir, filename);      if (downloadUrl != null) {      downloadWithHttpClient(userAgent, downloadUrl, outputfile);     }    }   }  }   private static void downloadWithHttpClient(String userAgent, String downloadUrl, File outputfile) throws Throwable {   HttpGet httpget2 = new HttpGet(downloadUrl);   httpget2.setHeader("User-Agent", userAgent);    log.finer("Executing " + httpget2.getURI());   HttpClient httpclient2 = new DefaultHttpClient();   HttpResponse response2 = httpclient2.execute(httpget2);   HttpEntity entity2 = response2.getEntity();   if (entity2 != null && response2.getStatusLine().getStatusCode() == 200) {    long length = entity2.getContentLength();    InputStream instream2 = entity2.getContent();    log.finer("Writing " + length + " bytes to " + outputfile);    if (outputfile.exists()) {     outputfile.delete();    }    FileOutputStream outstream = new FileOutputStream(outputfile);    try {     byte[] buffer = new byte[2048];     int count = -1;     while ((count = instream2.read(buffer)) != -1) {      outstream.write(buffer, 0, count);     }     outstream.flush();    } finally {     outstream.close();    }   }  }   private static String cleanFilename(String filename) {   for (char c : ILLEGAL_FILENAME_CHARACTERS) {    filename = filename.replace(c, '_');   }   return filename;  }   private static URI getUri(String path, List<NameValuePair> qparams) throws URISyntaxException {   URI uri = URIUtils.createURI(scheme, host, -1, "/" + path, URLEncodedUtils.format(qparams, "UTF-8"), null);   return uri;  }   private static void setupLogging() {   changeFormatter(new Formatter() {    @Override    public String format(LogRecord arg0) {     return arg0.getMessage() + newline;    }   });   explicitlySetAllLogging(Level.FINER);  }   private static void changeFormatter(Formatter formatter) {   Handler[] handlers = rootlog.getHandlers();   for (Handler handler : handlers) {    handler.setFormatter(formatter);   }  }   private static void explicitlySetAllLogging(Level level) {   rootlog.setLevel(Level.ALL);   for (Handler handler : rootlog.getHandlers()) {    handler.setLevel(defaultLogLevelSelf);   }   log.setLevel(level);   rootlog.setLevel(defaultLogLevel);  }   private static String getStringFromInputStream(String encoding, InputStream instream) throws UnsupportedEncodingException, IOException {   Writer writer = new StringWriter();    char[] buffer = new char[1024];   try {    Reader reader = new BufferedReader(new InputStreamReader(instream, encoding));    int n;    while ((n = reader.read(buffer)) != -1) {     writer.write(buffer, 0, n);    }   } finally {    instream.close();   }   String result = writer.toString();   return result;  } }  /**  * <pre>  * Exploded results from get_video_info:  *   * fexp=90...  * allow_embed=1  * fmt_stream_map=35|http://v9.lscache8...  * fmt_url_map=35|http://v9.lscache8...  * allow_ratings=1  * keywords=Stefan Molyneux,Luke Bessey,anarchy,stateless society,giant stone cow,the story of our unenslavement,market anarchy,voluntaryism,anarcho capitalism  * track_embed=0  * fmt_list=35/854x480/9/0/115,34/640x360/9/0/115,18/640x360/9/0/115,5/320x240/7/0/0  * author=lukebessey  * muted=0  * length_seconds=390  * plid=AA...  * ftoken=null  * status=ok  * watermark=http://s.ytimg.com/yt/swf/logo-vfl_bP6ud.swf,http://s.ytimg.com/yt/swf/hdlogo-vfloR6wva.swf  * timestamp=12...  * has_cc=False  * fmt_map=35/854x480/9/0/115,34/640x360/9/0/115,18/640x360/9/0/115,5/320x240/7/0/0  * leanback_module=http://s.ytimg.com/yt/swfbin/leanback_module-vflJYyeZN.swf  * hl=en_US  * endscreen_module=http://s.ytimg.com/yt/swfbin/endscreen-vflk19iTq.swf  * vq=auto  * avg_rating=5.0  * video_id=S6IZP3yRJ9I  * token=vPpcFNh...  * thumbnail_url=http://i4.ytimg.com/vi/S6IZP3yRJ9I/default.jpg  * title=The Story of Our Unenslavement - Animated  * </pre>  */ 

Answer 2

I know i am answering late. But this code may useful for some one. So i am attaching it here.

Use the following java code to download the videos from YouTube.

package com.mycompany.ytd;

import java.io.File;
import java.net.URL;
import com.github.axet.vget.VGet;

/**
 *
 * @author Manindar
 */
public class YTD {

    public static void main(String[] args) {
        try {
            String url = "https://www.youtube.com/watch?v=s10ARdfQUOY";
            String path = "D:\\Manindar\\YTD\\";
            VGet v = new VGet(new URL(url), new File(path));
            v.download();
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
}

Add the below Dependency in your POM.XML file

        <dependency>
            <groupId>com.github.axet</groupId>
            <artifactId>vget</artifactId>
            <version>1.1.33</version>
        </dependency>

Hope this will be useful.

Answer 3

Regarding the format (mp4 or flv) decide which URL you want to use. Then use this tutorial to download the video and save it into a local directory.