Posts Tagged ‘Red5’

RTMP – how it make YouTube?

October 7th, 2009 2 comments

There is a problem with RTMP. It works on 1935 port. In fact it’s not a problem with RTMP but with ISP. ISP like filtering internet traffic and like packets queuing. That’s why connections on port 1935 – which is not wheel – known in Internet – work worse than connection on port 80. Adobe know that and have introduced RTMPT, which is an encapsulation of RTMP in HTTP, which works on port 80.

YouTube does something else. You see, You Tube allows recording from web cam. It uses RTMP to do that, but RTMP works on HTTP (80) port. I noticed it by using NetLimiter.

I decided to check it carefully. Is it RTMP on its unusual port or is it usual RTMPT? Using Wireshark as my oxygen supply, I dove deep in the hidden depths of the system. Wireshark allows me to sniff internet traffic. I was wondering what exactly my laptop send to YouTube. I would have expected many POST requests for RTMPT. There weren’t. It was something like

instead. rtmp:/… – 99% YouTube use RTMP on port 80.

It’s an interesting idea. I can check it out to give me an idea of how to write similar routines.


Categories: Uncategorized Tags: ,

Red5 and JPA with Maven2

May 27th, 2009 7 comments
This article tells you how to build an application for Red5 server with Maven2. We are going to use Spring, JPA, Hibernate and PostgreSQL database. We aren’t going to use any IDE, instead we are going to use only Bash commands. I will run it on the FreeBSD server. The task of the application is not important. It’s very simple. It’s going to be a Hello World program. The application is going to check if a user has a permission to publish a video on Red5 server. The permission is granted based on sender’s IP address. Accepted IPs are stored in a PostgreSQL database. And, the best thing is that I have already written and published the app, so I’m going to write about a ready product. Let’s get started. My server has already installed:
  • Java 1.6 (Diablo JDK)
  • Maven 2.0.9
  • PostgreSQL 8.3
You have to get the application sources from SVN:  
svn checkout jakubiak-red5-read-only
    This way, you get sources of jakubiak-red5 project, which include our example application. jakubiak-red5 project is linked to Red5 sources using svn:externals. This mean, Red5 sources are downloaded together with my project. Now it’s time for the first compilation. Thanks to a Marcello Teodorii’s contribution the application is built without any problems.  
cd jakubiak-red5-read-only/jakubiak-red5-pom/
mvn clean install
    Now, maven starts getting dependencies for the application from the Internet. It can take some time. After downloading, we have to wait for compilation of about 700 Java classes. At the end, we will see a success message. (As you can see, I have been waiting 16 minutes, however it’s built much faster for second time.) Now, you have to create PostgreSQL a database and a user. As a password type demojpa.  
createuser -h localhost -U pgsql -S -D -R -P demojpa
createdb -h localhost -U pgsql -O demojpa demojpa
    You have to create the database now, because it’s necessary for compiling and testing the application.  
cd ../jakubiak-red5-demo-jpa/
mvn clean install
    You have to wait few minutes. You have just built the application. The result of maven tasks is a war file. You have to deploy the war file on Apache Tomcat. I prefer 6.0.18 version.  
cd ../..
wget ""
tar xvfz apache-tomcat-6.0.18.tar.gz
cp jakubiak-red5-read-only/jakubiak-red5-demo-jpa/target/tomcat/webapps/jakubiak-red5-demo-jpa-war.war apache-tomcat-6.0.18/webapps/
    You make Tom cat do it’s job. Mrrrau :)  
cd apache-tomcat-6.0.18/
tail -f logs/catalina.out
    In Tomcat log we are looking for a success. It’s time for testing. You have to start a web browser:  
    It loads a standard application distributed with Red5 – publisher. In “Location” field type:  
    RTMP is a protocol used by Flash applications. “demojpa” is an accessible name of our application. Press “Connect” button. On the “Settings” tab you have to select a web camera and a microphone. You have to test publishing. It shouldn’t work, because your IP address doesn’t have permission for the application. We can find a warning message in Apache Tomcat logs. You have to put your IP address in the database.  
psql -h localhost -U demojpa
INSERT INTO hostallow VALUES ( '' );
    Let’s go back to the web browser. Now, you can publish the video and admire the results. Now you have a working application. It’s time for you to learn.  
find . -type f | egrep -v .svn
    From the beginning, StreamPublishSecurityTest – is a Java class for testing sensitive code in your application. HostAllow is a JPA entity class defining a table in the database. DemojpaApplicationAdapter defines a starting point for Red5 application, where I have placed a code enabling the security rules. StreamPublishSecurity is a real worker class – it checks the security rules against the database. Next: persistence.xml is a file for JPA, you put entity classes there. red5-services.xml is a very important file, where we you configure Spring beans used by your application. There are also definitions of the database connection. Also, you can put Red5 remote services there. logback.xml is a log system configuration. red5-core.xml, red5-common.xml, beanRefContext.xml and defaultContext.xml are configuration files for Spring beans used by Red5. If you want to improve Red5 this is the place to hack. red5-web.xml is a file where you can change RTMP name of your application – “demojpa”. is a file with database properties. demojpa-servlet.xml is a file for defining MVC controllers of your web application. web.xml is the most important file for war archive, it defines web application components. We have dealt with publisher.swf earlier. pom.xml is a magic Maven file, which describes how maven has to build the application. Cool, isn’t it?
Categories: Java Tags: , , , ,

jakubiak-red5 modularization

April 22nd, 2009 6 comments

Recently a new programmer Marcello Teodori has joined to jakubiak-red5 project and he has done very good job. He has split jakubiak-red5 project into new modules. He has extracted tomcat, jetty and scripting from the core module. Thanks to that the core module is lighter and it has less irritating dependencies. It was extremely important to remove to Groovy dependencies from core, because it was a lot of jars.

Jakubiak-Red5 it’s a project whose aim is standardization of building Red5 server using maven2. By using jakubiak-red5 it’s easier to build enterprise application which use Red5. This project provides maven pom files. Red5 sources remain intact, they are linked with svn:externals.

In future I would really like to make it possible to run a reduced to minimum version of Red5 using Java Web Start. Thanks to that, it would be possible to record a video from a webcam in a high quality. However, as for now, I still can’t do it.

In its beginnings Jakubiak-Red5 was my experimental project, and that’s why it’s called this way. Soon, the prefix “Jakubiak” will have to be removed, because it’s no longer only my project and new programmers contribute a lot to it. Thanks Marcello!!!

Categories: Java Tags: , ,

Maven2 + Red5 + Xuggle

February 26th, 2009 6 comments


This time I would like to invite you to my project jakubiak-red5, the purpose of which is the combination of the following technologies : Red5, Xuggle and Maven2. Xuggle is a tool for the conversion of video images in real-time. Red5 is a server of multimedia applications. Maven2 is the most efficient tool for organizing the process of building applications. My goal is to combine them all together.


My project is ,in fact it is a building script. It is supposed to be an instruction for Maven2 on how to build server Red5 and a (Java) part of Xuggle library. Let’s have a look on how it works. In SVN repository there is a structure of the Maven project, along with the files pom.xml. The source code of Red5 and Xuggle libraries does not change because it is connected to the source code of the original projects using svn:externals. All you need to do in order to build a project is to write mvn clean install. I assume that each Java programmer is already a fan of Maven or will become such in a future, so there is no need to dwell on it any more.

The results of work are the dependencies that can be used in a new project – a new Red5 based application (or Red5 and Xuggle based).

Welcome to a battle-field!

What we need is Xuggle. The installation of Xuggle Instalacja Xuggle jest prosta seems to be suprisingly simple, compared to the capability of this library (at least for Windows) Setup.exe.

The next installation is Red5. I recommend you to try wersje 0.8RC2 version. Again, follow the procedure setup.exe. For Windows you will need a 32-bit Java.

One more thing – a binary Maven2. Download, unzip and try out.

Finally, you need to download the sources of my project:

svn checkout jakubiak-red5-read-only


This command is supposed to download the sources of my project as well as the sources of Red5 server, and partly the sources of Xuggle project. Now it’s time for a testing compilation:

cd jakubiak-red5-pom/
mvn clean install
cd ../jakubiak-xuggle-pom/
mvn clean install


Yet, before we can finally see this long expected message, we need to use the Internet to download a few dependencies which, for a couple of reasons, might not be found in depositories and they are not downloaded automatically.

It’s a testing time now. You need to publish on the Red5 server the examples build by my script ; in other words, just copy the directories:

cp -r jakubiak-red5-oflaDemo/target/jakubiak-red5-oflaDemo-0.8-SNAPSHOT/ ../../Program Files (x86)/Red5/webapps/
cp -r jakubiak-xuggle-xuggler-red5-videotranscoder/target/jakubiak-xuggle-xuggler-red5-videotranscoder-1.0-SNAPSHOT/ ../../Program Files (x86)/Red5/webapps/
net start Red5


Once we start up the internet browser, we can try out a few examples:

If we want to see Xuggle “in action”, we need to connect to the application videotranscoder: rtmp://localhost/videotranscoder using the Publisher program. The name of the stream should be preceded by a prefix “xuggle_“.

My library Jakubiak-red5 to some extend replaces the usual building process. Red5 and Xuggle are built by means of Apache Ant and Ivy (I am genuinely thrilled hearing these names). I, on the other hand, prefer building them using Maven2. It is quite a complex and time-consuming process, yet it is definitely worth the shot, because it enables me to create applications combining lots of fascinating technologies, for example: JPA, Spring. I can also create the WAR application including Red5 and Xuggle, which will then be started up on Apache Tomcat 6. Moreover, I can enjoy working with Eclipse IDE. To sum up, it offers lots of opportunities.

However, the most significant fact is that my library does not modify the sources of Xuggle and Red5 projects.

One of the alternatives to my building script would be to add the libraries of JAR, Red5 and Xuggle straight to the Maven repository. But, this method will not be sufficient in building WAR version of Red5 application. WAR version is extremely useful, but I will return to this issue next time.

Categories: Java Tags: , , ,

How to start Xuggle at Red5

February 2nd, 2009 12 comments
A big breakthrough today – I finally managed to start a Xuggle demo on the server Red5. I am really proud of this, because this kind of technologies will have a tremendous impact on further advancement in the Internet world. I have already given the details of the functioning of the tandem Xuggle and Red5. Now it is time to present how I have activated Xuggle and Red5 on my computer with Windows Vista64bit. I began with downloading and installing the latest version of the server Red5 – 0.8RC2. Of course I also installed the Xuggle. All the Widnows versions are really easy to install – by using the command: Setup.exe and restarting a computer. What I did next was to create an web application archive, consisting of the following files:

All the useful files can be found here:
I then saved my application in the folder webapps in the server Red5. Using the 32bit version of Java I started the server Red5. I also set the environment variables:  
$ export | grep HOME
declare -x JAVA_HOME="C:\Program Files\Java\jdk1.6.0_10"
declare -x RED5_HOME="C:\Program Files (x86)\Red5"
declare -x XUGGLE_HOME="C:\Program Files (x86)\Xuggle"
    I started red5: red5.bat. For testing I used the demo application from the server Red5 – Publisher. http://localhost:5080/demos/publisher.html. It is important to remember to connect to the videotranscoder application rather than oflaDemo. All other settings do not require any changes. I just turn on the camera and the microphone and begin a video session. The name of the stream is antek. In order to see the results of Xuggle operations I start the option “View”. The name is xuggle_antek. After severals hours of trials and errors and using Art Clarke I got it! I’ve finally seen my “second nature” – my second faceJ Thanks a lot, Art! In the next chapter I’m going to explain how to programme Xuggle using Eclipse and Maven 2. However, first I have to learn how to do it and, most importantly, EAT SOMETHING!
Categories: Java Tags: , ,

Xuggle + Red5 = Hello World

February 2nd, 2009 5 comments

I finally got it ! I managed to activate an example of the class Hello Word in tandem with Xuggle and Red5.

Now, how does it work? In the internet browser I start the application which publishes the image from the digital camera of my laptop. This image is then being converted (processed?) on the server by means of Xuggle. In this way the net surfers are able to see in their browsers the target image that has been processed by a server. Welcome to the new era in the multimedia web applications!

It seems to me that this application opens a window of new, amazing opportunities. For example, we can image a video conference which allows the participants to see each other’s if they were actually sitting together at one table:). Another possibility might be the server recognizing the users face and, as a result, greeting him with his name, nickname or some other familiar phrase. Or, for example, let’s say we visit the tourist agency website. We start our laptop’s web cam and, after a while, we could see the blissful image of ourselves resting in a hammock hanging between trees on the beautiful beach far away.

There is no doubt that the image of lying in a hammock is far more tempting than sitting at the computer desk. But let’s go back to details. What is actually going on in the server area? The server – Red5 – receives the video from the user. This video is in the form of a data stream. It might contain an image, music or other data. The video stream is, of course, compressed. The server’s is now required to decompress it so that we receive the successive shots (and this is the task performed by Xuggle and FFmpeg). In fact it reminds of the old-fashioned film tape, which has still been in use for movie-making in Hollywood.

As a result of a video’s decompression we receive a sequence of pictures. What the server does next depends entirely of the imagination and goals of the web-site designers. Then the server compresses the sequence of pictures, thus creating a brand new video – a new data stream. The server can save the results of its operation, or create and access enabling an online transfer.

Obviously this method can be also used for the processing of sound. For instance, we can introduce some changes in popular communicators, such as Skype by adding the users’ favourite music to the background, or creating other sounds typical for cafe, pub or other popular meeting places.

As you can see, the server, which is supposed to perform so many tasks, may be overloaded: it is responsible for decompression and compression of the audio / video stream, as well as processing images or sounds. During the system testing , the overload of my laptop went up to 10%. However, we should keep in mind that the server is performing a new operation, something that has never been done before . Something that might actually become a key to success. Personally I am convinced that the expected results are worth its costs, and it pays off to risk an occasional overload.

In my next article I am going to explain how to start and application Xuggle Hello World on the server Red5.

Categories: Java Tags: , ,

Red5 – the installation of administrator’s pane

February 2nd, 2009 12 comments

Briefly speaking, Red5 is a server of the multimedia web applications. It is undoubtedly booming right now; I have just managed to start the administrator’s panel and, since it is a complicated process, I find it reasonable to describe it here in order to remember it well.

The first step is to load the latest version of Red5 0.8RC2 from the website Xuggle . Then I install it according to instructions: I unzip and set the environment variables RED5_HOME. The next thing to do is to start the Installer application : http://localhost:5080/installer/, install the administer application and restart Red5. Thereafter, following the instructions provided on forum, I register at: http://localhost:5080/admin/register.html After registration I move to restarting Red5 again. Now I can finally log in: http://localhost:5080/demos/adminPanel.html

Using the administrator’s panel I can view the list of active applications, find the active online users or check the transfer.

Categories: Java Tags: , ,