This presentation talks about our experience with implementing Videocalling functionality via your web browser in a Ruby on Rails, JavaScript, Flash and Red5 web stack.

1. Videocalls via web
@pavolko
@bonetics

2. Goal

3. Stack:
• Ruby on rails
• JS
• Flash
– capturing video and streaming to Red5
• Red5
– open source media server
• publishing, playing, recording streams

4. Architecture overview
Red5
Persistentconn
Flash
RoR
JavaScript Flash
RoR
JavaScript
User A
User B
... Persistentconn

5. JS - Flash

6. Flash – Red5
Red5Flash
red5-web.xml
getConnection().call(
"signalisation.someMethod",
args...
);
ServiceUtils.invokeOnConnection(
conn,
"callSomething",
new Object[] { "value"}
);

7. Red5
• extend MultiThreadedApplicationAdapter
• provides all you need from scratch
– connect
– publish stream
– play stream
– disconnect

8. Let’s stream
• publish to Red5:
– ns = new NetStream(getConnection());
– ns.attachCamera(getCamera());
– ns.attachAudio(getMicrophone());
– ns.publish(name); #string of your desire
• play from Red5:
– ns.play(name); #string
– video.attachNetStream(ns);
• google knows details

9. fail: Complicated stack
• they say think twice
• well you better think a lot
– chances are you must change code in JS,F,Red5

10. fail: Corporate environment
• I am an admin and my job is to block ports
– HTTP Tunneling out-of-box support
• connect 1935 port (default)
• connect 80 if it fails
• timeout problem if port blocked
– shotgun method

11. fail: Persistence
• Non-persistent approach
• Flash:
– is anybody calling me?
– is anybody calling me?
– is anybody calling me? yup
• is he still calling?
• is he still calling?
• wrong

12. Rooms concept
• red5url.com/room1
– share resources within room1
– acts as standalone Red5 instance
R1
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R2
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13. Thanks
• we are hiring hq@bonetics.com