live video streaming

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An Effective Live
Video Streaming System
Presented By Dileep Kumar
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INTRODUCTION

• Streaming video can be used for live or recorded
  events
• Provides truly interactive, on-demand audio and
  video
• No need for time taking downloads
• Corporate communications and training

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What is Streaming Technology
A technique for transferring data such that it
can be processed as a steady and continuous
stream, client does not have to download the
entire file to view it.
Data
Source
Network
The portion in the buffer
The portion client is viewing
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SYSTEM ARCHITECTURE
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Process Overview From Cameras to Consumers

Capture
Production
Encoding
Distribution
Viewing
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• Capture
• Capturing is using one or more cameras to record
  live action. It simply transforms the images of
  the live action into a digital format that you
  can work with in real time.
• Production
• It involves making shot selections and switching
  between cameras so your audience always sees the
  best angle. You might add special effects,
  narration, still images and music. In production,
  you transform your camera angles and live action
  into a finished, polished video that will hold
  the attention of a video-savvy audience.

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• Encoding
• In order to deliver a stream over the Web, the
  finished output of your live event must be
  converted from a video signal into a file format
  that is easier to distribute. You will likely use
  a robust online server system in the form of a
  Content Delivery Network (CDN) or Streaming
  Service Provider (SSP).
• Distribution
• Instead of the satellites, radio towers, and
  cable networks used to distribute broadcast
  content, video streams are transmitted over the
  Internet in formats that can be viewed on a wide
  variety of devices like computer screens, mobile
  phones, tablets, and set-top boxes.

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• Viewing
• Heres where you actually connect to your target
  audience. To optimize the viewing experience, you
  need your content to be accessible on whatever
  device each individual viewer chooses.

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Accessing Audio Video thru a Web server
Web Browser
HTTP
Web Server With Audio Files
Client
Files
Media Player
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Media Player or Helper Application
Three main streaming media Software RealPlayer
(RealNetworks), Media Player (Microsoft) and
QuickTime (Apple).
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3 types of delivery methods of streaming media

• Streaming Stored Audio and Video

• Streaming Live Audio and Video

• Real-Time Interactive Audio and Video

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Protocols

• RTSP Real Time Streaming Protocol

• RTP Real-time transfer Protocol

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RTP

• RTP is used to transmit real-time data

• RTP encapsulate segments

Payload Sequence Timestamp Synchronization
Misc type number
source identifier
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RTSP Operation
HTTP GET
Web Server
Web Browser
HTTP
Presentation Description File
Setup
Play
Media Player
Media Player
Media Stream
RTSP
Pause
Teardown
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ADVANTAGE

• Instant viewing
• No long download times
• Don't have to waste memory space on hard drive
• Use specific bandwidths
• More security of content publishing
• Provide service on demand

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DISADVANTAGE

• It is difficult to keep the service steady if
  the bandwidth is low
• The maintenance of streaming server is
  relatively expensive
• Packet loss may occur during the transmission

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APPLICATION

• Applications are utilizing this technology are
• Streaming Video, IP telephony, Internet Radio,
  Distance learning, Videoconferencing,
  Interactive games and so on

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CONCLUSION

• A receiver-based, peer-division multiplexing
  engine to deliver live streaming content on a
  peer-to-peer network. The same engine can be used
  to transparently build a hybrid P2P/CDN delivery
  network by adding Repeater nodes to the network.
  By analyzing a large amount of usage data
  collected on the network during one of the
  largest viewing events in Europe, we have shown
  that the resulting network can scale to a large
  number of users and can take good advantage of
  available uplink bandwidth at peers. We have also
  shown that error-correcting code and packet
  retransmission can help improve network stability
  by isolating packet losses and preventing
  transient congestion from resulting in PDM
  reconfigurations.

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REFERENCES

• 1 R. auf der Maur, ?Die Weiterverbreitung von
  TV- und Radioprogrammenüber IP-basierte Netze, in
  Entertainment Law, F. d. Schweiz, Ed., 1st ed.
  Bern, Switzerland Stämpfli Verlag, 2006.
• 2 Euro2008, UEFA Online. Available
  http//www1.uefa.com/ 3 S. Lin and D. J.
  Costello Jr., Error Control Coding, 2nd ed.
  Englewood Cliffs, NJ Pearson Prentice-Hall,
  2004. 3 S. Xie, B. Li, G. Y. Keung, and X.
  Zhang, ?CoolStreaming Design, theory, and
  practice, IEEE Trans. Multimedia, vol. 9, no. 8,
  pp. 16611671, Dec. 2007.
• 4 K. Shami et al., ?Impacts of peer
  characteristics on P2PTV networks scalability,?
  in Proc. IEEE INFOCOM, Apr. 2009, pp. 27362740.
• 5 Bandwidth test statistics across different
  countries, Bandwidth- Test.net Online.
  Available http//www.bandwidth-test.
  net/stats/country/
• 6 X. Hei, C. Liang, J. Liang, Y. Liu, and K. W.
  Ross, ?Insights into PPLive A measurement study
  of a large-scale P2P IPTV system, in Proc. IPTV
  Workshop, Int. World Wide Web Conf., May 2006.
• 7 B. Li et al., ?An empirical study of flash
  crowd dynamics in a P2Pbased live video streaming
  system, in Proc. IEEE GLOBECOM, 2008, pp. 15.
• 8 J. Rosenberg et al., ?STUNSimple traversal
  of User Datagram Protocol (UDP) through network
  address translators (NATs), RFC 3489, 1993.
• 9 A. Ali, A. Mathur, and H. Zhang,
  ?Measurement of commercial peer-to-peer live
  video streaming, in Proc. Workshop Recent Adv.
  Peer-to-Peer Streaming, Aug. 2006.

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Thanking You