Your SlideShare is downloading. ×
Apple's live http streaming
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

Apple's live http streaming

3,523

Published on

Review of Apples live HTTP Streaming technology

Review of Apples live HTTP Streaming technology

0 Comments
8 Likes
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total Views
3,523
On Slideshare
0
From Embeds
0
Number of Embeds
5
Actions
Shares
0
Downloads
2
Comments
0
Likes
8
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. Apple’s HTTP Live Streaming
  • 2. Agenda
    • System Overview
    • Components
    • Session
  • 3. Apple’s Note
    • Note: Many existing streaming services require specialized servers to distribute content to end users. It requires specialized skills to set up and maintain these servers, and in a large-scale deployment these servers can be costly. Apple has designed a system that avoids this by using standard HTTP to deliver the streams.
  • 4. System Overview
  • 5. Components Review
    • Server
      • Encoder
      • Segmenter
    • Distributer
      • Basic HTTP Server
    • Client
  • 6. Server
    • Receives Digital / Analog input stream
    • Encodes / Transcode video/audio
      • H.264 Video
      • AAC audio (HE-AAC or AAC-LC)
    • Encodes / Transcode audio only:
      • MPEG-2 elementary streams, HE-AAC or AAC-LC files, or MP3 files
    • Encapsulate in MPEG2
      • Transport Stream
      • Program Stream
  • 7. Segmenter
    • All segments should be with the same duration
    • All segments are placed in a separate file
    • Creates Index file with references to segment files
    • For protection, the Segmenter might encrypt each media segment and create a key file
  • 8. Distribution
    • Distribution system is a regular HTTP Server
    • Could be Apache or small embedded Server
  • 9. Files
    • Segments – stored as *.ts files
    • Index files – stored as *.m3u8
    • Index file format example:
    #EXTM3U #EXT-X-TARGETDURATION:10 #EXTINF:10, http://media.example.com/segment1.ts #EXTINF:10, http://media.example.com/segment2.ts #EXTINF:10, http://media.example.com/segment3.ts #EXT-X-ENDLIST
  • 10. Session types
    • Live Stream Broadcast
      • Index file is continues updated
      • Include a moving window of segments around “live” part of the session
      • Client should continuously refresh the Index file
    • VoD Session
      • Index file static
      • Includes ALL the segments of the file
      • Enables “Seek” operation
  • 11. Multi-bitrate multi–device support
    • Multi-bitrate is enabled via multiple index files
    • Index files are pointed by a global index files
    • Client can select a stream according to:
      • Device properties
      • Available bit rate
    • This method is less efficient than Silverlight Global File
  • 12. Test yourself
    • What are the two Live streaming file types?
    • What is the role of the Segmenter?
    • On which delivery protocol is the live streaming based?
  • 13. DSP-IP Contact information For Course materials licensing & lecture request contact: For projects development services contact:
      • Adi Yakov
      • Training and Courses Manager
      • [email_address]
      • +972-9-8651933
    www.dsp-ip.com Mail : [email_address] Phone: +972-9-8850956, Fax : +972-50- 8962910
      • Alona Ashkenazi
    • Technology Management Services : [email_address] +972-9-8850956

×