What is hls streaming

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What is HLS

• Intro to HTTP Streaming

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What is HLS?

• HTTP Live Streaming (also known as HLS) is an
  HTTP-based media streaming communications
  protocol implemented by Apple Inc to deliver
  video to Apple devices like the iPad and iPhone.

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How does HLS work?

• HLS breaks MP4 video content into 10-second
  segments
• These segments are then carried to their
  destination via HTTP which allows the HLS
  streaming server to be accessed by an array of
  devices
• Latency varies between 15 and 30 seconds

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HLS Adaptive Bit Rate Streaming Model
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Pros of using the HLS protocol

• All-device delivery
• Excellent quality
• Cost efficient

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Cons of using the HLS protocol

• Latency
• Content Protection

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Technical overview

• HLS streams are generated on the fly and stored
  on an HTTP server.
• The HTTP server also creates a .M3U8 playlist
  file (also called a manifest file) that serves as
  an index for the video chunks.
• HLS doesnt natively support digital rights
  management (DRM) though you can encrypt the data
  and provide key access using HTTPS
  authentication.

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Alternatives to HLS Live Streaming

• RTMP Real-Time Messaging Protocol, or RTMP for
  short, was designed at the turn of the millennium
  specifically for audio and video streaming.
• HDS HDS, or HTTP Dynamic Streaming is a
  futuristic streaming format created by Adobe,
  intended to be used along with Flash. It hasnt
  gained as much relative momentum, however.
• MPEG-DASH One of the most recently innovated
  protocols, MPEG-DASH presents many merits.
  Entirely HTTP-based, it allows broadcasters to
  implement its framework faster than ever before.

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Conclusion

• With mobile devices quickly shrouding larger
  screens across the world, HLS becomes
  significant. Another point to note is that HTML5
  video players do not pair with RTMP or HDS. HLS
  then becomes the sole option.

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