Google Cast

Source: Wikipedia, the free encyclopedia.

Google Cast
Developed byGoogle
IntroducedJuly 24, 2013; 10 years ago (2013-07-24)
Websitewww.google.com/intl/en_us/chromecast/built-in/ Edit this at Wikidata

Google Cast is a proprietary protocol developed by Google for playing locally stored or Internet-streamed audiovisual content on a compatible consumer device. The protocol is used to initiate and control playback of content on digital media players, high-definition televisions, and home audio systems using a mobile device, personal computer, or smart speaker. The protocol was first launched on July 24, 2013, to support Google's first-generation Chromecast player.[1] The Google Cast SDK was released on February 3, 2014, allowing third parties to modify their software to support the protocol.[2] According to Google, over 20,000 Google Cast-ready apps were available as of May 2015. Support for Google Cast has since been integrated into subsequent devices, such as the Nexus Player and other Android TV devices (such as televisions), as well as soundbars, speakers, and later models of the Chromecast. Consumer devices that natively support the protocol are marketed as Chromecast built-in.[3] As of October 2017, over 55 million Chromecasts and Chromecast built-in devices have been sold.[4]

Operation

Google Cast receivers can stream content via two methods: the first employs

web apps that support the Google Cast technology; the second allows mirroring of content from the web browser Google Chrome running on a personal computer, as well as content displayed on some Android devices.[5] In both cases, playback is initiated through the "cast" button on the sender device.[6]

Sender devices previously needed to be connected to the same Wi-Fi network as a Google Cast receiver device to cast content,[14][15] until the addition of a "guest mode" feature on December 10, 2014.[16] When enabled, the feature allows sender devices to discover a nearby player by detecting ultrasonic audio emitted by the television or speaker system to which the player is connected;[17][18] alternatively, the sender device can be paired with the receiver device using a four-digit PIN code.[18][19] Guest mode is only available for Chromecasts; the Nexus Player and Android TV devices do not support the feature.[20]

SDK and compatible apps

Bluetooth audio players.[21]

Release and distribution

When the first-generation Chromecast was released, four Google Cast-compatible apps were available:

Realplayer Cloud.[28]

Google opened the SDK to all developers on February 3, 2014.[29] In its introductory documentation and video presentation, Google said the SDK worked with both Chromecast devices and other unnamed "cast receiver devices". Chromecast product manager Rish Chandra said that Google used the intervening time to improve the SDK's reliability and accommodate those developers who sought a quick and easy way to cast a photo to a television without a lot of coding. Google also made the SDK a part of the Google Play Services framework, thereby giving users access to new apps without having to update Android itself.[30][31] Over time, many more applications have been updated to support Google Cast. At Google I/O 2014, the company announced that 6,000 registered developers were working on 10,000 Google Cast–ready apps;[32] by the following year's conference, the number of compatible apps had doubled.[33] Google's official list of compatible apps and platforms is available on the Chromecast website. Google has published case studies documenting Google Cast integration by Comedy Central, Just Dance Now, Haystack News and Fitnet.[34]

Framework

The development framework has two components: a sender app and a receiver app, both of which make use of APIs provided by the SDK.

  • The sender app is based on a vendor's existing Android or iOS mobile app, or desktop web app, and provides users with content discovery and media controls, including the ability to select to which device content is streamed. Under the hood, sender apps can detect receiver devices on the same local network, establish a secure channel, and exchange messages.
  • The receiver app is a web app executing in a Chrome browser-like environment resident on the cast receiver device. Receiver apps of varying complexities can be developed depending on the variety of content formats the app can play. For example, a simple receiver app might just play
    Microsoft Smooth Streaming Protocol.[30]

Supported media

Chromecast supports the image formats

H.264 High Profile Level 4.1 (decoding up to 720p/60 frames per second (fps) or 1080p/30fps) and VP8. Supported video codecs for the third generation Chromecast are H.264 High Profile Level 4.2 (decoding up to 720p/60 (fps) or 1080p/60fps) and VP8.[35] The supported video codecs for the Chromecast Ultra are HEVC / H.265 Main and Main 10 Profiles up to level 5.1 (2160p/60fps) and VP9 Profile 0 and Profile 2 up to level 5.1 (2160p/60fps).[36]

Additional functionality and APIs

At

LG and Sony.[38]

In May 2015, Google introduced new sets of APIs to Google Cast. The Cast Remote Display APIs allow developers to create second-screen experiences for apps such as games without needing to mirror displays. The Game Manager APIs offer developers more options for creating multiplayer games.[39] Lastly, additional APIs were provided to control autoplaying and queuing of content.[40]

In September 2015, Google announced "Fast Play" and accompanying developer tools, which are aimed at reducing the delays between loading content. In a typical scenario, if a user viewed the first three episodes of a television series, the fourth episode might load in the background.[41] The feature's release has since been delayed.[42]

Compatible devices

See also

References

  1. ^ "Google Launches the $35 Chromecast Streaming Device to Bring Chrome to the Living Room". TechCrunch. Archived from the original on October 25, 2020. Retrieved October 21, 2020.
  2. ^ Protalinski, Emil (February 3, 2014). "Google Opens Up Chromecast to Developers, Releases Cast SDK". The Next Web. Retrieved October 21, 2020.
  3. ^ Roettgers, Janko (November 23, 2016). "Google Quietly Phases Out 'Google Cast' Branding for TVs, Speakers". Variety. Retrieved November 23, 2016.
  4. ^ Jonnalagadda, Harish (October 4, 2017). "Google has sold 55 million Chromecasts around the world". Android Central. Mobile Nations. Archived from the original on October 5, 2017. Retrieved October 4, 2017.
  5. ^ a b Turner, Adam (July 14, 2014). "Hands on: Chromecast Android screen mirroring". The Sydney Morning Herald.
  6. ^ Maybury, Rick (April 5, 2014). "Should I buy Google Chromecast?". The Telegraph. Telegraph Media Group. Retrieved July 3, 2014.
  7. Fast Company
    . Retrieved January 9, 2014.
  8. ^ "Get Started with Chromecast: What's under the Hood?". Chromecast Help. Google Inc. Retrieved August 7, 2014.
  9. ^ Robertson, Adi (July 24, 2013). "Google Reveals Chromecast: Video Streaming to Your TV from Any Device for $35". The Verge. Vox Media. Retrieved September 19, 2013.
  10. ^ Welch, Chris (October 1, 2015). "Google Photos for Android Now Works with Chromecast". The Verge. Vox Media. Retrieved October 8, 2015.
  11. ^ Calimlim, Aldrin (December 11, 2015). "Google Updates Photos and Wallet Apps for iOS with New Features". AppAdvice. Retrieved January 1, 2016.
  12. ^ "Cast from Chrome to your TV: Casting a Tab". support.google.com. Google Inc. Retrieved September 24, 2013.
  13. ^ "Cast from Chrome to your TV: Minimum System Requirements". support.google.com. Google Inc. Retrieved August 30, 2013.
  14. ^ Devine, Richard (June 25, 2014). "Chromecast to allow casting without being on same WiFi network". Android Central. Retrieved June 25, 2014.
  15. ^ Tarantola, Andrew (June 25, 2014). "Chromecast Is Getting a Slew of Awesome New Features". Gizmodo. Gawker Media. Retrieved June 25, 2014.
  16. ^ Kellex (December 11, 2014). "Chromecast Update Brings Guest Mode, Beta Mirroring, Fresh Material UI". Droid Life. Retrieved December 12, 2014.
  17. ^ Welch, Chris (June 26, 2014). "Google's Chromecast will use ultrasonic sounds to connect with nearby devices". The Verge. Vox Media. Retrieved June 27, 2014.
  18. ^ a b "Set up guest mode for Chromecast Audio". support.google.com. Google Inc. Retrieved December 18, 2015.
  19. GigaOM. Archived from the original
    on June 26, 2014. Retrieved June 27, 2014.
  20. ^ "Guest Mode". Google Developers. Google Inc. July 26, 2016. Retrieved November 18, 2016.
  21. ^ "Google Cast Design Checklist". Google Developers. Google Inc. Retrieved July 30, 2014.
  22. ^ "This Week in Tech 416". TWiT.tv. Retrieved July 31, 2013.
  23. ^ Pressman, Aaron (August 1, 2013). "Chromecast vs. Roku vs. Apple TV: What's the Best Streaming Device? | Daily Ticker". Yahoo! Finance. Yahoo. Retrieved August 27, 2013.
  24. ^ "Google Cast Release Notes: 1.0". Google Developers. Google Inc. July 24, 2013. Retrieved June 27, 2014.
  25. ^ Nischol, Karan. "Cast Away: Hulu Plus on Chromecast". Blog. Hulu. Archived from the original on October 4, 2013. Retrieved October 2, 2013.
  26. CBS Interactive
    . Retrieved June 27, 2014.
  27. ^ Lawler, Richer (November 21, 2013). "Google invites devs over for a Chromecast hackathon plus SDK show-and-tell, updates official app". Engadget. AOL. Retrieved June 27, 2014.
  28. ^ Roettgers, Janko (December 13, 2013). "Chromecast in 2014: an open SDK, big international plans and maybe even new devices". GigaOM. Archived from the original on June 26, 2014. Retrieved June 27, 2014.
  29. CBS Interactive
    . Retrieved June 27, 2014.
  30. ^ a b Affaki, John (February 3, 2014). "Ready to cast: Chromecast now open to developers with the Google Cast SDK". Google Developers Blog.
  31. ^ Roettgers, Janko (February 3, 2014). "Get ready for tons of new Chromecast apps: Google releases Cast SDK". Gigaom. Archived from the original on February 3, 2014. Retrieved November 17, 2016.
  32. Gannett Company
    . Retrieved June 27, 2014.
  33. ^ Haselton, Todd (May 28, 2015). "17M Chromecasts Sold to Date – 20,000 Apps Available". TechnoBuffalo. Archived from the original on May 28, 2015. Retrieved May 28, 2015.
  34. ^ "Cast: Case Studies". Google Developers. Google Inc. Retrieved April 13, 2016.
  35. ^ "Supported Media for Google Cast with 1st and 2nd gen Chromecast". Google Developers. Google Inc. March 20, 2017.
  36. ^ "Supported Media for Google Cast with Chromecast Ultra". Google Developers. March 20, 2017.
  37. ^ Singleton, Micah (January 5, 2015). "Google takes on AirPlay with Google Cast for audio". The Verge. Vox Media. Retrieved January 11, 2015.
  38. ^ "Google Cast for audio". Google Cast. Retrieved February 4, 2016.
  39. ^ Tim-o-tato (May 29, 2015). "Google Launches 'Cast Remote Display' APIs, 'Game Manager' APIs". Droid Life. Retrieved November 18, 2016.
  40. ^ Ruddock, David (May 29, 2015). "Google Cast Gets New APIs, Allowing For Second-Screen Functionality, Autoplay, Queuing, And More". Android Police. Retrieved November 18, 2016.
  41. ^ Olanoff, Drew (September 29, 2015). "Google Announces Chromecast 2 And Chromecast Audio To Bring Intelligence To Your Living Room". TechCrunch. AOL. Retrieved September 30, 2015.
  42. ^ Ruddock, David (July 27, 2016). "Chromecast's Fast Play Content Prediction feature has been delayed, still being worked on". Android Police. Retrieved November 21, 2016.
  43. ^ "Chromecast built-in - Audio". Retrieved July 27, 2017.

External links

Retrieved from "https://en.wikipedia.org/w/index.php?title=Google_Cast&oldid=1232055073"