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P2PTV overlay network serving three video streams.

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P2PTV refers to peer-to-peer (P2P) software applications designed to redistribute video streams in real time on a P2P network; the distributed video streams are typically TV channels from all over the world but may also come from other sources. The draw to these applications is significant because they have the potential to make any TV channel globally available by any individual feeding the stream into the network where each peer joining to watch the video is a relay to other peer viewers, allowing a scalable distribution among a large audience with no incremental cost for the source.

Technology and use[edit]

In a P2PTV system, each user, while downloading a video stream, is simultaneously also uploading that stream to other users, thus contributing to the overall available bandwidth. The arriving streams are typically a few minutes time-delayed compared to the original sources. The video quality of the channels usually depends on how many users are watching; the video quality is better if there are more users.The architecture of many P2PTV networks can be thought of as real-time versions of BitTorrent: if a user wishes to view a certain channel, the P2PTV software contacts a 'tracker server' for that channel in order to obtain addresses of peers who distribute that channel; it then contacts these peers to receive the feed. The tracker records the user's address, so that it can be given to other users who wish to view the same channel.In effect, this creates an overlay network on top of the regular internet for the distribution of real-time video content.

分类专栏： Android开发之路文章标签： android tv 最后发布:2020-09-04 10:24:11 首次发布:2020-09-04 10:24:11 版权声明：本文为博主原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接和本声明。. P2PTV refers to peer-to-peer (P2P) software applications designed to redistribute video streams in real time on a P2P network; the distributed video streams are typically TV channels from all over the world but may also come from other sources. Rakuten TV is a video-on-demand (VOD) streaming service, offering movies and TV series for subscription, rental and purchase. Rakuten TV's catalogue includes content from studios around the world including Warner Bros., Disney and Sony Pictures, local distributors, and independent labels, being the smallest and least known service among its competitors.

The need for a tracker can also be eliminated by the use of distributed hash table technology.

Some applications allow users to broadcast their own streams, whether self-produced, obtained from a video file, or through a TV tuner card or video capture card. Many of the commercial P2PTV applications were developed in China (TVUPlayer, PPLive, QQLive, PPStream). The majority of available applications broadcast mainly Asian TV stations, with the exception of TVUPlayer, which carries a number of North American stations including CBS, Spike TV, and Fox News. Some applications distribute TV channels without a legal license to do so; this utilization of P2P technology is particularly popular to view channels that are either not available locally, or only available by paid subscription, as is the case for some sports channels.^[1] Distributing links to pirated P2PTV feeds on a U.S.-based Web site can result in the U.S. government seizing the Web site, as it did with several P2PTV aggregation sites prior to Super Bowl XLV.^[2] By January 2009, there were about 14,000 P2P channels on PPStream.

Other commercial P2PTV applications outside China are Abroadcasting (USA), Zattoo (Switzerland/USA), Octoshape (Denmark), LiveStation (UK).

Issues for broadcasters[edit]

Broadcasting via a P2PTV system is usually much cheaper than the alternatives and can be done by private individuals.
No quality of service (QoS). Compared to unicasting (the standard server-client architecture used in streaming media) no one can guarantee a reliable stream, since every user is a rebroadcaster. Each viewer is a part of a chain of viewers who can all have a negative influence on the reliability of the stream (by having a slow PC, a filled downlink or uplink or an unreliable consumer grade DSL or cable connection).
Less control. If a broadcaster prefers to limit access to their content based on regions, and would like good data on viewer behaviour, such as volume, trends and viewing time, then a traditional broadcasting solution offers more control.
Professional broadcasters and distributors have used a hybrid solution for many years. Distribution servers are not centrally installed, but are rolled out in a smart, decentralized way. A central management facility manages content distribution over multiple peer servers (also known as edge servers, or caches), strategically located near user swarms (generally popular access ISP networks), manages load balancing, redirection of users, view reporting and QoS. An example is Akamai.

Notable applications[edit]

Compared[edit]

App	Fully Distributed	Public	Private	FOSS	First Release	Windows	Linux	Mac	Android	iOS	Comments
Ace Stream	?	Yes	No	No	2012	Yes	Yes	via Wine	?	No	home
QQLive	No	?	?	No	?	Yes	No	No	?	?	source
peerstreamer	?	Yes	No	No	?	play only (2013/12/11)	Yes (2013/12/11)	play only (2013/12/11)	?	?
Tribler	Yes	Yes	?	Yes; LGPL	2007	Yes	Yes	Yes	Yes ^[3]	No

Branded webtv service for end-users[edit]

Afreeca – based in South Korea
Funshion – based in China mainland
Hypp.TV (live and non-live) – based in Malaysia
Miro (non-live)
PPLive – based in China mainland, Chinese only program.
PPStream – based in China mainland
QQLive – based in China mainland
Zattoo.com (Windows, Linux, Mac)

Commercial solutions for broadcasters[edit]

Alluvium – based in Texas, USA
CDNetworks (CDN service)

Free P2P TV software for end users and amateur broadcasters[edit]

Ace Stream - P2PTV software solution based in Russia and derived from BitTorrent

Unclassified (yet)[edit]

Pulse – (Windows, Linux) LGPL P2PTV engine with announcement portal and unrestricted access

Discontinued services[edit]

Babelgum.com (non-live, used peer-to-peer technology until March 2009)
BBC iPlayer (live and non-live, used peer-to-peer technology until December 2008)
CoolStreaming (discontinued service)
Joost.com (non-live, live trials)
LiveStation.com (Windows, Linux, Mac) – based in United Kingdom
Sopcast^[4]
Streamtorrent^[5]
Tribler – linked to P2P-Next, relies on BitTorrent protocol
TVUnetworks – P2PTV software (Windows and Mac OS X) and network (Discontinued, Service is shut down)

References[edit]

^Geoffrey A. Fowler; Sarah McBride (2 September 2005). 'Newest Export From China: Pirated Pay TV'. The Wall Street Journal. Archived from the original on March 10, 2016.Alt URL
^Martinez, Jennifer (2011-02-02). Feds seize sports websites before Super Bowl. The Politico. Retrieved 2011-02-02.
^'GitHub - Tribler/tribler-android'. 28 February 2019 – via GitHub.
^'Archived copy'. Archived from the original on 2009-07-18. Retrieved 2019-04-14.CS1 maint: archived copy as title (link)
^https://streamtorrentblog.wordpress.com/

Retrieved from 'https://en.wikipedia.org/w/index.php?title=P2PTV&oldid=997410763'

Rakuten TV
Type	Subsidiary
Industry	Electronic commerce
Founded	2010
Founder	Jacinto Roca
Headquarters	, Spain
Worldwide
Key people	Jacinto Roca (CEO) Josep Mitjà (COO) Nikhil Deora (CSO) Miquel Barba (CTO)
Products	Video on demand films and tv series
200
Parent	Rakuten
Website	Rakuten TV Rakuten Sports

Rakuten TV is a video-on-demand (VOD) streaming service, offering movies and TV series for subscription, rental and purchase. Rakuten TV's catalogue includes content from studios around the world including Warner Bros., Disney and Sony Pictures, local distributors, and independent labels, being the smallest and least known service among its competitors.

Rakuten TV's content can be streamed to most devices, offering a similar service to Netflix and other streaming services.^[1]^[2]^[3]^[4]

The company is headquartered in Barcelona and currently operates in twelve countries around Europe; Spain, UK, France, Germany, Italy, Finland, Austria, Ireland, Belgium, Netherlands, Luxembourg, Portugal and Switzerland.

History[edit]

In June 2012, Rakuten, the world's third largest e-commerce company, acquired the company previously known as Wuaki.tv.^[5] In July 2017, Wuaki.tv changed its name to Rakuten TV. Rakuten took over the user base from TalkTalk TV Store (previously Blinkbox) including migration of user purchased titles, in June 2018.

Rakuten Sports[edit]

On 11 June 2019, Rakuten announced the launch of Rakuten Sports, a new live streaming and video on demand (VOD) sports entertainment platform to expand and deliver sports content to several countries around the world, after eleven countries across the Europe. Starts 14 June, sports fans around the world will able to watch J.League football matches.^{[note 1]}

In November 2019, Rakuten Sports provides the subscription streaming coverage of Davis Cup for two seasons 2019 and 2020, also as the part of main sponsorship, starting from the 2019 finals.^[6]

Notes[edit]