What is adaptivebitrate streamingand how does itwork?
Consumers want to watch online video And they want videos to be streamedanywhere, anytime on any device. without interruption in the highest resolution possible. That’s easier said than done!
Video looks great when streamed at the highest resolution but....
.... when bandwidth conditions worsen, like when going from wi-ﬁ to 3G,the demands of high resolution video can overload a viewer’s connection. This results in buffering and other delays that negatively affect a consumer’s quality of experience (QoE)
To address this problem, content delivery networks (CDNs) andvideo providers are turning to Adaptive Bitrate (ABR) Streaming.
Adaptive Bitrate Streaming detects a users available bandwidth in realtime and calibrates the video stream accordingly to always deliver thebest possible picture quality. ABR dynamically shifts bandwidth to higher and lower levels based on availability
While the concept is generally the same, there are severaldifferent ﬂavors of Adaptive Bitrate Streaming technology.HTTP Dynamic Streaming Smooth Streaming HTTP Live Streaming
For ABR to work, a video is ﬁrst encoded at The video player then pulls fragmentsdifferent bitrates to accommodate varying from the different encodings and insertsbandwidth connections. them into the stream as bandwidth dictates.Each bitrate version is sliced up into!tinyfragments — typically 2 to 10 seconds.
This results in faster video start times and a continuous, uninterrupted video experience.... ...which makes for happier viewers and content providers However, it also results in amajor measurement challenge
Not long ago, an entire movie couldbe measured as a single ﬁle.
Now, with ABR, measuring that samemovie in aggregate over a large viewingaudience can require analyzing tens ofthousands of separate ﬁles.
Then consider the sheer volume of ABR ﬁlescoursing over a network with 150 channels
The number of fragment ﬁles over this network could be in the tens of millions for a single bitrate. Add several more bitrates into the equation and the number ofAdaptive Bitrate Streaming ﬁles could jump into the hundreds of millions!
This level of fragmentation turns themeasurement data into a lot of unusable noise.Skytide Insight for Content DeliveryNetworks separates the signalfrom the noise by identifying,re-aggregating and reportingon the actual contentassets. Skytide Insight for CDNs can handle the volume and complexity that adaptive bitrate streaming demands and transform it into meaningful reports in minutes.
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