It’s all explained in a new video shared by Facebook co-founder and CEO Mark Zuckerberg Thursday.
The videos are created using a technology called cube-mapping, in which the video is projected onto faces of a cube, with each face representing one direction relative to the viewer. This enables the viewer to see the video from all angles, while removing some redundant information that causes video warping, reducing the file size by 25% — a big deal on Facebook’s scale.
The video also explains how this works for high-definition VR-watching. Here, the 360-degree video is projected onto the faces of a pyramid. As the viewer changes his or her point of view, viewpoints are dynamically switched, with the one in focus always showing the optimal resolution. This technique drastically reduces file size, while keeping the quality of the video high.
I found this interesting. It’s a basic technical description of how we stitch together virtual reality and 360 videos efficiently enough to stream live on your phone.Video is growing quickly on Facebook. In the last year, people went from watching 1 billion video views each day to now more than 8 billion. We’re constantly focused on ways to improve this experience and add new experiences like virtual reality and 360 videos.Virtual reality and 360 videos create lots of new challenges. We need to stitch together views from multiple cameras into a single continuous view that you can look around in wherever you want. Then, we need to find a way to make it efficient enough to stream every perspective the person might want to see simultaneously over a normal mobile connection.If you’re interested in how we solve these problems, check out this video using an example of Blue Angels footage taken by USA Today.
Posted by Mark Zuckerberg on Thursday, January 21, 2016
In his post, Zuckerberg also shares a mind-blowing statistic about video on Facebook. Facebook users watch more than 8 billion videos on the network every day — up from 1 billion in 2015.
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