Fb explains the tech behind its 360-diploma movies

Facebook explains the tech behind its 360-degree videos

Fb made 360-levels movies viewable on the Information Feed again in September, nevertheless it was apparently no straightforward feat making it potential. The newest submit on its Engineering weblog explains the issues they needed to cope with, together with the problem of sewing footage collectively with out producing distorted pictures. To stop making movies seem like they got here out of a warped nightmare, the engineers created a video filter that makes use of a standard CG technique referred to as “dice mapping.” It really works by dividing a body into six squares to type a dice: the highest and backside 25 % of the body are compressed into two photographs, whereas the center half that makes up 50 % of the body is split into 4.

Now, that six-picture body continues to be flat. So, what the filter does is wrap it round a digital sphere inside a dice, with every sq. increasing to fill the dice in each course you possibly can view: up, down, left, proper, back and front. That permits Fb to render every body with 25 % fewer pixels than the unique video, making the completed product simpler to view from our finish. Fewer pixels additionally imply quicker processing occasions and smaller file sizes, that are important for the social community to have the ability to produce 360-diploma movies shortly. In reality, its engineers determined to separate the job throughout a number of highly effective machines, which the corporate can undoubtedly afford, for quicker encoding.

Whereas these 360-diploma movies are completely viewable with out VR glasses, they point out the arrival of extra content material on the web site optimized for digital actuality. Mark Zuckerberg revealed earlier this yr that the corporate’s specializing in VR tech, as he believes it is the “subsequent main computing and communication platform.” To not point out, FB dropped $2 billion final yr to purchase Oculus VR. Little question he’d need the Information Feed to be extra immersive, particularly because the shopper model of Oculus Rift shall be out there for buy in Q1 2016.

As for what’s subsequent for the workforce, Fb engineers Evgeny Kuzyakov and David Pio had this to say:

In fact, hurdles stay. We’ve not cracked automated detection of 360 video add but — proper now the false-constructive price inhibits our capacity to completely implement this. Fb’s scale is so giant that even a zero.1 % false-constructive price would imply we might incorrectly declare hundreds of normal movies as 360 video. That is a selected instance, however there are much more broad, thrilling challenges to deal with as properly. Greater resolutions, 3D video, and 360 video optimized for digital actuality are all a part of the close to way forward for this area. It is an thrilling time to be engaged on video. We hope you benefit from the expertise we constructed immediately and sit up for launching extra sooner or later.

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