Crystal vs 8KX - Which one is the best for watching videos?

doublevr

metichemsi there are options to get 12K playback with viewport streaming, etc. Also higher screen resolution is still beneficial

fenderwq

doublevr Any plans on incorporating this in DeoVR?

rerun119

fenderwq Is the 12k battery only? I hope that is not true

justsomedude101

fenderwq rerun119

At least once upon a time it was supposed to be tethered with the option to run at a lower resolution/FOV while untethered (i.e. on battery). News is sparse though these days.

fenderwq

rerun119 Very likely, the crystal is. Heard the CEO of Pimax say it in an interview on MRTV. The explanation Sebastian got from Pimax is that in order to use a qualcomm chip the battery is a requirement. Bullshit argument if you ask me. But yeah, the battery of the crystal will drain during tethered usage and since the 12K is based on the same "architecture" I wouldn't hold my breath for that to chance but who knows, you never know.

fenderwq

justsomedude101 It's still on the roadmap. The question is more about when 🙂

Rakly3

fenderwq Once Renderheads implements it, it's a go!

fenderwq

Rakly3 Oww, wow, really cool. I've talked about it so much on this forum that I kind of lost hope that it would be possible. What kind of resolution limit are we talking about btw?

Rakly3

fenderwq I want to make clear that we are talking about viewport here, as @doublevr mentioned.

The video resolution would be 12k.
A couple years ago we used this technique to offer 5K on the Oculus Go and it worked perfectly fine.

The prediction model would also use something like this (just an illustration) and update low res to full res as you look around. Which quality it uses where, depends on where you will most likely look next.

fenderwq

Rakly3 Ahh, yeah, I read about that. Thanks for the explanation. Seems like a valid solution. Something like a Pimax will have a lot of a 180 video in frame though. Anyways, cool that there is room for improvement.

metichemsi

Rakly3 super interesting, I am completely new to this viewport tech, this is the first I hear of this. Quick question, would this take into account the FOV of the headset we are using? Meaning, if I am using a pimax headset with either a 200 or 150 FOV will those zone sizes take that into account or are those zone sizes irrelevant to the headset POV?

Rakly3

fenderwq
metichemsi

It's the app, ie DeoVR, requesting the tiles it needs. So I don't think the headset FOV would pose an issue. If there are situations where the data would exceed "8K in processing power", it would then switch a resolution one step lower. - I know that sounds bad, but it's either no video, or a bit lower resolution. It would still be at minimum 8K quality. But could also be 10k. - This is not something we can change if this would happen, it's bound to the hardware capabilities and requirements.

A lot of the quality also still lies with the headset's display (and lens). The same 8K video on Quest Pro looks noticeable better than on Quest 2.

justsomedude101

Even if the 12k just improves on the peripheral distortion/sweet spot of the 8kx and has better over-ear audio, it could do nothing else new and I would still be totally on board personally. I've probably said this 50x in the forum over the years, but the ultra-wide FOV truly is game changing.

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