@j-v you have a 1660ti in your desktop, the same card as him but choose to screen record playback of your laptop with an rtx2070 possibly using an Intel IGPU decoder, a video of your 1660ti working is what' relevant here, but you'd have to set decode to the Nvidia card

@relaxvideo just to confirm, task manager/performance/gpu shows no decode activity for 8k, is that the same for experiment hevc decoder?

Nvidia's 8k decoding support isn't clear to me. 8k is only specifically mentioned in Nvidia Pure Video versions 8 and 11. Which correspond to feature sets H & K. And feature set I says it supports all of H with greater efficiency. The 1660 & 2000-series is PV10/J which falls in between but doesn't mention 8k or that it includes all of feature set H or I. Wonder if any 2080 users ever see Nvidia 8k hardware decoding?

@relaxvideoDoes Vegas play this file with GPU decoder?

https://www.mediafire.com/file/ia365n7556capk7/P1025412.MOV/file

Above 4k below 8K, you may already have some gopro 5.*K HEVC footage.

I could test in a week with the 2080 if you still care by then.

j-v: yeah, that's fine.

UltraVista: yes, checked in task manager, no decode activity for 8k. I just tested with experiment hevc decoder, and it does use nvdec, but the playback is still unusable, only 2-3fps, compared to fluid mpc-hc.

Yes, gopro file is fine, and also my Insta360 X4 8k hevc export is also fine!! (7680x3840)

Howard-Vigorita: Nvidia's 8k decoding support is clear to me. Have you checked "Supported Format Details (Click to learn more)" button on the link what i provided? This clearly states that with Turing chip 8k (max 8k x 8k) hevc 4:2:0 even at 12 bit is supported. Only AV1 decoding is missing (besides 4:2:2 avc, hevc..)

So 8k hevc from Insta camera use nvdec in Vegas, but the sample 8k hevc from djrikki2 does not use!

@Former user 

@relaxvideoDoes Vegas play this file with GPU decoder?

https://www.mediafire.com/file/ia365n7556capk7/P1025412.MOV/file

Above 4k below 8K, you may already have some gopro 5.*K HEVC footage.

this plays fine in Vegas, NVIDEA decode is around 30% load via a RTX 3090

thanks

i tried with latest nvidia Studiodriver 560.81, no luck either.

@relaxvideo There's an interesting video on YouTube that compares 8k 1660 vrs 3070 performance using Edius from Grass Valley. He only tested Nvenc encoding for both, but said he chose the codec to force decoding by CPU.

www.youtube.com/watch?v=YuV0ujgR5Qo&t=156s

I can see source named 8k 60p on his timeline which I assume is hevc. Suggesting his results would have been quite different if he had allowed both to attempt gpu decoding.

In another thread user djrikki2 shared a 8k hevc mov file,
which plays fine in MPC-HC mediaplayer with nvdec decoding,
but in Vegas 22 it does NOT use nvdec, and my cpu can decode only at 0.3 fps :)

I can't address the reports of decoding issues in the newest Vegas, since I haven't tried it.

However, the temptation to compare "preview" performance in Vegas, a nonlinear editor, with "playback" in a desktop media player such as you named, should be avoided.

Vegas must decode the compressed video stream to native uncompressed bits for processing, store them in RAM and VM, and "try" to access them fast enough for previewing, filter and plugin processing, editing, and eventual encoding back to a compressed format for delivery.

On the other hand, the video players you named all read and process directly from the compressed stream without the need to decode to raw bits on the fly, fudging through stream errors and glitched frames, with a surprising degree of success.

That is why Vegas spends time opening and decoding your video file, while players start playing when you press Play. I know of no recent changes in that fundamental behavior.

Those are two completely different scenarios, that absolutely defy comparison on any level, except in the most superficial observation.

In another thread user djrikki2 shared a 8k hevc mov file,
which plays fine in MPC-HC mediaplayer with nvdec decoding,
but in Vegas 22 it does NOT use nvdec, and my cpu can decode only at 0.3 fps :)

I can't address the reports of decoding issues in the newest Vegas, since I haven't tried it.

However, the temptation to compare "preview" performance in Vegas, a nonlinear editor, with "playback" in a desktop media player such as you named, should be avoided.

Vegas must decode the compressed video stream to native uncompressed bits for processing, store them in RAM and VM, and "try" to access them fast enough for previewing, filter and plugin processing, editing, and eventual encoding back to a compressed format for delivery.

On the other hand, the video players you named all read and process directly from the compressed stream without the need to decode to raw bits on the fly, fudging through stream errors and glitched frames, with a surprising degree of success.

That is why Vegas spends time opening and decoding your video file, while players start playing when you press Play. I know of no recent changes in that fundamental behavior.

Those are two completely different scenarios, that absolutely defy comparison on any level, except in the most superficial observation.

Indeed, can you edit a video in your player like you do with Vegas? Why not blaming the player for that?

There are also some minimal requirements for your hardware to EDIT video with is different for HD, 4k or 8k.

Yes, i know that and understand.

What i dont, is why my Insta360 8k export play fine in Vegas?...

@relaxvideo

similar to j-v, I also achieve the full playback speed on my laptop. So with 768ßx4320 8bit project settings with preview full the 25 fps.

My RTX 3070Ti is utilized up to 71%, geh CPU to 13% only - and RAM with 15 GB.

I do not know what the difference is, on your system.

thx, so i have to buy a laptop, lol :)

Lol:)

Was it again on your #2? Does the 1660Ti have 6GB ram? And the i7 2600 has 4 cores I think. Maybe it is hard for this hardware to handle 8K footage? I do not know really.

yes, on #2

yes, 6GB ram

i7 8 logical core

Maybe hard, but insta version not. Ok, that's "just" 7680x3840

Just tried with vp21 b315 & 208 on my laptop and plays great with mucho decoding on the 3060. Nvidia 3060's for a desktop are running about $300us on Amazon.

thx, so i have to buy a laptop, lol :)

Wouldn't think so it looks like a bug with 1660ti GPU decoding, experimental decoder works, video players work, you could check if free capcut uses your decoder, also could try re-wrapping to mkv, I found with VP21b315 I could force GPU decoding with Sony files when It wouldn't work otherwise with new decoder.

Your 1660ti probably wouldn't GPU decode in Resolve, but that's not a bug, they blacklist GPU decoding based on how much Vram the card, for example Resolve won't decode 5.3K with a 4GB Vram card. This isn't true for Vegas as Howard has already proved, his 6GBVram card will GPU decode the 8K file in Vegas.

@j-v could tell us if his 1660ti decodes the 8K file but he's gone into hiding.

I just fired up my old xeon which has a 1660 in it and it does in fact decode with vp21 build 315. Surprised me. Managed to play smoothly up to Best-auto. GPU usage is unusually high but it's not even a ti and has only 1 fan. Studio Driver is 555.85, not too out of date. Here's a screen shot with settings which are nothing special other than thumbs and proxies are off:

Haven't got vp22 on that machine yet but I'll check it out soon as I juggle the serial number.

UPDATE: even better with vp22 b93... I was able to play with Best-Full

Also tried experimental-hevc... plays very poorly. Reducing preview to draft-auto plays about the same.

hmm. then whats wrong by me?..
Sorry, because of my stereo 3d working, i dont want to upgrade this machine to 3060 or newer. (no nvidia stereo driver here)

I would save this older machine for the s3D work. And - if possible - invest in a new machine for the rest.

That's my daughter's pc :)

the question remained : why insta 8k hevc plays fine, while djrikki2's mov not?