If you tick enable legacy AVC decoding you tell Vegas not to use your GPU.

Hello JV I use Sony Vegas version 18 Build 482

That version does not exist and that buildnumber is not the best and latest

Does the NVIDIA decoder do 8K HEVC? If not it will all be on the CPU and everything else will have to wait for the decoding.

@peter-d5816 Make sure you uncheck the box for legacy-hevc decoding. Not sure if Nvidia will decode 8k 420 hevc but that setting will at least give it a shot.

Btw, I've found 8k on the s23 disappointing. It's limited to 30p and 24p and only one lens option... 4k goes up to 60p which looks better, decodes easier, and gives the option to choose any of the 4 lenses. And if you can get by with 4k 30p, there's double the low-light capability and sharper focus compared to 8k 30p.

I tried to render 17min 4k video with

PC after 20min 2% done remaining 9hours

Samsung S23Ultra with CapCut after 15mins finished 4k video 10GB size

Capcut will automatically use hardware encoding, with Vegas you need to select a MagixAVC/HEVC Nvenc option, Nvenc being the Nvidia hardware encoder

(8K source 8K output)

(8K source 4K output)

Glad you found the problem..... deleting "Sony" Vegas ....

Does the NVIDIA decoder do 8K HEVC? If not it will all be on the CPU and everything else will have to wait for the decoding.

Apparently Nvidia does decode 8k hevc. Just not particularly well on my Xeon using a 1660 for decoding. Here I was trying to play an 8k 30p Fuji clip with no proxy and getting 0.626 fps compared to about 6 fps on the Arc machine:

@Howard-Vigorita It's Vegas's implementation nothing wrong with your Nvidia GPU or it's decode. Interesting to see the Arc decoder working better on Vegas though.

(8K30 project)

You can see by the decode graphs what it should look like when working correctly in Resolve, in comparison with those jagged lines in Vegas which happen when Vegas can't process all the frames and drops them instead

I just tried it in Resolve... will post details in the other thread. Also tried playing the 8k clip in the default Windows Media Player... next to no gpu utilization and very little cpu either... but looks spectacular full screen.

@Howard-Vigorita in Resolve the 8K timeline used10GB Vram, getting up to 12GB when playing, so potentially you'll have problems due to your cards 6GB Vram but it would be unrelated to the Nvidia Decoder, more to do with swapping memory between Vram and system memory.

Does the NVIDIA decoder do 8K HEVC? If not it will all be on the CPU and everything else will have to wait for the decoding.

Apparently Nvidia does decode 8k hevc. Just not particularly well on my Xeon using a 1660 for decoding. Here I was trying to play an 8k 30p Fuji clip with no proxy and getting 0.626 fps compared to about 6 fps on the Arc machine:

Nice

@Howard-Vigorita in Resolve the 8K timeline used10GB Vram, getting up to 12GB when playing, so potentially you'll have problems due to your cards 6GB Vram but it would be unrelated to the Nvidia Decoder, more to do with swapping memory between Vram and system memory.

Resolve other problem offline media :(

@peter-d5816 the free Resolve is a 4K editor, limited to 4096x4096 (I think) I"m using the paid Resolve and I assume Howard is too. One of Resolve's more common bugs is 'offline media' though so hard to know if you're running into a free Resolve restriction. It would make sense and not be a bug if free Resolve simply won't decode 8K.

Hello guys I installed yesterday Sony Vegas Pro 21 trial version .First problem my videos after import looks grey

Solution I changed in Project Properties / Pixel format: from 32-bit floating to 8bit (full range) and everything looks

great now

Second problem I'm looking for correct setup for 8k video render .

This is my setup for GPU

Preferences / Video / GPU acceleration of video processing: Optimal - NVIDIA GeForce

And File I/0

8K render setup

CPU 100% GPU 3%

2.option

Hello guys I installed yesterday Sony Vegas Pro 21 trial version .First problem my videos after import looks grey

The original post was deleted so where's the info about the system and the media?

Turn view transform to off in 32-bit full, or right-click on media go to properties, media and select a matching profile.

If it's 10-bit footage (esp. log) you'd want to export in a 32-bit mode to benefit from its added precision. That will slow down everything so you can edit in 8-bit mode.

Dynamic ram preview is set too high, past the point of having it benefit you. Try the default of 5% or just a GB or two.

What is the media exactly? https://www.vegascreativesoftware.info/us/forum/faq-how-to-post-mediainfo-and-vegas-pro-file-properties--104561/

For preferences/ file io, change it to Intel QSV.

For your render setting if there is only Mainconcept then it won't use the GPU to encode. You need QSV or NVENC for GPU encoding.

Raw processor is for raw footage. Are you using a format like Blackmagic Raw? If not this is irrelevant and you can see it made no improvement.

Latest setup