I tried turning off GPU acceleration in Video Preferences. VP 22 is still very slow on starting the program. But it can play the Canon 4k 10bit 422 files in Preview auto mode smoothly on the timeline with GPU acceleration OFF. I had to create video proxies for smooth play back on the timeline in Preview mode with the old Nvidia 3070Ti. However, VP22 is very slow at rendering to either 4k or HD GPU acceleration OFF. Also, with GPU acceleration turned on I can play 4k 8bit 420 mp4 files smoothly on the time line. I just have to avoid using the 4k 10 bit 422 files with GPU acceleration turned on. I may wait and see if Magix Support tells me VP22 does not yet support Nvidia 10-bit 422 decoding.

With GPU acceleration on do you get a different outcome with this file https://www.swisstransfer.com/d/7c32eef0-af66-4fd9-9024-bd52a5022802

Either is plays with CPU, plays with GPU, or the same black screen?

When you say GPU acceleration off do you mean in preferences/video or preferences/file io and hardware decoder off?

Preferences / video / GPU acceleration of video processing / Off

First, did you do the driver reinstall or reset? Overall video processing shouldn't affect decoding.
Second, did the benchmark project play back and render? It's a known good project (so media is not a factor).
Third, what happens if you leave preferences/video on but turn off hardware decoding in preferences/ file io?
Fourth, what happens with a non-422 file like what Alan shared.

This file file https://www.swisstransfer.com/d/7c32eef0-af66-4fd9-9024-bd52a5022802 is black in the preview window with GPU processing on or Off.

Okay so you need to try step 1 then, driver. After you do the clean-up the current one is here: https://www.nvidia.com/en-us/drivers/details/247854/

Actually Alan's file is 10-bit 422 AVC and looks like it was modified and isn't directly from a camera.
I loaded that file into 22.250 with my RTX 4060 mobile and it doesn't preview and slows VEGAS to a crawl.

General
Complete name                  : DJI_20250510135655_0200_D_TRUNC.MP4
Format                         : MPEG-4
Format profile                 : Base Media
Codec ID                       : isom (isom/iso2/avc1/mp41)
File size                      : 467 MiB
Duration                       : 5 s 271 ms
Overall bit rate mode          : Variable
Overall bit rate               : 744 Mb/s
Frame rate                     : 29.970 FPS
Encoded date                   : 2025-06-20 00:52:27 UTC
Tagged date                    : 2025-06-20 00:52:27 UTC
Writing application            : Lavf62.0.102

Video
ID                             : 1
Format                         : AVC
Format/Info                    : Advanced Video Codec
Format profile                 : High 4:2:2 Intra@L5.2
Format settings                : CABAC / 1 Ref Frames
Format settings, CABAC         : Yes
Format settings, Reference fra : 1 frame
Format settings, GOP           : N=1
Codec ID                       : avc1
Codec ID/Info                  : Advanced Video Coding
Duration                       : 5 s 271 ms
Bit rate mode                  : Variable
Bit rate                       : 744 Mb/s
Width                          : 3 384 pixels
Height                         : 6 016 pixels
Display aspect ratio           : 0.562
Rotation                       : 90°
Frame rate mode                : Constant
Frame rate                     : 29.970 (30000/1001) FPS
Color space                    : YUV
Chroma subsampling             : 4:2:2
Bit depth                      : 10 bits
Scan type                      : Progressive
Bits/(Pixel*Frame)             : 1.219
Stream size                    : 467 MiB (100%)
Encoded date                   : 2025-06-20 00:52:27 UTC
Tagged date                    : 2025-06-20 00:52:27 UTC
Color range                    : Limited
Color primaries                : BT.709
Transfer characteristics       : BT.709
Matrix coefficients            : BT.709
Codec configuration box        : avcC

I see no evidence NVIDIA 10-bit 422 decoding has been implemented in VEGAS so would expect it to fall back to a software CPU decoder for such footage. Here it's Mainconcept AVC.

https://www.vegascreativesoftware.info/us/forum/vegas-pro-vegas-post-release-history--104998/?page=3

I can't play it either wondered if 5080 could. Full file can be downloaded here (3.3GB) https://billykyle.wetransfer.com/downloads/45085a17b0b28591be27fe7757d6bb9820250513212358/a5309d

I can't play it either wondered if 5080 could. Full file can be downloaded here (3.3GB) https://billykyle.wetransfer.com/downloads/45085a17b0b28591be27fe7757d6bb9820250513212358/a5309d

Just downloaded one of the mp4's and that played smoothly in preview best full at my PC (specs in my signature).

regarding 4:2:2 10bit :

https://help.magix-hub.com/video/vegas/22/en/content/topics/13-appendix/codecoverview.htm?tocpath=Anhang%7C_____2

(Video codec overview in the VEGAS Pro 22 online help)

@vegas-edit-user Thanks for that codec comparison table- very helpful!

I downloaded the 3.3GB MP4 DJI_20250510135655_0200_D_TRUNC.MP4 and tried it with 21.208 on my laptop (RTX 4060, 13th gen i9 mobile). It plays back poorly at best full as expected but VEGAS doesn't pause or have particular issues with it. At preview/full it's editable. I'd probably use a proxy.

With 22.250 VEGAS chokes on it and takes a while to import it ("VEGAS is working").

Now 3 minutes later the screen is greyed out. VEGAS is unstable basically unresponsive.

I'd say it's not editable in VEGAS with this setup. Switching to legacy AVC decoding under preferences/ file io in 22 it is responsive though really needs a proxy file so that's what I'd have to do for this type of footage.

Hi, just for the record or for the sake of sharing.

DJI_20250510135655_0200_D_TRUNC in VP22 (248) with Legacy AVC Off it shows as a blank event.

With Legacy AVC ticked it's perfectly playable & editable, however that is at Preview (Half), at Preview (Full) it stutters, it also stutters at Good (Half).. (Proxies are turned off, I don't need them as I'm normally working with Mp4 UHD HEVC)

----------

PS. turning Proxies on with Legacy AVC Off & reimporting made no difference, it still imported as a blank event.

Hello @RogerS,

by the way, a question about the nvidia cleanup tool linked above: Isn't it perhaps outdated, or is it still maintained? (I couldn't find any real information about it).

@vegas-edit-user When I was troubleshooting NVIDIA drivers and VEGAS a year or two ago their support had me use that tool as a first step to wipe all NVIDIA software.

You can also use DDU uninstall but I thought people would feel more confidence in using a tool by the GPU maker.

All the tests I did previously were with file i/o hardware decoding turned Off. I tried turning file i/o set to Nvidia 5080 and with GPU acceleration of video set to Nvidia 5080 and to Off in each case VP22 was unresponsive and unusable for 4k 10bit 422 mp4 video. I updated the Nvidia studio driver but it did not help. I have a support request sent to Magix and will wait to see what they say. In the meantime the Nvidia 5080 seems to work well with Resolve 20 so I may be forced to finally learn how to use it.

What about with file io set to NVDEC and GPU acceleration on but legacy AVC or experimental HEVC checked in preferences/ file io to use the older decoder? (Which box depends on which type of media you are using)

VEGAS has not yet implemented support for NVIDIA 422 decoding so I'd expect no improvement over the 30XX at present but shouldn't be worse.

Legacy AVC slowed VP22. Experimental HEVC had slow rendering 4 fps. It seems the best setting was gpu acceleration off, file i/o all off. Even then I get slower rendering 17fps with Nvidia 5080 vs 50-70 fps with Nvidia 3080Ti which also gave better program inteface performance.

Is the media AVC or HEVC? I don't understand what you are comparing- if it's HEVC media legacy AVC will do nothing.

Can you share a sample media for testing with VEGAS with different GPUs (or at least explain exactly what media you are using- what settings on what camera?) You can share media with Google Drive, Dropbox, etc.

https://mega.nz/file/YJlBxDYS#S07hvCKxqOXkA7Uf73b8aD6rfZUyXTvyBhPKyEo_ULI Canon R5 H.265 4:2:2 10-Bit mp4 video file that you can download. I was just trying every possible combination of settings in Vegas Pro 22. It seems that VP 22 has problems with the Nvidia RTX 5080 gpu that it didn't have when I had the 3070Ti plugged into the mother board.

Thanks for this file and detail of what it's from (HEVC from a Canon); it is helpful. I have two NVIDIA systems myself and was looking at getting a 5070 next.

Do let us know what support says.