Trouble playing UHD video in preview

ChasMc wrote on 7/13/2025, 7:17 PM

Recorded a couple videos on new Panasonic camcorder). I ended up using 3840x2160 -29.97p/ HEVC Long GOP 150M 10 bit 4:2:0. Put it in VEG PRO 22 (WIN 11). Audio is great, but the video is like watching still frames that skip. Nothing smooth going. Tried different property settings, even as draft - same issues. not sure what to do now.

Comments

Dexcon wrote on 7/13/2025, 7:53 PM

One approach is to create proxies which are lower resolution copies of the original video. To create a proxy, go to the Project Media window, R click on the video listed there and select 'Create Video Proxy'. Though I haven't created proxies for quite some time, I recall that Vegas Pro's timeline will use the proxies in Draft or Preview mode but the original video will be used in Good and Best preview modes. When rendering, the original video will be used, not the proxies.

Cameras: Sony FDR-AX100E; GoPro Hero 11 Black Creator Edition

Installed: Vegas Pro 15, 16, 17, 18, 19, 20, 21 & 22, HitFilm Pro 2021.3, DaVinci Resolve Studio 20, BCC 2025, Mocha Pro 2025.0, NBFX TotalFX 7, Neat NR, DVD Architect 6.0, MAGIX Travel Maps, Sound Forge Pro 16, SpectraLayers Pro 11, iZotope RX11 Advanced and many other iZ plugins, Vegasaur 4.0

Windows 11

Dell Alienware Aurora 11:

10th Gen Intel i9 10900KF - 10 cores (20 threads) - 3.7 to 5.3 GHz

NVIDIA GeForce RTX 2080 SUPER 8GB GDDR6 - liquid cooled

64GB RAM - Dual Channel HyperX FURY DDR4 XMP at 3200MHz

C drive: 2TB Samsung 990 PCIe 4.0 NVMe M.2 PCIe SSD

D: drive: 4TB Samsung 870 SATA SSD (used for media for editing current projects)

E: drive: 2TB Samsung 870 SATA SSD

F: drive: 6TB WD 7200 rpm Black HDD 3.5"

Dell Ultrasharp 32" 4K Color Calibrated Monitor

 

LAPTOP:

Dell Inspiron 5310 EVO 13.3"

i5-11320H CPU

C Drive: 1TB Corsair Gen4 NVMe M.2 2230 SSD (upgraded from the original 500 GB SSD)

Monitor is 2560 x 1600 @ 60 Hz

RogerS wrote on 7/13/2025, 10:20 PM

Are the settings in preferences/ file io on their defaults? I would think the 4070 could decode this without too much trouble. This is an 8-bit project and no Fx are added, right?

ChasMc wrote on 7/14/2025, 8:07 AM

Not all settings were in default. I had checked the two experimental items below the main ones. This video is a 10 bit 4:2:0 that I had stated in my original post, but so far just original video.

I did read in some other posts something about the HEVC (experimental) sometimes works better with it not checked. Well, I did try unchecking it and it does work better that way. Still not 100% smooth but that might be being a 10 bit video. In the properties there aren't any 4k 16:9 29.97 settings.

 

Dexcon wrote on 7/14/2025, 8:14 AM

If you select the 'QFHD 24p (3840x2160, 23.976 fps)' template, you can manually change the frame rate field to 29.97 fps and thus create a custom template which can be saved for later use.

Cameras: Sony FDR-AX100E; GoPro Hero 11 Black Creator Edition

Installed: Vegas Pro 15, 16, 17, 18, 19, 20, 21 & 22, HitFilm Pro 2021.3, DaVinci Resolve Studio 20, BCC 2025, Mocha Pro 2025.0, NBFX TotalFX 7, Neat NR, DVD Architect 6.0, MAGIX Travel Maps, Sound Forge Pro 16, SpectraLayers Pro 11, iZotope RX11 Advanced and many other iZ plugins, Vegasaur 4.0

Windows 11

Dell Alienware Aurora 11:

10th Gen Intel i9 10900KF - 10 cores (20 threads) - 3.7 to 5.3 GHz

NVIDIA GeForce RTX 2080 SUPER 8GB GDDR6 - liquid cooled

64GB RAM - Dual Channel HyperX FURY DDR4 XMP at 3200MHz

C drive: 2TB Samsung 990 PCIe 4.0 NVMe M.2 PCIe SSD

D: drive: 4TB Samsung 870 SATA SSD (used for media for editing current projects)

E: drive: 2TB Samsung 870 SATA SSD

F: drive: 6TB WD 7200 rpm Black HDD 3.5"

Dell Ultrasharp 32" 4K Color Calibrated Monitor

 

LAPTOP:

Dell Inspiron 5310 EVO 13.3"

i5-11320H CPU

C Drive: 1TB Corsair Gen4 NVMe M.2 2230 SSD (upgraded from the original 500 GB SSD)

Monitor is 2560 x 1600 @ 60 Hz

ChasMc wrote on 7/14/2025, 8:33 AM

OK, I can try that. Thanks.

 

RogerS wrote on 7/14/2025, 8:58 AM

I'd highly recommend not using legacy AVC /experimental HEVC as VEGAS is rapidly improving performance with NVIDIA GPUs.