Video Mask Not Matching Preview Window [4k Intermediate Files]

Cawley wrote on 9/7/2025, 8:26 AM

I'm on the trial version of VEGAS Pro 22 [Build 250] and have an issue where a video mask does not reflect the proper 'masked out' area in the preview window.

I have only noticed this issue when using 4k Pro Res intermediate files.

As you can see below, I masked out the top left section of the video. However, the preview window shows a different masked out area.

No matter the section of video I mask, it is not reflected correctly in the preview window. I have also screen-recorded a video of the issue and can post if needed.

Specs

CPU: AMD Ryzen 5 3600

GPU: 5060ti

MOTHERBOARD: Asus TUF Gaming X570-Plus

RAM: G.Skill Ripjaws V 32 GB (2 x 16 GB) DDR4-3200 CL16 Memory

OS: Windows 10 Version 10.0.19045 Build 19045

Comments

Gid wrote on 9/7/2025, 9:15 AM

@Cawley Does it look correct if you change the preview to Good (Full)?

Vegas Pro 18 - 22
Vegas Pro/Post 19
Boris Continuum & Sapphire, 
Silhouette Standalone + Plugin, 
Mocha Pro Standalone + Plugin, 
Boris Optics,
NewBlue TotalFX
Desktop PC Microsoft Windows 10 Pro - 64-Bit
ASUS PRO WS WRX80E-SAGE SE WIFI AMD Motherboard
AMD Ryzen Threadripper PRO 3975WX 3.5GHz 32 Core
Corsair iCUE H150i RGB PRO XT 360mm All-in-One Liquid CPU Cooler
RAM 256GB ( 8x Micron 32GB (1x 32GB) 2666MHz DDR4 RAM )
2x Western Digital Black SN850 2TB M.2-2280 SSD, 7000MB/s Read, 5100MB/s Write
(programs on one, project files on the other)
Graphics MSI GeForce RTX 3090 SUPRIM X 24GB OC GPU
ASUS ROG Thor 1200W Semi-Modular 80+ Platinum PSU 
Fractal Design Define 7 XL Dark TG Case with 3 Fans
Dell SE3223Q 31.5 Inch 4K UHD (3840x2160) Monitor, 60Hz, & an Acer 24" monitor.

At the moment my filming is done with a Samsung Galaxy S23 Ultra 5G & a GoPro Hero11 Black

I've been a Joiner/Carpenter for 40yrs, apprentice trained time served, I don't have an apprentice of my own so to share my knowledge I put videos on YouTube.

YouTube videos - https://www.youtube.com/c/Gidjoiner

 

Cawley wrote on 9/7/2025, 9:33 AM

@Cawley Does it look correct if you change the preview to Good (Full)?

That worked!! The mask shows up correctly on all 'Good' and 'Best' preview settings when a SFVP0 proxy file is being used.

I deleted the SFVP0 proxy file, and now the mask shows up correctly on all preview settings... Draft, Preview, Good, Best.

Thanks so much!

Gid wrote on 9/7/2025, 10:08 AM

@Cawley 👍 Yeah, Preview uses the proxy file if one is created, Good & Best use the orig footage. I have proxies turned off & never use them so I don't know enough about this but I have seen other posts where Preview can cause similar issues..

PS. You've written your PC specs in the first comment, to save having to write them again in the future, go to the top of this page & click on your icon - My Profile, copy/paste your specs & which Vegas Pro version you're using into My Signature, this will then show at the bottom of your comments 👍 .

Last changed by Gid on 9/7/2025, 10:13 AM, changed a total of 1 times.

Vegas Pro 18 - 22
Vegas Pro/Post 19
Boris Continuum & Sapphire, 
Silhouette Standalone + Plugin, 
Mocha Pro Standalone + Plugin, 
Boris Optics,
NewBlue TotalFX
Desktop PC Microsoft Windows 10 Pro - 64-Bit
ASUS PRO WS WRX80E-SAGE SE WIFI AMD Motherboard
AMD Ryzen Threadripper PRO 3975WX 3.5GHz 32 Core
Corsair iCUE H150i RGB PRO XT 360mm All-in-One Liquid CPU Cooler
RAM 256GB ( 8x Micron 32GB (1x 32GB) 2666MHz DDR4 RAM )
2x Western Digital Black SN850 2TB M.2-2280 SSD, 7000MB/s Read, 5100MB/s Write
(programs on one, project files on the other)
Graphics MSI GeForce RTX 3090 SUPRIM X 24GB OC GPU
ASUS ROG Thor 1200W Semi-Modular 80+ Platinum PSU 
Fractal Design Define 7 XL Dark TG Case with 3 Fans
Dell SE3223Q 31.5 Inch 4K UHD (3840x2160) Monitor, 60Hz, & an Acer 24" monitor.

At the moment my filming is done with a Samsung Galaxy S23 Ultra 5G & a GoPro Hero11 Black

I've been a Joiner/Carpenter for 40yrs, apprentice trained time served, I don't have an apprentice of my own so to share my knowledge I put videos on YouTube.

YouTube videos - https://www.youtube.com/c/Gidjoiner

 

Cawley wrote on 9/7/2025, 10:21 AM

@Gid I have noticed something similar on 'Preview' and 'Draft' when using files containing an alpha channel, so I'm glad this was an easy solution. And thanks so much for the 'My Signature' tip - I appreciate your help!