Render Problem with GL Transitions – Vegas Pro 21

hitman47 wrote on 8/3/2025, 4:11 PM

Hi everyone,

I’m facing a strange issue with my project in Vegas Pro 21.

I’ve used 5 GL transitions in my timeline. They all play correctly in the preview and the settings are properly configured. However, when I render the final video, some of the transitions do not appear as expected — in fact, one or more seem to be missing or incorrectly displayed in the final output.

To clarify:

All transitions are visible and functional inside the timeline.

No nested timelines or compound clips are involved.

I’ve tried both AVC and NVENC renders – same result.

The transitions are directly applied between simple video clips.

Has anyone encountered a similar problem? Could this be a bug, or is there a workaround (maybe related to cache or GPU settings)?

Any help would be greatly appreciated — I’m just about to finish this project before leaving on vacation, and this bug is really holding me back.

Thanks in advance!

Comments

Gid wrote on 8/3/2025, 4:40 PM

@hitman47 Hi, I think this would have to be replicated, so -

'simple video clips' - can you give the MediaInfo of the clips, & say which GL transitions you're using?

Also a full screen picture of the entire Vegas UI, a picture of Preferences - 'Video' & 'File IO' would be useful.

Vegas Pro 18 - 22
Vegas Pro/Post 19
Boris Continuum & Sapphire, 
Silhouette Standalone + Plugin, 
Mocha Pro Standalone + Plugin, 
Boris Optics,
NewBlue TotalFX
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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

 

hitman47 wrote on 8/3/2025, 4:49 PM

Most of my files are mp4 and my project hd 1920x1080. the gl transitions are cube, directional warp, Water Drop, cross zoom.