Rendering

RealSpreezo wrote on 1/30/2026, 8:53 PM

Hi, I’m having a really frustrating issue with Vegas Pro 23 where I can’t get a long 4K video to finish rendering as one file. I’m trying to render a 6:26:14 4K video, and whether I use Internet UHD 2160p 29.97 FPS or Internet UHD 2160p 29.97 FPS (NVENC), the render always reaches around 95% and then crashes, so I never get a full video. I normally use Internet UHD 2160p 29.97 FPS (NVENC) because Internet UHD 2160p 29.97 FPS renders much slower and I have to wait more than 24 hours, which is not realistic for me, but the crash happens with or without NVENC as well. When the render starts, Vegas estimates the file size at about 151.2 GB, but once rendering actually begins, the estimate changes to around 140.8 GB. I’ve already tried lowering the bitrate, changing settings in Vegas Pro preferences, restarting Vegas Pro multiple times, and adding empty space at the end of the timeline, but nothing works unless I split the video into multiple parts, which I really don’t want to do. Is this a known issue in Vegas Pro 23 with very long 4K renders, and what is the correct way to render a 6+ hour 4K video as one complete file without the software crashing near the end?

Comments

john_dennis wrote on 1/30/2026, 11:12 PM

@RealSpreezo said: “I’ve already tried lowering the bitrate…”

Have you tried rendering to FHD (1920x1080)?

”… changing settings in Vegas Pro preferences, restarting Vegas Pro multiple times, and adding empty space at the end of the timeline, but nothing works unless I split the video into multiple parts, which I really don’t want to do.”

Do you have 450 GB of free disk space on your boot drive?

3POINT wrote on 1/31/2026, 12:56 AM

but nothing works unless I split the video into multiple parts, which I really don’t want to do.

Probably the best way, instead of wasting days with trying to render the full project. You can merge afterwards the multiple rendered parts seamless together (without re-encoding) to a final project with free shutter Encoder. This way I always work with larger projects.

Howard-Vigorita wrote on 1/31/2026, 3:04 PM

@RealSpreezo A way to render in sections that I find convenient, is to mark my long projects into abutting regions and render the regions with a batch-render script. I use the one linked in my signature which is the stock script that comes with Vegas modified to use region names for naming the renders. I also added a timer since I often start it before hitting the sack and like to see how long it took when I wake up in the morning. As long as the regions have no spaces in between and markers are on quantized frame boundaries, they should glue back together seamlessly with Shutter Encoder as @3POINT suggests.