I too updated my video drivers (twice) with the most current build of Vegas 19 and am experiencing crazy amounts of instability while working on the timeline and rendering (I only updated them because I was having stability issues after updating to the latest version of Vegas 19). I'm using an Asus ROG Zephyrus G14 with the following specs:

Windows 11 64
Processor    AMD Ryzen 9 5900HS with Radeon Graphics           3.30 GHz
Installed RAM    40.0 GB (39.4 GB usable)
Device ID    9606A7EA-2617-4398-BA92-F71151E235C1
Product ID    00325-82064-22743-AAOEM
System type    64-bit operating system, x64-based processor
Pen and touch    Pen support

I'm currently about to roll back to a 2021 nVidia driver for my device just for troubleshooting. Is there a way to roll back to the previous build of Vegas before the 643 Build?

I did find that if I use Intel QSV as my render option under HVEC I can get a stable render, but it takes soooo long to render out. using the AMD results in weird things in my render, like a fade getting stuck so that the entirety of the graphic's opacity is never shown, then it moves on to the next scene. nVidia renders typically result in crashes, either hard where the program disappears and the screen goes black, or I'm unable to even get task manager to show up, or it will end with the Vegas reporting window.

Just adding to this thread in case someone else has ideas or Magix takes note.

I am having this exact same issue on build 643, I thought I was going crazy. I am trying to edit 10-bit HEVC footage from a Panasonic HC-X1500. These files are not the most edit friendly, but have been quite okay in proxy mode on all versions of 19 Pro - until now. I can't even make it a minute before the screens go black and an error appears referencing mxhevcplug\mxvideoallocator.dll

I am on an Intel I7-6700k, 32 GB RAM, and RTX 3080 graphics card.

8 Bit and other types of footage working okay, only crashing with 10 bit footage.

@Eric-Berger Hi, have a look at this recent post about 10bit video & see if it's similar to your problem, https://www.vegascreativesoftware.info/us/forum/stuttering-playback-of-h-265-10-bit-4k-video-footage--136169/?page=1

@j.razz

“Is there a way to roll back to the previous build of Vegas before the 643 Build?”

Save a system image for free before installing each Vegas build or video driver.

https://www.macrium.com/reflectfree

https://www.aomeitech.com/download.html

I have gotten too comfortable with the stability of 17 and 19 that I thought those days were over and I became lax :)

I remember all the way back to Vegas 4 through 7 being stable, then with 8-16 or so stability issues almost moved me to DaVinci Resolve. 17 changed that for me.

Thanks for the reminder John! Hopefully stability is just around the corner again.

I just tried to update to the latest studio driver and had issues as well, it's possible the driver is buggy.

I just tried to update to the latest studio driver and had issues as well, it's possible the driver is buggy.

I went back to the previous driver from nVidia (it was still in my download folder), and still have issues unfortunately.

I rolled back NVIDIA drivers and then reinstalled the latest one and haven't had issues with 19 so I think the driver is likely fine and the issues are elsewhere.

J.razz, I don't have Radeon Graphics but those drivers have had a lot of issues over the last year. Perhaps try rolling back a few versions and see if it helps?

Also, "I did find that if I use Intel QSV as my render option under HVEC" - well that confuses me as your system has no Intel iGPU; does that just fall back to a slow software encoder?

 

Also, "I did find that if I use Intel QSV as my render option under HVEC" - well that confuses me as your system has no Intel iGPU; does that just fall back to a slow software encoder?

Apparently, as it is painfully slow. While everything else that successfully completed the render (with artifacts) within minutes, Intel QSV took over an hour and a half to complete the render process.

I'll see what I can figure our regarding the radeon graphics. Thanks for the tip!

Bummer...I reinstalled build 550 and V19 won't load the project I made in build 643.
I knew this to happen from one issue of Vegas to the next, but within the same version?? Really?
So I'll be stuck with the buggy build.

Unfortunately, sometimes adding features or fixing bugs requires this. They did put a warning with the download, but I personally feel it should pop up during installation as well.

@Gid; I browsed that thread and found it helpful. I did a reset of V19 (Control + Shift + Open) and unchecked "Enable legacy HEVC decoding" and set "Hardware Decoder to Use" to Off in the File I/O preferences. Currently no crashes and proxying out and playback of the 10-bit footage is working fine. Hopefully the OP has similar luck with flipping of similar settings, thanks!

Very similar to what was happening to me. Seemed like Vegas was crashing the video driver, monitor would black out, sometimes flash white, secondary monitor would go out and I'd have to reboot. I'm using same version of the Nvidia studio graphics driver but I don't think it's the driver as all was fine in 550. In fact, I've rolled back to 550 and haven't had issue since. If you share an error.zip file I'll crack it open and get callstack see if it's the same issue, you'll see problem with MXVideoAllocator.dll.

I did notice that Vegas was consuming massive amounts of memory for the project I was working it before it would crash. To the order of 28GB and not releasing the memory. This version has a serious bug and nobody from Vegas is talking about it. At least they could acknowledge the problem and let us know someone is working on it.

https://www.vegascreativesoftware.info/us/forum/vegas-pro-19-crashing-since-upgrading-to-build-643--136130/