Need help for Vegas Pro 22 UI Lag

Krym wrote on 8/15/2025, 1:06 AM

Hello, I have switched over to Vegas Pro 22 (239) from Vegas Pro 19 (651) and I have been testing to see how the new Decoder would work on my PC. At first I found it very fast, barely any UI lag when I put a couple of clips over. However as soon as I have a bit more clips (around 2-3 minutes) the UI become very unresponsive or delayed but when I do it on Vegas Pro 19 with the same clips Legacy AVC decoding on, it works fine beyond 5 minutes of clips. I tried to "copy" the Preferences and Internal settings (OpenCL/GL Interop) that I found what works for Vegas 19 3 years ago and still does not have any effect. I have tried the tips both on here and on reddit and found that enabling Legacy AVC on 22 does alleviate some of the UI lag but my gripe is that I should not need to do that on the newer decoder. Any other suggestions on what I can do? Here is one of the media info that is from a clip of many.

PC, OBS, Drivers are on my signature

Comments

RogerS wrote on 8/15/2025, 1:52 AM

Sorry to hear it isn't working well. The meaning of legacy AVC in 19 and 22 is different. In 22 legacy AVC decoding is the "non" legacy decoder that 19 uses by default.

In general for OBS AVC in MP4 container with a keyframe interval of 1s or so yields editable files. For existing files you could try a

I'd put 22 back on defaults with file io using your NVIDIA GPU for decoding with MxCompound (non legacy). As a test if you reencode a file with ShutterEncoder or Handbrake with advanced features GOP=60 or keyint=60 respectively does it help?

Krym wrote on 8/15/2025, 3:19 AM

Sorry to hear it isn't working well. The meaning of legacy AVC in 19 and 22 is different. In 22 legacy AVC decoding is the "non" legacy decoder that 19 uses by default.

In general for OBS AVC in MP4 container with a keyframe interval of 1s or so yields editable files. For existing files you could try a

I'd put 22 back on defaults with file io using your NVIDIA GPU for decoding with MxCompound (non legacy). As a test if you reencode a file with ShutterEncoder or Handbrake with advanced features GOP=60 or keyint=60 respectively does it help?

Hello thanks for the reply,

 

 

Its my first time using Handbrake (i edit as a hobby) and I do not know if I did it correctly but I handbraked a few clips (that were about 2-3 min each) and the scrubbing feels much better and faster actually on the non legacy decoder (mxcompound) although i havent done any heavy fx yet or some complicated crops. Here are some screen shots on what I did (handbrake preset) i chat gpt'd how to do the GOP or keyint part. and i used the Web Creator 1440p@60 2.5k preset as a base and added on the Keyint settings

 

 

RogerS wrote on 8/15/2025, 3:26 AM

For Handbrake I would start with the production standard preset and then edit the box at bottom to change the keyint.

That should give you good decoding performance which is really the base for everything else (if VEGAS struggles to even read the media you're in trouble). Crop/Fx are on top of that and handled by different parts of your GPU.

Krym wrote on 8/15/2025, 4:20 AM

For Handbrake I would start with the production standard preset and then edit the box at bottom to change the keyint.

That should give you good decoding performance which is really the base for everything else (if VEGAS struggles to even read the media you're in trouble). Crop/Fx are on top of that and handled by different parts of your GPU.

Thanks, I will play with Handbrake for now and keep legacy avc until i record new clips, if media is really the problem, can you look at these obs settings? Thanks again.

 

RogerS wrote on 8/15/2025, 4:34 AM

Your settings should work okay. Not sure how detailed what you are capturing is but 14 might be excessive unless there's a lot of detail. Maybe 18?

Krym wrote on 8/15/2025, 4:41 AM

I will try it out, however this current settings I have is what I used for the clips that Vegas seems to not like so much that it hogs all the gpu resources

Your settings should work okay. Not sure how detailed what you are capturing is but 14 might be excessive unless there's a lot of detail. Maybe 18?

 

RogerS wrote on 8/15/2025, 5:11 AM

Okay I wasn't sure if this was the before or after settings. What if you changed the turning to match what you are doing in Handbrake if that's working?