@Vallen Also can you include your Graphics card (GPU), you can go to your icon at the top, click it - My Profile, & fill in your Signature with your Vegas version, Windows version & system specs, CPU, GPU, RAM etc. this will then show at the bottom of the comments & will help people help you 👍

See mine & Dexcon's Signature 👍
 

One idea- is "close media files when not the active application" checked in preferences? If so, try unchecking it?

How long is your project on the timeline? And does the project include a lot of FX particularly from 3rd party FX?

I've had that delay problem occur with a long 4K project (circa 3 hours) with Vegas Pro 18 on a much older Intel computer.

It might be the media that you are using that is causing the problem, so it would be great if you could upload a MediaInfo report on the main media that you are using - https://www.vegascreativesoftware.info/us/forum/faq-how-to-post-mediainfo-and-vegas-pro-file-properties--104561/

About 30 minutes but it can vary up to an hour and a half.
No 3rd party stuff. It has a lot of fade transitions for the most part with a few zooms and a ton of cuts n splices.
I tried with my GPU acceleration on and off and neither changed anything.
I haven't experienced this issue before this week and nothing has changed with my formats, software, or otherwise (not even any updates).
As for Media Info, I took 2 of the main files I'm using (I'm using multiple video and audio files) and have them here:

One idea- is "close media files when not the active application" checked in preferences? If so, try unchecking it?

I did try this and no change. Thank you.

Media1: https://www.toptal.com/developers/hastebin/evizoravip.yaml
Media2: https://www.toptal.com/developers/hastebin/ufubatupok.yaml

One idea- is "close media files when not the active application" checked in preferences? If so, try unchecking it?

I believe you will find that is the correct answer and solution.

@Vallen

@Vallen Hi, i'm sure someone will decipher the Media info, why have you changed it to a 'link'? it was ok as it was pasted in the comment, some people won't want to click on a link.

but interesting that it says Width : 1 920 pixels Height : 1 016 pixels Aspect ratio 1.890?

If i set a project to that format i get this

If i stretch the media to fill & render at those settings it looks like it's rendering that size

but the render file is a roughly 16:9, just a bit squashed?

You won't believe if I say it's normal. Reasons are:

1, your source material has variable high framerate which means your PC must invest huge resource merely for recompressing the edited frames.

2, along with numerous cuttings goes this invest quickly to its limit, e.g. RAM-limitation; the PC keeps busy with cache release or reload especially by interruptions, say you go away and click back to VEGAS.

3, VEGAS has improved its dynamic RAMmanagement heavely if you have more RAM (64GB or so), but you don't.

4, also the last, you use one drive for your system and media, that's very bad.

One idea- is "close media files when not the active application" checked in preferences? If so, try unchecking it?

I believe you will find that is the correct answer and solution.

@Vallen

I did try that and to no avail.

@Vallen Hi, i'm sure someone will decipher the Media info, why have you changed it to a 'link'? it was ok as it was pasted in the comment, some people won't want to click on a link.

but interesting that it says Width : 1 920 pixels Height : 1 016 pixels Aspect ratio 1.890?

If i set a project to that format i get this

It's 1920 x 1080 but I as it's windowed mode it's 1920x 1016 to cut the task bar off. Not sure how you got that.
As for the link, every forum I've ever posted in got upset for doing that so I put it in Hastebin after seeing that I couldn't have it be collapsible. -shrug-

 

You won't believe if I say it's normal. Reasons are:

1, your source material has variable high framerate which means your PC must invest huge resource merely for recompressing the edited frames.

2, along with numerous cuttings goes this invest quickly to its limit, e.g. RAM-limitation; the PC keeps busy with cache release or reload especially by interruptions, say you go away and click back to VEGAS.

3, VEGAS has improved its dynamic RAMmanagement heavely if you have more RAM (64GB or so), but you don't.

4, also the last, you use one drive for your system and media, that's very bad.

Can you expand on #4? I'm new to Vegas and am curious about this.

Use 2 hard drives, one for system, the other for media/data files.

 

4, also the last, you use one drive for your system and media, that's very bad.

Can you expand on #4? I'm new to Vegas and am curious about this.

@Vallen Thanks i was just curious 👍

As for #4, i do the same with 2 drives, 1 drive for programs etc.. the other for media etc.. I'm presuming it keeps the PC system uncluttered, keeps space on that drive for the system to work & reduces bottle necking, when you're working, editing, rendering etc there's info being transferred back & forth from the CPU, Ram & the drive/s, if it all has to pass through the same connection there's bottlenecking or whatever the right term would be, I'm prob talking crap but it's better to have info flowing out of one drive then into another using separate connections to the motherboard. 🤷‍♂️🙃

Re #4, I've long gone 1 step further: C drive (SSD) for the OS, D drive for media and E drive for the rendering destination, D & E being spinning disks. All drives are internal in a desktop.