Blackmagic Forum

It’s one of the most unstable apps I used.

Today I got at least 5 freezes of resolve with the only option to kill it with task-manager.

During our last project I got a “feature” where resolve freezing while autosaving, the saved file was okay but again I had to kill it.

I use a good pc with a i9 and a RTX3090

That’s super frustrating!


And at the point where I use a ofx plug-in like Boris, resolve renders up to 7 times slower then without.

I still use 16 and NOT the beta, hopefully it will be better with the final 17.

Not a constructive post but I have to post it to feel better ...


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Some things to check.

1. Nothing is overclocked.
2. You're working in an Admin account.
3. No third-party security is installed.
4. The system is dedicated to editing - no games, office, email, development, etc. is installed.
5. You're using the proper Studio driver from nVidia.

I can say “yes” to all suggestions you made.
I’m reading all the time if resolve is to slow you need to update your system hardware, but couldn’t it be that it’s more a software thingy ?

Don’t get me wrong, I like resolve much as the title says but it is simply to slow and unstable.

We will see what future versions bring ...


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It seems third party OFX plugins are rarely implemented in a way that Resolve likes. For example, the HitFilm OFX plugins are very fast in other hosts, but dead slow in Resolve. There are many more examples like this.

On the other hand, FilmConvert Nitrate is very fast in Resolve.

What is the concept of ofx when it works in one app but not good in the other?

Using the Boris Keyer is a challenge, the quality is superb but kills the experience due brutal slowness and ultimate count of crashes. I won’t use it after the subscription is over because of that.

What is good quality worth if you loose hours for rendering.

We do virtual production with unreal engine, it’s Keyer is not top notch quality right now but compared to my experience in resolve it is not that bad at all and it runs in real-time !

F.e. a six minute clip in HD renders without Boris in about 6 minutes, with it 1:30 hours !!! (Hours !!)

C’mon, that’s far from acceptable or what do you think ?


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Resolve has several good keyers, I've rarely had to key outside of Resolve. Fusion keyers are very good but likely slower, but hopefully not slower than Boris in Resolve.

andyprobst wrote:What is the concept of ofx when it works in one app but not good in the other?

Ofx api describes a plugin interface that host softwares can implement. It means that an ofx plugin has standardised access methods for exchanging parameters and data, so host supplies input data and params, plugin does its thing and gives results back. But host has no control over how exactly plugin itself is doing its stuff.

Resolve is somewhat special case because it heavily relies on gpu processing. If plugin has only cpu processing path, this means doing a device>host copy, plugin does work, host>device copy. In softwares where processing engine is mainly relying on cpu paths it can be faster. And there are lots of ways how to “do effects” so it isn’t as simple as “gpu good mkay” and “cpu slow yes”, processing engines are built with assumptions about needs of workflow etc and with these assumptions come specific constraints.

andyprobst wrote:it is simply to slow and unstable.

But that isn't normal. And I'm using much lesser hardware. So something is different about your system.

Try doing a project with all third party plug-ins uninstalled from the system.

Maybe that’s a problem host, it starts getting slow with Boris for sure.

I had to use Boris because it was a Multicam project and “color’s” Keyer is good but lacks on green spill control. Meaning I had to key color sensitive products (yellow colors everywhere, after de-spill the color was orange) Creating masks for all sensitive parts of the products would have taken much, much time. (In the end it maybe have been quicker then using Boris)


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In Resolve 17 the Color Warper tool helps with making selective changes. I imagine that might have worked unless the despill was too severe.

I won’t change over to 17 on the main pc until the final is out. Or can I use booth version at once on the same system ?

What’s about the database then, I do have to convert it for 17 right ?


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BMD recommends not using multiple versions on the same computer.

Yes, the database has to be upgraded for v17 and you can't open an upgraded database in v16.

You can have both versions on the same machine. And yes, it's not recommended, but when you are desperate to find the solution...
https://forum.blackmagicdesign.com/viewtopic.php?f=21&t=125045#:~:text=So%20yes%2C%20it's%20perfectly%20possible,several%20times%2C%20it's%20absolutely%20fine.
Btw. in Resolve 17 you have much more options for fine tuning your keys, so I think that all your work can be done without 3rd part plugins, that obviously makes you a lot of problems.