Blackmagic Forum

Hi, I am testting Fusion and I have problem with Play back speed. DR17b7 can not achieve 25 fps the one exr sequence files (without additional layer inside)

PlayBack speed varies between 18..20 fps ?!

My project is 25fps HD
I set Render Cache to be on my M2 drive
My 3D sequence files is on M2 drive
I have 128 GB of RAM

Is it problem with beta version or I forgot activate some button?

What I discovered my back speed is near 25 when I'm playing exr sequence without Alpha channel but it is not a solution.

Does it play on Edit?

No nodes have been added?

My, project is completely empty, only 2 layers: beauty pass and normal pass.

beauty pass - 18 to 23 fps
Normal pass - 25 fps (sometimes drop to 24)

Sounds like you just need better hardware?

If my computer is not enough, what kind of monster I should buy to play one layer of exr ?

AMD Ryzen 9 3900X 12-Core 3.79 GHz (Threads 24. Max Boost Clock Up to 4.6GHz)
RAM 128 GB
2 x NVIDIA GeForce RTX 2070 SUPER (Studio Drivers)
2 x M2

Let be honest. I don't understand philosophy blackmagic. From time to time I check Fusion and more and more it looks like story of Softimage XSI. Good software in bad hands.

I've seen others frequently report that stand alone Fusion has significantly better performance. Maybe try that?

Great idea.
But right now there is no option to test Fusion Studio - even for 30 days free trial (why?).
There is "DR Fusion" (free but not working like it should ) and pain version "Fusion Studio" for $295.

What I want to say, I really want believe that something will change in Blackmagic and how they want develop fusion for helping artists in everyday work and projects.

The free Fusion works fine here (with some limitations). What exactly is not working for you?

If it's only about speed, you'll need to understand that compositing software has a very different approach to speed as opposed to editing software. Give the 7 days demo of Adobe's After Effects a try with your EXR footage and you'll see what I mean

I work at After Effect for 12 years across 5 companies. Most of time with compositing of sequences from 3D.

OK, so now I can understand your expectations.
So, next, what does not work for you in the free standalone version of Fusion?

Problem with cache in DR17b7 Fusion
beauty pass (with Alpha channel) - 18 to 23 fps
Normal pass (without Alpha channel) - 25 fps (sometimes drop to 24)

In Compared to After Effects:

no problem 25 fps

Some advice?

I have no problems here to play back EXR sequences (each frame has 16.6 MB) from an SSD-RAID in a Fusion clip in the Edit page.
It's a 24 fps project, I'll try something faster later.

So, I can get around 45 fps in HD from a 60 fps sequence and over 30 if it has an alpha channel. No caching or anything.
And that's my humble 2017 iMac. Your machine should be faster, so something seems weird with your results.
What's the media from where you read the EXRs?

Another test: superimposing the background track and one with alpha as two layers in Resolve runs at about 30fps. If I combine those two tracks in the Fusion page by a simple merge, I get 12.5 fps before buffering. So, Fusion definitely adds some overhead.

Uli Plank wrote:, Fusion definitely adds some overhead.

That's is the point

I get around 2.4FPS playback in the Fusion page once the effects are cached to RAM. The only way I can get real time playback is if there are no effects added to the clip in Fusion. The effects will play in real time on the edit page once they are cached. This is in Resolve Studio 17.0 B Build 27