Blackmagic Forum

I think I may be having the same problem as here: viewtopic.php?f=21&t=62912

When I zoom in and out on my timeline (which I do all the time), my CPUs max out and the system lags. Everything else about editing on my new machine is great. But this is baffling me.

I have a Threadripper 1950X, so 32 threads, all maxing out to zoom in or out. My 1080Ti isn't even really touched at all and I'm using only 8 of my 32GB of RAM.

I did try cutting my timeline (about 40 minutes long) into smaller timelines. The one I have right now is 4 minutes long with a mix of pictures, 1080p webcam captures, 4K GH4 footage, stuff off my Windows Phone, etc. The Timeline Resolution is 1920x1080.

Is there something I've overlooked for making zooming less taxing on my system? I was worried that, since DaVinci Resolve historically has used the GPU far more than the CPU, I was wasting my money springing for a Threadripper ... but is it not enough?

Thanks!

~Luke

Do you use thumbnails on the timeline clips? Try disabling thumbnails in Timeline View Options and see if it improves the performance.

Igor Riđanović wrote:Try disabling thumbnails in Timeline View Options and see if it improves the performance.

Brilliant! Thank you, Igor! That helps a ton.

Now to get used to editing without those tiny little clip reminder cues [grin].

Thanks, again!

~Luke

not seeing any issues here with the thumbnails on -or- off

someone else reported sluggish behavior with long gop codec's

i'm working with R3D & EXR source's today tho

Luke Holzmann wrote:

Igor Riđanović wrote:Try disabling thumbnails in Timeline View Options and see if it improves the performance.

Brilliant! Thank you, Igor! That helps a ton.

Now to get used to editing without those tiny little clip reminder cues [grin].

Thanks, again!

~Luke

I don't use thumbnails myself but I would think that once they are generated and cached at all zoom settings there is no performance penalty.

Sent from my S60 using Tapatalk

Couple days ago we were talking about this, try what we were doing here viewtopic.php?f=21&t=68894 and see if that works for you. The main thumbnail generator is quite buggy right now, and for what I know BMD is looking in to it.

Sandro Circi wrote:...try what we were doing here viewtopic.php?f=21&t=68894 and see if that works for you. The main thumbnail generator is quite buggy right now, and for what I know BMD is looking in to it.

Sandro, that does work as described in the video. Fascinating! So I was right in assuming there was just some non-optimization in Resolve that was causing my performance issues... I'm looking forward to a fix for this in coming updates. [grin]

I don't know if I'll keep my system on the "all thumbnails all the time" option for two reasons, however:
1. The system still "locks up" a bit when I stop playback and need to jump somewhere else on the timeline (not nearly as badly as with the middle option, but still just bothersome enough to block snappy editing).
2. I really don't like that much visual input on my timeline ... though that's merely personal preference [smile].

I'll leave it on this mode for a bit and see how it goes.

Thank you, so much, for sharing Dave's link. So interesting!

~Luke

Similar problem! When I zoom the timeline, Resolve starts to re-generate all the clip thumbnails. It takes a lot of time. That makes it almost impossible to work in Resolve since it freezes the system.



I think thumbnails should be cached someway.

PS: "Save Timeline Thumbnails With Project" and "Optimized Media" don't help at all in my case.

I see none of this. Running CPU intensive 50fps h264 in the timeline thumbnail redraw is instantaneous. This is either using the zoom icons or alt+mousewheel.
The only suggestion I can make is that you do a clean install of your GPU driver and see if that makes a difference.
I am assuming that you are using an Nvidia GPU.

My experience is the same as Charles'. It's pretty quick.

And that's on a lowly i5-2500K and GTX 1070.

Charles Bennett wrote:I see none of this. Running CPU intensive 50fps h264

In my case I'm editing 4K h265 clips. And I can definetely see that clip thumbnails aren't cached. They are being re-generated every time. That's the problem. They should be cached.

If you editing h264, then you just probably don't notice this problem, but it still exists.