Why do titles slow performance?

I am using Studio 16 and to do this I had to build a new pc - i9 9900K at 4.8 GHZ, 64 GB DDR4 2660 memory, Samsung 970 EVO NVM2, Z390 Gigabyte Designare mother board, Samsung 860 and 870 SSDs, Windows Pro 10/64. I am editing UHD clips and watching the rendering meter go from nearly 60 fps with only the video drop to 12-17 fps when simple title blocks are added. Is this normal? I am not using fusion titles, just lower third titles stacked on top each other. I am rendering Sony XAVC S 2160p to 1080p.


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I've never seen the export speed drop when it comes to a normal Text title. That does sound weird.

what title specifically are you using?

If memory serves, some of the simple templates are now fusion driven.

All the Fusion titles have the lightning bolt to the left. You'll see it's only Text+ that has that.

I am using Studio 16 and to do this I had to build a new pc - i9 9900K at 4.8 GHZ, 64 GB DDR4 2660 memory, Samsung 970 EVO NVM2, Z390 Gigabyte Designare mother board, Samsung 860 and 870 SSDs, Windows Pro 10/64. I am editing UHD clips and watching the rendering meter go from nearly 60 fps with only the video drop to 12-17 fps when simple title blocks are added. Is this normal? I am not using fusion titles, just lower third titles stacked on top each other. I am rendering Sony XAVC S 2160p to 1080p.


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And without titles, during the render: it makes a big difference in speed with the same settings?

Jean Claude brings up a good point.

Turn off the titles. If the render still slows down, it isn't the titles that's causing it, it's the footage underneath.

I wanted to add I have a GTX1070/8 GB.

I rendered the same video and native or Nvidia makes no difference. I tried 3 things:

1 with 2 title blocks stacked above video(not fusion titles, lower third text). Rendering was 17 - 20 fps
2 with only 1 title block - 30 - 34 fps
3 no title blocks - 66 - 85 fps

I am rendering H.264

When rendering there are mostly stacked title blocks but there are some video with no titles and the rendering ramps up to 50-72 fps.

No idea how a simple text title can have that much impact.


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That does seem odd.

And with the cache ON: it's not better?

I solved my problem. I went to project settings and changed:

Timeline resolution from 3840x2160 to 1920x1080 HD
Image scaling from UHD to HD
Playback from UHD to HD
Video monitor to HD 1080p 24

With these settings I re-rendered and got
No titles - 80 fps
1 title - 50-60 fps
2 titles - 50 - 55 fps

The complete rendering of the 18:44 video took 10:03 minutes!

I am more than happy!

Now, can anyone explain why? My original effort was the default mp4 YouTube setting but that has a default of 29.997 that cannot be changed to match my original 23.397. My video was shot UHD and 24p, 100 mbits.


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I wanted to add I have a GTX1070/8 GB. I rendered the same video and native or Nvidia makes no difference. I am rendering H.264...

My suggested workaround: don't render to H.264. Render to a mezzanine format like DNxHD or DNxHR. Once you have that file, run it back through Resolve or another program and then create the H.264 from that file. I bet it will go considerably faster (or at least consistently).

I think when you're hitting the computer with XAVC S compressed video (which I believe is an H.264 variant), and you're putting titles on top of it, and you're running at 60fps, and you're in 4K, and you're rendering H.264 out of the computer, that's a lot of stress all the way around. Massive hardware (CPU, RAM, GPU, I/O, etc.) might be enough to reduce this problem, but you're trying to leap over a very big wall.

I generally try to consider the intended distribution chain of the project, and then adjust the workflow accordingly to match the available schedule and budget we have to work with. For example, I'd avoid 60fps unless the client demanded it, knowing that 30fps/29.97fps is going to be fine if it's just online or broadcast TV. I'd create 4K transcodes for all the XAVC files provided it was a very high-quality codec like ProRes 444 or DNxHR HQX, and I'd only render to mezzanine files. I try to pick my battles and avoid slowdowns in Resolve if at all possible, provided it has zero effect on picture quality.

We do try to work entirely in 4K with 4K source material, even when rendering out to HD, because I'm convinced it scales better than putting the 4K in an HD timeline. I admit, the differences are small, but I've gotten caught by this a few times and learned from those lessons. (The good news is, as we used to say in the 1980s, "it's not a mistake if we caught it before the show ships.")

Thanks Marc, I had forgotten the 60 fps setting.


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Hi, I'm running into the same issue so I guess not much has changed since September.

In my case, I'm just using the simple Text and not Text+ but I have my Timeline resolution set to UHD.

As soon as I switch to HD with the Text, it plays back smoothly.

If I remove the Text while in UHD, it plays back smoothly.

I get this as well and put it down to the processing required taxing the computers resources. All my footage is MP4 50fps. I just walk away and let it render in whatever time it takes.

I solved my problem. I went to project settings and changed:

Timeline resolution from 3840x2160 to 1920x1080 HD
Image scaling from UHD to HD
Playback from UHD to HD
Video monitor to HD 1080p 24

With these settings I re-rendered and got
No titles - 80 fps
1 title - 50-60 fps
2 titles - 50 - 55 fps

The complete rendering of the 18:44 video took 10:03 minutes!

I am more than happy!

Now, can anyone explain why? My original effort was the default mp4 YouTube setting but that has a default of 29.997 that cannot be changed to match my original 23.397. My video was shot UHD and 24p, 100 mbits.


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You have changed project from UHD to HD and you are surprised that it's so much faster?
Resolve title engine seems to be quite slow so for UHD project rendering is quite slow.

Yeah, something is really wrong here.
Playback is really choppy with titles.

Cant handle 4 simple Text layers on one clip in UHD timeline.

Both my Radeon VII:s is almost idle at playback and render on Mac Pro 7,1 16-core 196gb Ram.

Jerry

I had choppy playback with fusuion titles. It dropped from 30 fps to 8 fps and even as low as 1.5 fps.

I made the following changes and it worked for me -

Menu --> Playback --> Proxy Mode --> Quarter Resolution
Menu --> Render Cache --> User
Menu --> Fusion Memory Cache --> On

It will play choppy the first time but then renders and should play smooth the second onwards.

having this exact issue. while my hardware is distinctly not the best for video work it's plenty good for the most part but once more than one layer of titles comes into play - simple, static titles with basic fade in/out transitions - performance slows to a crawl. i have tried performance optimizations that have been recommended throughout this thread and a handful of others but nothing fixes it other than removing the titles. multiple layers of video with keying, keyframing and transitions work just fine but titles seem to break something.

EDIT: to be clear - these are non-fusion titles. just normal text in a solid color with a small border in normal compositing mode at full opacity.

handling titles on resolve in the time line is a nightmare....

the software freezes for a a few good seconds before snapping out of it and letting you just move it a bit on the timeline, or change a value in it....
btw, it happens also on subtitle edits.

defiantly a bug.

(I have a high-end workstation, so no way it's gotta do with hardware. and the software is super quick in every other aspect).


waiting eagerly for the fix...

I.

Having the exact same issues. i710700k, 3090, 64GB RAM. No matter what combination of settings I use, including the ones listed here....any Title or Transition runs my 3090 up to 10 or 12GB usage and it takes up to 3 minutes for the Title to cache before it will play back...otherwise it's jumpy, freezes or skips until the Red bar turns Blue. No video, no audio...just opening a new project timeline, adding two 3D Titles with a transition between them and I have to wait about 3 minutes before I can play them. Then, if I make a single change...like the color of the text, I wait again for 3 minutes while it changes the text color. If anyone has come up with the answer as to why, PLEASE SHARE!

Also having the same issue! I have an Ryzen 7 5800x, GTX 1060, and 32GB of RAM. I have no issues scrubbing through my timeline of nvidia shadowplay clips (1080p 60fps) and rendering them at around 100fps.

Creating a fusion composition and adding text to it tanks this. It makes timeline scrubbing unsmooth and tanks rendering to 40-50fps. It's the most bizarre thing and incredibly frustrating.

I have the same problem in my project. I create a lot of Fusion Compositions with a bunch of Text+ nodes.
It turns out they are incredibly slow.

I ran the following performance test:

- Create a 1 minute Fusion Composition with just a Background node (gradient 4 corners). Render time is 12 seconds.
- Add a Text+ node and merge it on top of the Background. Render time is 13 seconds, so overhead is negligible.
- Animate the Text+ node (Write On bar) at the beginning and end of the composition. Render time goes up to 23 seconds.
- Add 2 more animated Text+ nodes. Render time goes up to 40 seconds.


This is a trivial "Power Point like" Fusion Composition where the only animations are the Text+ Write On.
So yes, titles are incredibly slow.