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Macbook Pro (16" 2019)
macOS: Big Sur v11.2.3
Intel Core i9 (2.4 GHz 8-core)
Memory: 32 GB
Discrete GPU: AMD Radeon Pro 5500 8 GB
My Project:
Consists of 2 clips, each ~1.5 GB in size (1280x720). All I'm really doing is splitting the clips into segments and mixing the two clips together. I have 10 fade transitions in between the clips and 1 short title. At this point, the preview during editing is flawless. I can see exactly how the transitions look so I know if I like it or not.
As soon as I add an 11th fade, the preview starts lagging and getting choppy. I cannot view the transition properly, and that makes it nearly impossible to tell if I like it or not. Other parts of the movie are choppy also, where as before the 11th fade, it was flawless.
Am i really already pushing the brink of what the program and my hardware can handle?? I wouldn't think I'd be even close to that.
What I've tried:
Most of the movie is in track 1, but I have some in track 2. I have cut out clips in track 3 & 4 that I most likely won't use, but didn't want to delete them yet. So I have disabed audio/video on tracks 3 & 4.
I tried lowering the preview qualtiy to the lowest setting, but it doesn't help at all.
I tried selecting just the transition area (where I added the 11th fade) and rendering the preview. That helped a tiny bit, but still unable to get a smooth preview.
I have no other apps open. In the activity monitor, in the Energy tab, under Graphics Card, it shows "No." This used to say High Perf in this column. I guess that means (specifically for PowerDirector) that it's not REQUIRED. I was confused because I thought it was showing whether or not the discrete graphics card was being used or not.
However, when I look at the GPU history, while playing the preview video in PowerDirector, I can see all the GPU usage is with the AMD and not the integrated GPU. Also, after I changed the Battery settings to not select Automatic Graphics Switching, I can see now in the Activity Monitor, in the Energy tab, at the bottom, it says Graphics Card: High Perf. Whereas before I changed that setting, it was showing Integrated.
As far as I can see, I have plenty more than the minimum required hardware. I made sure I'm using the high performing GPU, not the integrated one. PowerDirector is up to date. Changing the preview quality and even rendering part of the preview has little to no affect on the lag and choppiness.
It's so baffling to me. If I undo adding the 11th fade, so there's only 10, the entire movie previews flawlessly. The movie right now is ~25 mins long. I want to add a few more fades, and I feel like with my setup, I should be able to have a much longer video, with many more transitions, effects, or whatever, without having an issue with the preview.
I don't think I should have to use Shadow Files either.
Only thing I can think of at this point, is to Produce the movie with the 10 fades, start a new Project with that file, and go from there, but that just seems completely ridiculous, and limits what I might want to change before the final version.
I feel like I've covered a lot of bases, but hoping someone out there has a solution that I haven't already tried. I was going to upgrade my macOS to Monterey in a somewhat hopeless attempt at a fix; I doubt it will help, but I wanted to see what you guys thought first.
Thanx in advance!
This message was edited 1 time. Last update was at Jan 26. 2022 03:52
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, so all you can do is PD preview set to HIGH preview resolution , but i think we need LOW preview resolution 
.