Ah, now I see something! If I drop the original clip in the timeline and try speeding it up to 32x, using real-time preview it plays for about second and then freezes after displaying a few frames. It doesn't freeze if I use non real-time mode, but it takes about 28 seconds to get through the whole clip, even though its actual playing length is only 2.27 seconds and it will take even longer on your hardware

I get a similar response using my produced (.m2ts) clip AND when using PD12, so this isn't something unique to PD13 or to your source clip.

Based on what I'm seeing, this seems to be a case of asking too much to get anything close to real-time performance out of even high-end hardware, and the easiest (least frustrating) approach is probably to do one step at a time and produce afterwards.

For example, I was able to produce the clip to 32x in 32 seconds, so it took roughly half the time to produce the full clip at normal speed. I could then place that clip in the timeline and it previews exactly like you'd want it to

In other words, here's how to get through this project: Set up your speed change and produce that to a high quality output. PD13 will automatically load that clip when you reenter the editing room, then place that clip in the timeline and do the next step in your editing process, produce that, repeat. I'm guessing that not only will this one-step-at-a-time approach be quicker, it will actually be enjoyable

Ok, maybe not quite enjoyable, but certainly a vast improvement over pulling your hair out in never-ending agony. I certainly hope so!


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DS365 | Win11 Pro | Ryzen 9 3950X | RTX 4070 Ti | 32GB RAM | 10TB SSDs | 5K+4K HDR monitors

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BTW, I uploaded the sped-up clip to the shared folder I mentioned in a previous post. Please grab that and put it in your timeline and try the preview function. It's beautifully smooth!

YouTube/optodata

DS365 | Win11 Pro | Ryzen 9 3950X | RTX 4070 Ti | 32GB RAM | 10TB SSDs | 5K+4K HDR monitors

Canon Vixia GX10 (4K 60p) | HF G30 (HD 60p) | Yi Action+ 4K | 360Fly 4K 360°

Awesome, thanks! The clip looks great. I never thought about producing only that clip then putting it into the video. Duh! I guess my expectations were a little too high at times. Last time I did a lot of time stretch was using Sony Vegas and much lower quality material.

I did try disabling the NVIDIA card, which caused my games to slow to a stand still. So, it NVIDIA card is definitely being used. I went ahead and did a clean uninstall, registry scrub, and clean install of the drivers. No change, but doesn't hurt. My settings in PD13 match yours as well.

What exactly is the MultiAVCHD test? Just to see if the codecs are loaded? I failed all three tests, so perhaps I will take a look into ensuring all those CODECs are loaded.

The preview still stutters a little at times during the rest of the video, but usually in conjunction with some sort of effect or transition which I would expect (although sometimes it just stutters fo no apparent reason). The massive grind to a halt is what really surprised me though.

I will keep investigating, but for now, it looks like this is mostly solved! Thanks!

Ryall

That's really great to hear!

You don't need to worry about the multiAVCHD test at this point. All computers will fail the test unless you've installed and configured the apps as directed in the tutorials, and we've clearly determined that the problem isn't the result of a mangled or missing codec.

It sounds like everything else is running normally on your machine and I wouldn't spend any more time trying to tweak it.

Unfortunately, it's often difficult to know when a specific effect is going to ask too much of your hardware to give you real-time performance. I hadn't had any problems speeding up or slowing down a high-def clip until this came along, but the clips I was working with were less than 20 seconds long and apparently weren't long enough to cause problems.

In my experience, it's a just fact of life that you won't be able to preview every HD clip with various effects or transitions in real-time without some pauses, but usually setting the preview quality as low as you can stand or choosing the non real-time preview are the workarounds.

For individual clips like this where you need to throw on either lots of effects or just one that's intensively computational, the takeaway is to let your computer do the hard work once to produce it, and then both you and the computer can make quick(er) work on the rest of the editing.

Finally, if you decide that your issue is actually resolved, please edit the subject line on your original post to start with something like SOLVED so that other people will know we figured this one out. I'm definitely happy about this one!

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DS365 | Win11 Pro | Ryzen 9 3950X | RTX 4070 Ti | 32GB RAM | 10TB SSDs | 5K+4K HDR monitors

Canon Vixia GX10 (4K 60p) | HF G30 (HD 60p) | Yi Action+ 4K | 360Fly 4K 360°

Quote: I did try disabling the NVIDIA card, which caused my games to slow to a stand still. So, it NVIDIA card is definitely being used.

Yes, is used in games... but that doesn't mean is used everywhere.
That's why I keep telling people to avoid using laptops for video editing - the default video used in laptops is the integrated Intel one, nVidia jumps in only for specific tasks (updated in their drivers) or if you FORCE its use with a certain program (like PD). They call this garbage "Optimus Technology": http://www.nvidia.com/object/optimus_technology.html

Even then, the video stream has to go physically trough the Intel video card because this is where your laptop screen is connected! You cannot just unplug it from Intel and plug it in in nVidia, like you cold do it on a desktop.

PS: My older Dell M4400, with i7 from first generation (that doesn't have integrated video), has the nVidia Quadro card used all the time because... it is the only video card inside it. No need to play around with Optimus.

Yeah Optimus is a double edge sword. Sounds great on paper, and is great for battery life, but I am starting to get annoyed because there are a lot of quirks. My old laptop with the AMD card had no such mess, and always ran on the big card... only had about 40 minutes of battery life though lol.

As far as Optimus goes, my 2 cents is that it seems to be doing everything correctly here.

We ended up going down a few rabbit holes on this thread but the actual issue was OP asking his hardware to do more than it could handle in real time. While that's a plain and simple answer, it wasn't obvious at the start and it was only when my top-end desktop couldn't handle the workload either that I realized it wasn't an issue with his OS or with how Optimus and/or PD pulls in the 770M when needed.

From where I sit, all of that seems to be working as promised - and that sure beats 40 minutes of battery runtime

YouTube/optodata

DS365 | Win11 Pro | Ryzen 9 3950X | RTX 4070 Ti | 32GB RAM | 10TB SSDs | 5K+4K HDR monitors

Canon Vixia GX10 (4K 60p) | HF G30 (HD 60p) | Yi Action+ 4K | 360Fly 4K 360°

Project complete. Learned a lot on this one. Thanks everyone!

Awesome! I'm glad we could help.

Can you please update the original subject line to SOLVED so the next person can learn from all our blood, sweat and tears?

YouTube/optodata

DS365 | Win11 Pro | Ryzen 9 3950X | RTX 4070 Ti | 32GB RAM | 10TB SSDs | 5K+4K HDR monitors

Canon Vixia GX10 (4K 60p) | HF G30 (HD 60p) | Yi Action+ 4K | 360Fly 4K 360°

You bet, sorry I forgot to do that!