Thanks Nick,

I've tried these and it doesnt seem to make a lot of difference
(the most important, the reboot i had already tried of course)

I noticed in this list nothing is said about the settings on the video tab of the prefs?
Does that mean it doesnt matter much for timeline playback?

I thought of a few things though:

- Would Vegas 13 handle timeline playback of large files better?
- In the task manager I can see that during playback the cpu is pretty much working at full power 80-100%, that remains the same when I turn GPU acceleration on, does that mean this setting is only for rendering and not for preview?

I guess the CPU is a bottleneck in this, unless a better graphics card can help with the previewing?

I guess the CPU is a bottleneck in this, unless a better graphics card can help with the previewing?

A better graphic card will help but the CPU will be a bottleneck very fast. If you don't want a full hardware upgrade, proxies is the only way to go. By the way, where are your source files located? A fast hard drive is important too, USB and eSata are not sufficient for 4K playback.

I believe Sony has a guideline on minimum hardware requirement for 4K editing; I only remember that 8-core CPU is recommended.

Interesting. Even USB2 can transfer 30MB/sec, which is 240mbps.
What bitrate is used on your GH4? I think 100mbps (or max 200, when all-I frames, but this is not so good quality)

And what about USB3 or e-Sata?...
Vegas is really far away from Edius for example when we talk about preview playback performance :-(((

See #9 I just added to my list in my post above, and the old thread that made me think of it. There's a chance "power" is being wasted on buffering video unnecessarily because it's visible on the timeline. I haven't noticed this myself, but I recalled that old thread, and DSE knows what he's talking about.

The dude, maybe you should try overclocking your CPU.

As for GPU, in my system (Intel i7-5960X (overclocked), AMD HD6970 & NVIDIA GTX 580) I just leave acceleration off in Vegas now and I'm getting 29.97 fps at Full (best) if there are no FX etc.. The whole GPU thing is beyond confusing. However I might still swap one out for an R9 290X as the price drops.

Part of the problem for me is that I don't trust rendering when GPU acceleration is turned on in the Video Preferences, and I don't trust myself to remember to turn it off before I render.

I create segments for PBS with a GH4 in the UHD 30fps mode. I have a fairly robust computer but not a monster. I have been a long time Vegas user but lately have been using Resolve more and more. I have tried many combinations to get smooth play back starting with the assumption that the MP4 or Mov file from the GH4 is very rough on processors. I have made proxies in ClipToolz, changed my original files to Cineform (in the GOPRO Studio strangely only the 1st MP4 camera choice works), made DNxHR files and ProRes in ClipToolz (now free BTW)
I have had the best results grabbing my original files with Catalyst Prepare renaming, setting quick in out points and placing on a storyboard but transcoding as individual files XAVC. I do not mess with the color in prepare as I believe Resolve to do a better job.
I chose XAVC because it is a robust enough codec for my purpose, trancodes faster than Cineform or DNxHR (note the R) and will give relatively smooth playback in Vegas, Premiere and Resolve.
Here's what is somewhat problematic: The XAVC files have 8 channels of audio (though only two show up in Vegas) I have to adjust clip properties importing into Resolve, by making 8 channels the default I believe it adds to the transcode time.
Catalyst Prepare is new and like all new software prone to crashing. I like the ease if reviewing footage and making in out selections before the transcode as well as the renaming feature, the transcoding itself takes less time than Cineform, ProRes or DNxHR. This is after testing Cineform Studio Premium, Cliptoolz , Prelude and Adobe Media encoder. Although we broadcast in 1080 I want to keep the UHD size until the final render to take advantage of Resolve's stabilization, cropping, sharpening tools. It round trips to Vegas (which I use to correct audio a feature Resolve will be adding next month) very nicely using the Final Cut import/export options in Vegas and Resolve.
Should this method still not work for your system Wayne at ClipTools has a proxy preset to make DNxHD's that work for me at 50fps.
I don't know it all so comments would be appreciated.

Hi all,

My files were on an external USB3 harddisk for storage first, but I transferred them to the internal SSD EVO 840 drive. This improved playback a little bit, but it is still not really fluent. I did also try the zooming in on the timeline and that is also helping a bit to a level that I can decently edit a movie and check what I'm doing to a certain level.

Since CPU is almost fully working during playback, unless there is a way to use my CPU in a better way (more cores or something) I'll have to get an upgrade..

Marcel

The Dude

Is your CPU the 2600 or 2600K? The 2600K is the unlocked version that can easily be overclocked.

Hi there,

In system info it says 2600 without the K....or wouldn't it turn up there?

Marcel

I can't remember if it did on mine but if you enter the motherboards bios it would certainly show it. The 2600K was running at 4.2GHz which is a significant performance increase over stock. You might want to consider getting a 2600K or better off eBay.

try cpu-z

If you have a 2600 it will almost certainly be assembled with the stock heat sink.

Have a 2600K which runs will run at 4.8G hz but throttled it back to 4.3GHz. If you have a stock heat sink make sure you upgrade that whilst changing the CPU For general work the 2600K will function at 4.3 GHz with the stock heat sink but will overheat very quickly when you come to render. You don't really want to dismantle the pc twice.
Take care!!