X9 Slow Rendering

[dbsanders]

If I were Corel, I would hate this question. Just because I know there are so many factors involved in performance. I am just having trouble seeing any bottleneck of CPU, memory, or I/O resources.

I am starting to work with 4K video (with 720x480 proxy), and rendering a 2-minute 4k video clip with added audio takes about 8 minutes. I have checked every "hardware acceleration" option I can find, and my storage is all SSD - very fast. During rendering/encoding (whatever the right term is), CPU chugs along at about 30-40%, and I am not sure my GPU is doing anything at all. Disk utilization is about 1%

CPU - Intel 4-core i7 4790K @ 4 GHz
GPU - nVidia GTX 750 Ti w/2GB VRAM - A bit old but not sure it's even being used by the software
8 GB RAM
Storage Multiple SSD storage, source and target video on different disks.

Encoding settings:
MPEG-4, 3840x2160 30 fps
H.264 video
384 kbps audio

I check "same as the project settings, since my source video format is the same as the desired final result. Smart Render is enabled, so I would think this would be fairly quick, not re-encoding everything.

nVidia video drivers are up to date.

What else can I check?

[asik1]

You can check mail, check the shopping list, take your dog for a stroll.
... and no Corel don't hate this Q, we have FF template maker you know...

[BrianCee]

that reply has gone completely over my head asik1 - can you explain how having the FastFlick template maker helps with rendering time - it makes project templates and is not involved in rendering at all


sorry dbsanders - I do not have any suggestions that will help you



...

[asik1]

that reply has gone completely over my head asik1 - can you explain how having the FastFlick template maker helps with rendering time - it makes project templates and is not involved in rendering at all
sorry dbsanders - I do not have any suggestions that will help you
...

dbsanders is worried that Corel will hate his Q, I reassured him it isn't the case as Corel decides to spend ~100 man hours on FF template maker as it's much more important and widely needed than rendering engine.

[aljimenez]

About the only thing I could see is you are a bit low on memory: 8GB is on the low side. On the other hand, the rendering times you are seeing don't seem much different than what I see. To get the best rendering times, I make sure to have no other program running; in particular don't have any browsers running nor minimized. Sometimes Windows is downloading stuff in the background. Windows has so many things constantly using the cpu that it is so difficult to have consistent and fast running times of any one program we want to run fast.

[dbsanders]

Thanks everyone. Maybe my expectations are too high. I may try adding RAM to see if that improves things.

[lata]

I check "same as the project settings, since my source video format is the same as the desired final result. ....................
What else can I check?

Can you try Same as First Clip, assuming your 4K is the first clip.

Does that improve render times?

[dbsanders]

I check "same as the project settings, since my source video format is the same as the desired final result. ....................
What else can I check?

Can you try Same as First Clip, assuming your 4K is the first clip.

Does that improve render times?

In the test I am doing, there is only one clip

[asik1]

wmv's take ~90% of the cpu, unfortunately I wasn't able to get a proper useful 4K profile yet.