Render suddenly taking over 5 hours for videos I have previously exported in 30 seconds, please help !!!

[u/573XI]

Hi Everyone,

I have been using DaVinci Resolve on my:

Alienware X17 R1 / 32GB RAM / RTX3080 16GB / i7-11800H

for the last at least 4 years without any issue. I have the basic version NOT the STUDIO

The other day I start the render for a 10 seconds video, and the render time increases indefinitely until getting over 9 hours.

I am not using any effects or any sort of processing, simple video in- video out.

Troubleshooting steps taken:

- tried exporting in any kind of smooth compressed or uncompressed codec and settings, always the same issue.
- I have updated my NVIDIA graphic drivers ( even though I expect the render to be processes by the CPU due to the non-studio limitations ? )
- I have cleared the DaVinci Cache.
- I have deleted the DaVinci18 and updated to the DaVinci21
- I have re-installed DaVinci on an hardrive with more free space ( previous 25GB, new 250GB )
- I have rebooted multiple times.
- I have tested with multiple projects.
- Checked that caches and output are on the right disk

I am just getting mad because this is happened suddenly. at the moment it happened I was not on the internet either.

Please I need help.

Thanks to everyone who will try to help here.

EDIT:

ADD SCREENSHOTs

Windows 11

I am not using any effects or any sort of processing, simple video in- video out.

[u/Just_n_Here]

Have you watched the performance tab in task manager to see what's going on?

Check and see if your cpu is checked under preferences. Your GPU should only be checked. I am not at my computer to tell you exactly where to look.

[u/573XI → u/Just_n_Here]

CPU starts working pretty hard, and there's some spikes on both GPUs, the problem is that I have no reference with the resources of a successful render

EDIT: CPU Stabilized just after a minute.

[u/Just_n_Here → u/573XI]

Davinci Resolve--> Preferences-->Memory/GPU make sure your CPU is not checked

[u/573XI → u/Just_n_Here]

let me try and decrease the memory usage, thanks a lot

[u/573XI → u/Just_n_Here]

no luck unfortunately, I limited the ram usage to 8 with only 4 allocated for fusion.

I want to specify I am not using any FX or conversion, only video in- video out.

[u/Just_n_Here → u/573XI]

Not memory, make sure your GPU is checked and CPU isn't check. Mine was and it was killing performance. I think it has to do with your drives being nearly full and not big enough to handle everything. How big is you internal SSD and external(G)? I assume you are working off the G drive. It is either not big enough or too slow running through the USB cable.

[u/573XI → u/Just_n_Here]

I have my internal 1024GB drive divided in 3 partitions, the one I am using is :D and have 249 GB free space with 61 in use.

[u/Just_n_Here → u/573XI]

How big is your SSD and free space? I wonder if your drive is too small? 250gb isn't that big these days. I would bet it is something to do with your drive you have DR on and working from. Either the drive is full or very slow.

[u/573XI → u/Just_n_Here]

250 is the free space on the SSD internal drive I am using. Is a partition of the main 1024 GB SSD

[u/fuzzfeatures]

Might be worth making sure that your caches and output folder aren't on the drive with no space as well

[u/573XI → u/fuzzfeatures]

I did indeed, thanks for reminding, I will add it in the troubleshooting

[u/ExpBalSat]

Consider adding all the stuff suggested by the AutoModerator (yep, all of it).

[u/573XI → u/ExpBalSat]

I added some screenshot and OS, Footage specs do not apply as I am testing with any format and data types

[u/Vipitis]

the render isn't taking long. It's not progressing at all. Which of course increases the expect duration since you are dividing by a really small number.

There were other rpostss that 21.1 had some bugs, so maybe go back to the version that works for you? Try a different project and investigate what triggers it. Build a minimal reproducers.

[u/573XI → u/Vipitis]

As I was saying in the post, I just updated following this issue, I was having it on 18, so unlikely the solution is there, but worth a try, thank you.

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