No Hardware Acceleration

I have the weirdest thing going on lately.

The same timline can be either exported in 50s or in 35minutes. Sometimes it's super fast and sometimes its super fast till it hits 20, 30 or 50%, then it gets super slow.

My CPU and GPU are not working hard. It's just working at a very slow pace, no component is at high temps.

Sometimes I go back to my timeline and deactivete/activate some clips, then it's super fast.
Proxy generation is also slow.

I use hardware acceleration and have enough disk space free.

If you don't have any GPU effects on a clip, GPU usage will be low. Example a Dnxhr file in, DnxHR out with just some curves.

Put a bunch of NR on it, do you see a large GPU usage?


If your source footage is H.265 4:2:2 you are going to have poor performance, you have no hardware to decode this. Confirm you have the GPU set to decode H.264/5, your F CPU lacks Quicksync (not an ideal choice).

The same timline can be either exported in 50s or in 35minutes.

Those times are a very good evidence that it's actually NOT the "same" timeline.

I mean, it could be a single timeline that you're talking about, but each time you export, something is different there. Effects, delivery settings, range of clips...something.

Whatever that difference is will be the explanation for the different export times.