Without any understanding of your editing process, it's really hard to make any suggestions at all. How did you make the sequence? What are you exporting as? Did you apply any effects or modify the footage in any way? If so, what did you do? It also helps to post your computer/OS/versions and drivers details in case something odd is there. Overall, seems an odd issue for sure, I've never experienced it so I would imagine just a simple user error hopefully
Thank you for your answer.
The original drone footage is:
3840x2160 - 23.98/s
.MP4 - HEVC 10 bit 4:2:0
I have do color changes, that's it.
The sequence is 1920x1080 - 29.97/s (because of all the other footages in 30 and 60/s
OS: Windows 10
GTX1080 - 8Go
Your video card is not up to the action I think. As suggested below, try switching to Mercury Engine Software Encoding. It'll be slower (maybe), but at least it might work.
Try switching to software encoding.
That does seem to work for me! Thanks!
It was the other guy that had shared his video card.
I expected mine to be good enough too, but seemingly it's not.
I had my videodrivers updated, but they seemed to be in Game Driver stance.
I changed that to Studio Driver stance and it worked way better.
Sadly still have to use Encoder to export not-shocky, but can at least edit with more fps.