Hitfilm Express suddenly much slower to export
I've been using Hitfilm Express for a few months now. I have been recording mp4s from OBS, doing minimal editing and exporting as mp4 in HF Express. Previously the export would approximately take real time (e.g. a 10 minute video would take around 10 minutes to export).
Now all of a sudden it is taking over three times longer. A 22 minute video took about 90 minutes. Normally this would take around 22 minutes.
I have not changed any settings.
I have an AMD Ryzen 5 3600 6-core CPU and a Radeon RX570.
What could have caused this? Could an update to my video card driver be responsible?