Very choppy video output and short video

[Daisy.Aw]

I've been using OBS to record speedpaints for a couple of years now, and all of a sudden the files are way shorter than the time I recorded. I'm using a 6-year-old windows 7 laptop, but I haven't had issues without outputs in the past.

Here is one of the recent logs: https://obsproject.com/logs/zDMMzxLotNEQUYOC