Question Ryzen 7 1700 Under performing?

w.cattermoul

Reputable
Nov 1, 2018
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Last year i bought a Ryzen 7 1700, which has done every task i have thrown at it with extreme ease, but recently i have been getting into video editing. Iam using a very light video editor, OpenShot. But when i get to around 5 minutes of footage, even splitting a clip takes about 30 seconds to do. and this is with 720p footage (even at 480p its still slow). My specs are: Ryzen 7 1700 (Stock), 12GB DDR3 2666mhz RAM, Radeon R7 370 ASUS Strix GPU, Kingston 240GB SSD (where the footage is located)
I dont understand as all the reviews say this CPU was amazing for heavy video editing, but even at 480p my footage slows to a halt.
Thanks for any help