No, you need to manually specify that, and the options are more limited, so I usually do CPU encoding unless I’m prioritizing encoding speed over quality for some reason. (And yes, I have verified it’s using the CPU by looking at the CPU usage while it’s encoding).
Is it possible you’re using your desktop’s GPU for ffmpeg encoding, and not the CPU, by chance?
No, you need to manually specify that, and the options are more limited, so I usually do CPU encoding unless I’m prioritizing encoding speed over quality for some reason. (And yes, I have verified it’s using the CPU by looking at the CPU usage while it’s encoding).