adb screenrecord size option not working as expected

[stella1016king]

It's noticed that 'adb screenrecord --size RESOLUTION' not working as expected. It always takes the physical resolution instead of the given resolution. Is this a bug from device or adb?
Example:
run 'adb shell wm size'
Physical size: 1440x2960
Override size: 1080x2220

Then run:
'adb shell screenrecord /sdcard/demo.mp4 --size 1080x2220'

->
The recorded video has 1440x2960 resolution, and the captured screen is 1080x2220. I expect the video itself has 1080x2220 resolution, then the video could look like 'full screen'.

Whether this is a known issue or I understand it incorrectly?

 

[ocnbrze]

Is this a development question?

 

[stella1016king]

Is this a development question?

I am new to the forum. Here it seems device related forum. If there is bug in adb, does it mean “dev question”? Never mind, if unrelated, please ignore or remove. Sorry for the inconvenience.