Extracting .dtb file from a running Android OS

Hello Guys, i’m facing an issue about a tv box with s922x, I’ve extracted the android dtb as commented above, but how can i convert to multidb format?

I tried to use the 256kb dtb exported from android, but it hasn’t booted the emuelec.

there is no root/dev/dtb in my rooted tvbox. Any other suggestions?

See DTB Images  |  Android Open Source Project

Try if it have another name: ls /dev/dt* if any hit