This should work, I didn't try.
#set AV out 4:3 mode #1080p 30 writew 0xC05C2D08 0x0403
|Thread starter||Similar threads||Forum||Replies||Date|
|L||Decrease photo resolution to 640 X 480 in camera.||Yi Action Camera||0|
|R||streaming resolution?||Yi Action Camera||0|
|J||Timelapse with poor bad resolution quality||Yi Action Camera||1|
|G||Resolution ...||Yi Action Camera||0|
|Hacked FW 1.2.0 yet?||Yi Action Camera||5|