Hi Jaewoo,
In the above config, SubFrameRC needs to disable when we encoding fixed Qp.
Please change the following parameter.
static_param41 = 0 # RCParams ::SubFrameRC
dynamic_param42 = 0 # RCParams ::SubFrameRC
Regarding using more than 4 DSPs, Please try giving multiple of 8 for number of core.
$CODEC_PARAMS -t "0 1 2 3 4 5 6 7....30 31 32 33 34 35 36 37 38 39"
Thanks & Regards
Kuladeepak