Hi durgeshmn,
Please set the level in /etc/enctune.conf
H265:
Settings_1080P
IMinQP 5
IMaxQP 30
PMinQP 10
PMaxQP 51
VBR 1
QualityLevel high
level 41
The definition:
H265_LevelIdc_10 = 30,
H265_LevelIdc_20 = 60,
H265_LevelIdc_21 = 63,
H265_LevelIdc_30 = 90,
H265_LevelIdc_31 = 93,
H265_LevelIdc_40 = 120,
H265_LevelIdc_41 = 123,
H265_LevelIdc_50 = 150,
H265_LevelIdc_51 = 153,
H265_LevelIdc_52 = 156,
H265_LevelIdc_60 = 180,
H265_LevelIdc_61 = 183,
H265_LevelIdc_62 = 186,
H265_MainTier = 0,
H265_HighTier = 1,
The last bit is for setting main or high tier. For your case level 5.1 high tier, you should set level = (153<<1)+1 = 307