Bug Report Ffmpeg vaapi issue, low bitrate

[satont]

OS: Manjaro
Kernel: 4.14.71-1-MANJARO
Vainfo:

Spoiler

vainfo
vainfo: VA-API version: 1.2 (libva 2.2.0)
vainfo: Driver version: Mesa Gallium driver 18.2.1 for AMD CAPE VERDE (DRM 2.50.0, 4.14.71-1-MANJARO, LLVM 6.0.1)
vainfo: Supported profile and entrypoints
VAProfileMPEG2Simple : VAEntrypointVLD
VAProfileMPEG2Main : VAEntrypointVLD
VAProfileVC1Simple : VAEntrypointVLD
VAProfileVC1Main : VAEntrypointVLD
VAProfileVC1Advanced : VAEntrypointVLD
VAProfileH264ConstrainedBaseline: VAEntrypointVLD
VAProfileH264ConstrainedBaseline: VAEntrypointEncSlice
VAProfileH264Main : VAEntrypointVLD
VAProfileH264Main : VAEntrypointEncSlice
VAProfileH264High : VAEntrypointVLD
VAProfileH264High : VAEntrypointEncSlice
VAProfileNone : VAEntrypointVideoProc

OBS version: aur obs-studio-git 21.0.2.r0.g6ed55995-1
Issue: i have less then 100kb/s bitrate