[kolak]

Getting buffer underflow errors when encoding CBR with x265 using strict-cbr. Is it a known issue?
Another issue could be fact that I'm forcing I frames with ffmpeg's -force_key_frames "expr:eq(mod(n,50),0)" This may be messing with rate control.
Is there any other way of getting fixed 2 seconds IDR frame distance (and still letting encoder to use I frames inside those 2 seconds)? Using latest ffmpeg.