VQ, AQ Buffer problems in large MKV files

[sq9mcs]

Well it doesn't help.

Before highest flow ~30Mb/s, AQ buffer start going down from 99% to 16%, and the same is with VQ buffer. Then going down to 2-3 an try tu fill up, fps going to 5-6 and CPU have 100%. Sometimes the same situations is when flow will have 15-20Mb/s

Last lines in sysctl.conf:
# rpi tweaks
vm.swappiness=1
vm.min_free_kbytes = 16384