Patch list:

• use_xsel is a patch that reduces the latency of clipboard transactions, making it smoother while properly managing the memory.
  xsel has been around since 2001, and it's stable and has less dependencies than xclip, not to mentionn the compelling group of devs.

how to use:

download the patch file to the base directory of mpvacious, which may be ~/.config/mpv/scripts/sub2srs/
and run the following command:

$ patch -p1 < use_xsel.patch