Help to test A/V sync issues

Hi!

I'm trying yo backport one commit for kodi 17 to the current build.
Fix A/V sync issues in Kodi on Amlogic-based devices by codesnake · Pull Request #863 · LibreELEC/LibreELEC.tv · GitHub

But I don't know why my patch fail

I'm using as I see in the wiki, the following diff

$ diff -Naur kodi-16.1-c327c53.orig kodi-16.1-c327c53 > ../packages/mediacenter/kodi/patches/kodi-999.99-aml-Drop-frames-if-requested-by-VideoPlayer.patch

But I get the following error

patching file xbmc/cores/dvdplayer/DVDCodecs/Video/DVDVideoCodecAmlogic.h
Hunk #1 FAILED at 68.

I don't understand why this error happend.

Can any one review my patch?

Quote from lrusak

Kodi 17 and kodi 16 are drastically different. I wouldn't waste your time.

So there is no benefit on implement void CDVDVideoCodecAmlogic::SetDropState(bool bDrop)?