Stuttering and audio out of sync/no audio, in a specific scene in a 4K movie (Mi-Box, Kodi)

Question

So this is an interesting one.

I have a Mi-Box with ethernet adapter, and I watch 4K HDR movies (those 16-20 GB files, 10Bit) through a network share and it works great.

(Example: A.Quiet.Place.2018.2160p.UHD.BluRay.X265-IAMABLE)

Yesterday I watched a movie, and in a specific scene, the video started to stutter, the audio was out of sync or even stopped completely. (only the audio stopped)

After that scene, the movie will work fine. There would be some stutters later or before, but very minor, and it will just buffer for 2 seconds and it will be fixed.

The problem was in that specific scene. Like 4 straight minutes.

That is the movie:

Ready.Player.One.2018.2160p.UHD.BluRay.X265-DEFLATE

And the scene was SPOILER SPOILER SPOILER - in "the shining" scene, right when H openes the elavator door and the blood comes out.

Using the latest Mi-Box update, latest stable Kodi.

I've tried to switch the audio from 7.1 to AC3 5.1

The movie works fine on my computer for that matter.

Thanks for reading.

FaberfoX · Accepted Answer

My guess is that during that scene the bitrate gets too high for the MiBox/Kodi to handle. Try playing that on the PC with Task Manager open and see if the CPU, Disk or network bandwidth spikes around it.