Thanks for sharing, but it is definitely a change in video playback between 7.0 and 7.1, even though release notes might not mention.
I guess development team knows what they did and can revert or solve it.
This particular issue is on our radar, and we’ve had a few reports with similar files.
The underlying problem is an encoding related issue with certain files that results in a jittery effect during playback. This effect can also be seen when playing the sample you sent in on Quicktime on Mac.
We have a few ideas for working around these issues, but these have not been implemented just yet.
@james yeah all files stutter for me and I tried a 4K HDR remux 60GB movie file and also stuttered but with MrMC no matter what file I threw at it, it never had a single stutter and was silky smooth with same files.