[JoshDi]

I am having a similar issue on my Windows 7 x64 machine running Kodi x64 KodiSetup-20180408-ff02b71b-master-x64.exe. This seems to happen only with content that is 720i or 720p - 1080p or 1080i content runs fine.

If I turn off "Sync playback to display" the issue goes away. This issue has been present since Alpha1 for me, but I have not had an issue with my initial v18 or previous versions (<v17) of Kodi. 

If I pause the video, as you can see in the sample video below, the video continues to play at the wrong speed. 

Any ideas? 

Sample Video of Issue: Sample Playback mp4Debug Log: https://pastebin.com/uUYC59AY

If I turn back on "Sync playback to display" and turn off DXVA2, all content plays as expected. If I turn on DXVA2, content that is less than 1080p has the issue in my OP above.