I am not sure what has happened because it used to play them fine. But somewhere along the way an update has happened and now it struggles to play 1080p H264 videos. This one for example stutters. But the CPU load is not excessive nor is the Memory exhausted so what happened?
Was there some update to OSMC recently that might have affected. Or was it the switch to Kodi 17 that is causing issues now?
Did you try to play them from the SD card to exclude network or USB as the issue
Yes, First via the Emby server. Then by a direct URL, finally by downloading it and trying to play it as a file. All exhibit the same stutter where the audio will continue but the video will freeze and then suddenly catch up or just remain frozen.
Provide debug enabled logs if you need help
A snippet of the log is here this is playing the file locally off a USB drive.
Also, snippets are not sufficient, we need complete debug enabled logs.
Well then you better allow multi megabyte uploads to your pastebin server then. Because it is connected to a Emby server with a couple of terrabytes of media on it which will fill the logs with lots of stuff that is irrelevant to this query.
The log posted was from when I enabled debug logging and navigated back to the saved file to play it.