[DaveBlake]

But if you just play the video file from start to end would you expect to typically get a "CMMALVideo::GetPicture - called but m_output_ready is empty" error?
If so, then it's worth getting me a file and I'll see if I can reproduce.

I have no idea, never had any stutter in v15 (was the family version), video was always perfect so never had to debug video before. I'll test tonight, video debug on and PPL adjust disabled, and provide the file I play if there is an issue.