On Mon, 21 May 2018 18:16:37 -0400, neil wrote:

> When watching videos (YT or LAN-based MP4 files) on my RPi 3B+
> (Raspbian), there is a distinct delay of the audio, causing it to lag
> behind the video by as much as about 1 second.

Pictures early, that makes a change they are normally late.

There is a significant delay between a particular picture event
arriving at the TV on HDMI and that event appearing on the screen.
This delay is known by the TV and the sound is normally automatically
delayed to match.

Digital video/audio streams can get their timing knickers in a twist
and to un twist them may need a complete power down of everything.
I've even had the stereo swapped over not just an pictures/sound
event sync problem.

--
Cheers
Dave.

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