[mythtv-users] Lengthy delay watching recordings

[Rich West]

I noticed that going to 0.25 about a month back that the delay to start
playing an HD video had increased substantially and was curious as to
what might be the cause.

As I looked further, I realized that it is with all video, but HD
content appears to be the most obvious offender.  It can take up to 31
seconds from the moment the user selects the video to play before it
actually starts playing.

My backend system is well used, but from the graphs I have, it's not
hurting with CPU or memory.  Network to the frontends are all hardwired
(backend is gig, frontends are 100 meg).  From a utilization
perspective, the drives on the backend server are always hovering at
around 85% utilization, which is good, and the general I/O on the drives
is not such that it would cause a negative impact.

I am using commercial detection, so I do suspect that there is some form
of buffering going on, but for 31 seconds?  No network errors on the
switch or the interface for the frontend or the backend.    CPU
utilization on the frontend is low.. basically idle.

I'm just wondering if there is a particular place within MythTV to look
(for example, I recently found that it was recommended that "quick
tuning" should be enabled for the hdhomerun)..

Thanks!
-Rich