[mythtv-users] LiveTV glitches at program transitions (was Re: [mythtv] mythplayer.cpp query)

[Russell Gower]

On 14 Mar 2012, at 10:10, Terjesen Jens Peder wrote:

> 
> 2012-03-13 09:15:01.343816 I  Player(0): SwitchToProgram - start
> 
> <snip>
> 
> 2012-03-13 09:15:01.525242 N  SG(LiveTV): Unable to find storage group 'LiveTV', trying 'Default' group!
> 2012-03-13 09:15:01.530305 I  ProgramInfo(8441_20120313091500.mpg): GetPlaybackURL: File is local: '/mythtv/kvm02/Recordings/8441_20120313091500.mpg'
> 2012-03-13 09:15:01.530322 I  FileRingBuf(/mythtv/kvm02/Recordings/8441_20120313083045.mpg): OpenFile(/mythtv/kvm02/Recordings/8441_20120313091500.mpg, 10000 ms)
> 2012-03-13 09:15:01.535417 I  AO: OutputAudioLoop: audio paused
> 2012-03-13 09:15:05.544482 I  FileRingBuf(/mythtv/kvm02/Recordings/8441_20120313091500.mpg): OpenFile() made 346 attempts in 4014 ms
> 
> <snip>
> 
> 2012-03-13 09:15:05.610378 I  RingBuf(/mythtv/kvm02/Recordings/8441_20120313091500.mpg): safe_read(... at 0, 1048576) -> 349116, took 66 ms (42.3171Mbps)
> 
> <snip>
> 
> 2012-03-13 09:15:05.675579 I  RingBuf(/mythtv/kvm02/Recordings/8441_20120313091500.mpg): safe_read(... at 349116, 1048576) -> 0, took 60 ms (0Mbps)
> 
> <snip>
> 
> 2012-03-13 09:15:05.981138 I  RingBuf(/mythtv/kvm02/Recordings/8441_20120313091500.mpg): safe_read(... at 349116, 1048576) -> 0, took 301 ms (0Mbps)
> 2012-03-13 09:15:06.237066 I  RingBuf(/mythtv/kvm02/Recordings/8441_20120313091500.mpg): Waited 0.2 seconds for data

I've taken this to the user list as it doesn't appear to be a development issue at this stage.

After my last post I started digging into the OpenFile() 4014ms issue, as Jens said it appears than the backend is having storage issues, I'm going to setup a separate combinded BE/FE test system for further analysis.

At this stage I believe the "Waited 0.2 seconds for data" are due to the frontend reading to close to the end of the file, if playback is paused for a few seconds they go away.

Regards
  Russell