[mythtv] 0.28 Release Schedule

[David A. De Graaf]

On Mon, Jan 25, 2016 at 02:34:56PM -0600, James Meyer wrote:
> > 
> > Any idea if there is still sufficient test coverage of LiveTV using
> > Hauppauge PVR-xx0 cards (baseband video input, not tuner)? LiveTV on
> > 0.27.5 is unusable for me with a PVR-150 card - but I see no issues
> > whatsoever with DVB, or with recordings from the PVR-150.
> > 
> > With the delay added to the release schedule I will try to put
> > together another test box (separate to MBE) with another PVR-x50 card
> > for more testing, but I'd love to hear from developers/users who use
> > and test this combination of card/Live TV and do not experience any
> > issues.
> > 
> > Cheers,
> > Nick
> > _______________________________________________
> 
> Hi Nick,
> 
> I have been testing live tv with the tuners on pvr-500.
> The behavior  is very much like .27.  Channel changes work but roughly 10% of 
> the time a channel change will result in a black screen.  The only way to get 
> out of this state is to kill the frontend  or changing video sources(if the 
> menus still work).   Attempting to go back to the main menu will result in a 
> complete lockup of mythfrontend.
> 
> -james
> _______________________________________________

I believe that the Hauppauge PVR 150 is incapable of playing back
while recording without a slight delay interposed.

My Fedora 23 mythtv machine has three PCI TV receivers:
  - pcHDTV HD3000        for broadcast digital TV
  - Hauppauge HVR-1250   for cable digital TV
  - Hauppauge PVR 150    for cable analog TV

LiveTV works perfectly with the first two digital TV receivers
but the PVR 150 displays gross pixelation after seconds of watching.
I found that choosing one channel (unwatchable) and then switching
to an adjacent channel would yield a watchable picture for maybe 
a minute, but then devolve into the unwatchable pixelated picture.
As James reported, this can even lead to system lockup.

Recordings with the PVR 150 are perfectly fine, so I chalked this up
to just another unsolved mystery.

Eventually, I was watching a recorded PVR 150 program while it was
being recorded, and skipped forward over some commercials and caught
up with the real-time recording.  Whoops!  The pixelation began
*on a recorded* show.  That upset my theory.

I went over to LiveTV, started watching a PVR 150 channel with the 
usual poor picture.  I pressed <P> to pause, and again to resume.
The picture was PERFECT.  Eureka.  (almost)LiveTV is possible again.
Only a few seconds of delay is all that's needed.

I hope this long-winded explanation of my observations might give
insight to those more knowledgeable who might fix it.  An obvious
fix would be to surreptitiously insert a delay when starting a 
PVR 150 LiveTV session, but that could be undone by unwise forward
skips.  I'm sure there's a better solution...

-- 
        David A. De Graaf    DATIX, Inc.    Hendersonville, NC
        dad at datix.us         www.datix.us


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