[mythtv-users] problems with live TV (at program boundary)

Yuri Shirman yshirman at gmail.com
Fri Jan 7 05:43:00 UTC 2011


I have not found a solution except to stay with Mythdora/Fedora 12.
I have upgraded to MythTV 0.24 -- no problem there.

But whenever I install distributions newer than Fedora 12 I get kicked out of 
LiveTV into the menu with an error message every single time the program 
ends/starts. The distributions I tried are Fedora 13, 14 as well as 
Mythbuntu/Ubuntu 10.10; I may have also tried Ubuntu 10.04 but I do not 
remember anymore. 

To be complete, my configuration is a laptop with Core Duo T2600 cpu and 2MB 
memory. Firewire comes in through VIA pcmcia card. The input is provided by 
Motorola DCH-3416.

Yuri

On Thursday, January 06, 2011 07:47:01 pm Cal Collins wrote:
> Yuri (or anyone else),
> 
> I am having the same problem you reported -  at the end of every program in
> LiveTV I get 'Error opening switch program buffer' and mythtv quits from
> livetv back to the main menu. Did you ever find a resolution? Is anyone
> else experiencing this problem?
> 
> I had not had this problem until upgrading to 0.24 (mythbuntu 10.10) a few
> weeks ago (actually I had to do a full reinstall then restore the
> database). The input is firewire from a motorola DCX-3200. Frontend and
> backend are same machine, a PowerSpec V100 Celeron ® D Processor 356, 3.33
> GHz and 2GB RAM.
> 
> The only other reference I found to this problem is here, but it doesn't
> really provide an answer:
> http://www.gossamer-threads.com/lists/mythtv/commits/416842
> 
> My mythbackend log is very similar to yours. The mythfrontend log is as
> follows:
> 
> 2011-01-06 22:00:02.758 ALSA, Error: WriteAudio: buffer underrun
> 2011-01-06 22:00:03.772 Player(0), Warning: Waited 100ms for decoder to
> pause
> 2011-01-06 22:00:03.872 Player(0), Warning: Waited 100ms for decoder to
> pause
> 2011-01-06 22:00:03.923 [ac3 @ 0x7fc557f345e0]incomplete frame
> 2011-01-06 22:00:06.068
> RingBuf(/media/mythtv/recordings/7621_20110106220000.mpg
> ) Error: OpenFile(): File too small (0B).
> 2011-01-06 22:00:06.068 Player(0), Error: SwitchToProgram's OpenFile failed
> (car
> d type: FIREWIRE).
> 2011-01-06 22:00:06.069
> LiveTVChain has 2 entries
> * FIREWIRE: 7621 (21:32:24 to 22:00:01) discontinuous
>   FIREWIRE: 7621 (22:00:00 to 23:00:00)
> 
> 2011-01-06 22:00:06.123 Player(0), Error: Unknown recorder error, exiting
> decode
> r
> 2011-01-06 22:00:06.377 TV: Attempting to change from WatchingLiveTV to
> None 2011-01-06 22:00:06.882 Trying 1360x768 0.000 Hz
> 2011-01-06 22:00:06.888 SwitchToGUI: Switched to 1360x768 0.000 Hz
> 2011-01-06 22:00:07.326 TV: Changing from WatchingLiveTV to None
> 2011-01-06 22:00:07.369 TV: Attempting to change from None to None
> 2011-01-06 22:00:07.420 TV: Attempting to change from None to
> WatchingLiveTV 2011-01-06 22:00:07.421 MythCoreContext: Connecting to
> backend server: 192.168.2
> .160:6543 (try 1 of 1)
> 2011-01-06 22:00:07.422 Using protocol version 63
> 2011-01-06 22:00:07.470 Spawning LiveTV Recorder -- begin
> 2011-01-06 22:00:07.603 Spawning LiveTV Recorder -- end
> 2011-01-06 22:00:07.612 We have a
> playbackURL(/media/mythtv/recordings/7621_2011
> 0106220007.mpg) & cardtype(DUMMY)
> 2011-01-06 22:00:07.612 We have a RingBuffer
> 2011-01-06 22:00:07.614 playCtx, Error: Attempting to setup a player, but
> it already exists.
> 2011-01-06 22:00:07.614 TV Error: LiveTV not successfully started
> 
> 
> 
> Thanks,
> Cal
> 
> 
> 
>   12. problems with live TV (at program boundary) (Yuri Shirman)
> 
> > ------------------------------
> > 
> > Message: 12
> > Date: Fri, 24 Sep 2010 18:19:35 -0700
> > From: Yuri Shirman <yshirman at gmail.com>
> > Subject: [mythtv-users] problems with live TV (at program boundary)
> > To: mythtv-users at mythtv.org
> > Message-ID: <201009241819.35678.yshirman at gmail.com>
> > Content-Type: Text/Plain;  charset="us-ascii"
> > 
> > Hi,
> > I am running mythtv with backend and frontend on the same machine using
> > firewire input. Everything works great except for a weird problem with
> > Live TV
> > when a TV program ends. Myth attempts to switch to the following program
> > on the same channel and then quits. The frontend gives me "Error opening
> > switch
> > program buffer". In the meantime, mythbackend creates two mpg files in
> > the recorinds directory however, the file sizes remain zero.
> > 
> > In the log I see messages like
> > 2010-09-24 00:00:06.416 LFireDev(001E5AFFFEACA5D5), Warning: No Input in
> > 1050
> > msec...
> > 2010-09-24 00:00:06.441 LFireDev(001E5AFFFEACA5D5): ResetBus() -- begin
> > 2010-09-24 00:00:06.495 LFireDev(001E5AFFFEACA5D5): ResetBus() -- end
> > 2010-09-24 00:00:06.525 LFireDev(001E5AFFFEACA5D5): SignalReset(6->7)
> > 2010-09-24 00:00:06.559 LFireDev(001E5AFFFEACA5D5): SignalReset(6->7):
> > Updating device \
> > list -- begin
> > 2010-09-24 00:00:07.269 LFireDev(001E5AFFFEACA5D5): SignalReset(6->7):
> > Updating device \
> > list -- end
> > 
> > But also messages to the effect that "external tuner program exited with
> > no errors" (in attempts to fix it I tried used firewire priming scripts
> > to change
> > the program).
> > 
> > If, instead, the next program is scheduled for recording (instead of me
> > simply
> > watching it as live TV), mythbackend switches without any problem and
> > allows
> > me to continue watching.
> > 
> > Any help with fixing this would be appreciated.
> > 
> > Thanks,
> > Yuri
> > 
> > 
> > 
> > _______________________________________________
> > mythtv-users mailing list
> > mythtv-users at mythtv.org
> > http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
> > 
> > End of mythtv-users Digest, Vol 90, Issue 89
> > ********************************************
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