[mythtv] Problem tuning to channel after 6pm with 0.20

[Stuart Auchterlonie]

On Tue, Oct 03, 2006 at 09:12:37AM +0100, Simon Dyson wrote:
> Stuart Auchterlonie wrote:
> >Okay this is really odd. I've checked my recordings and I have
> >numerous recordings made between 6pm and 6am from ch4, all of
> >which work fine.
> >
> >There is nothing to my knowledge that Channel 4 have changed
> >in their broadcast paramaters. If there was you wouldn't be
> >able to receive it at *any* time, not just at a particular
> >time of day. So that leads me to believe it's something local
> >to your setup.
> >
> >Do you have a Set Top Box to verify ch4 is received correctly
> >in your house at this time?
> >
> >For those recordings you have that won't play could you get
> >a copy of the frontend output running with
> >--verbose channel,record,playback
> >
> >Also, have you tried rescanning the channels? If not, take
> >a database backup and rescan your channels.
> >
> >
> >Stuart
> >  
> Stuart,
> 
> Thanks for the advice. I don't have a set top box so I have no other way
> to verify that I can receive Channel 4.
> 
> I did rescan the channels when the problem first occurred after the
> upgrade but it didn't seem to help. I will give it another go tonight if 
> I get the chance.

If it didn't help then, i'm doubtful it'll work now, but it's worth
a try as there were significant fixes in the scanning code that went
in towards the end of 0.20 development.

> 
> I ran with the logging level you suggested and attached are two log
> files, one is the result of trying to watch a Ch4 recording, the other
> is the result of watching another recording that works fine. I made the
> 2 log files so I could compare them myself for differences (useful since
> both logs show some of the same errors so these are most likely red
> herrings). One error that caught my eye that only occurred for the ch4
> recording was:
> 
> 3: start_time: 6680.409 duration: -9223372036854.775
> 
> '3' seems to refer to the subtitles stream and apparently has a very
> large negative duration. AFAIK 0.19 did not support subtitles so this
> may be a clue as to why these recordings have stopped working since the
> upgrade. But let me know if I'm just barking up the wrong tree here.
> 

That's not the error, the problem is that the recording appears
to have 3 video streams. Myth cannot handle this situation, even
though there was a period during 0.20 development where it was
able to create them...