[mythtv] 0.18 Choppy audio and video on some uk freeview dvbchannels

[Peter]

On 4/18/05, Taylor Jacob <rtjacob at earthlink.net> wrote:
> OK Everyone who is finding this problem please do the following:
> 
> 1. Change to TS mode.. I refuse to support PS mode anymore.. It already has
> known issues with getting lost on AC3 streams when the signal glitches..
> 
> 2. Comment out the av_remove_stream() code in
> libs/libmythtv/avformatdecoder.cpp.. This is most likely the source of the
> audio going silent in livetv..
> 
> 3. Tell me if you continue to see this problem.. So far 1/1 people have had
> success with this fix..
> 
> If the previous recordings are PS recordings there is nothing I can do to fix
> it.. I think Jespers Multiple langues for PS mode are causing some of the
> issues if you are in PS mode, since thats really the only thing that has
> changed since .17 that would make ANY sense at all..
> 
> Commenting otu teh av_remove_stream code in avformatdecoder might still result
> in channels coming up silent but you should be able to get audio back by using
> the +/- keys..
> 
> Taylor
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> 

Ok, I've been trying this. I'm now using TS mode, HW decode (set in
mythtvsetup to work around issues I've seen mentioned relating to
XVMC_VLD) and have commented out the 1 line in avformatdecoder that
mentions av_remove_stream.

I'm testing it by watching live tv and changing to another DVB channel
which isn't broadcasting at that time (I'm in the UK, so tuning to
BBC3 during the day, or trying to tune to CBBC during the evening).
Obviously the tuning to that channel fails, but then livetv tries to
re-tune the original channel. At that point I then lose audio (picture
is ok). Exiting livetv and re-entering all is ok again. Using +/-
doesn't make any difference at this point either.

Since this shares the same audio PID it sounds like the issue being
discussed here but maybe its different (with similar symptoms). Or
maybe I haven't edited avformatdecoder properly.

Thanks
Peter