[mythtv] Some ATSC channels displayed "choppy", but only on LiveTV

[Jack Perveiler]

I have a few ATSC channels (on my PCHDTV-3000) that act erratically when I
change to them in LiveTV in r7413.  Various frames from the feed look just fine
(no pixelation or other wierdness)... the problem is that I get tons of
prebuffering pauses and audio buffer underruns (it looks more like a muted
slide show than video).

When then backend changes to these channels on its own for scheduled recordings
it does just fine (that is, the recordings it makes play back fine). 
Additionally, if I change to the funky channel (which causes it to do the
choppiness), then exit LiveTV and return (it starts up at the last channel I
was tuned to, the choppy one) it also plays back fine.

I noticed I get this message in my backend log when I change to the channel in
question:

2005-10-15 22:19:15.133 DVB#0 DVB SI Table Parser Started
2005-10-15 22:19:15.375 DVB#0 Rec: WARNING - Got data from card after 500 ms.
2005-10-15 22:19:15.396 DVB#0 Data read from DMX - This is for debugging with
transform.c
2005-10-15 22:19:27.494 Could not find channel -1_-1 in TVCT
2005-10-15 22:19:27.592 
VCT Terra: channels(3) tsid(0x551) seclength(143)
Channel #0 name(WCVB-DT) 5-1 mod(ATSC 8-VSB) cTSID(0x551)
 pnum(3) ETM_loc(0) access_ctrl(0) hidden(0) hide_guide(1) service_type(2)
source_id(1)
 descriptors length(17) count(1)
     Service Location Descriptor (0xa1) length(15)

Channel #1 name(WCVB-DT) 5-2 mod(ATSC 8-VSB) cTSID(0x551)
 pnum(4) ETM_loc(1) access_ctrl(0) hidden(0) hide_guide(1) service_type(2)
source_id(2)
 descriptors length(17) count(1)
     Service Location Descriptor (0xa1) length(15)

Channel #2 name(WCVB-TV) 5-0 mod(Analog) cTSID(0x550)
 pnum(65535) ETM_loc(0) access_ctrl(0) hidden(0) hide_guide(1) service_type(1)
source_id(3)

That's with the just the default verbosity.

This problem has been with me since at least r7386, but I didn't want to
mention it until I had a chance to try it with newer SVN.  Now that I have, it
still doesn't work.  I don't know if this is relevant, but it seems the
channels with problems are all 720p.

Any ideas/suggestions?  Is this ticket-worthy, or am I just doing something
wrong?

Thanks,

--Jack



	
		
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