[mythtv-users] question regarding composite vs. television inputs

[Michael J. Sherman]

Dane Kantner wrote:

>>I'm just throwing this out here to see if anyone else has this issue.  I
>>have my video input *only* on the composite input on my TV tuner card;
>>The coax input is unused (AT TV Wonder VE).  I setup myth correctly, and
>>most of the time it works properly.  However, I've noticed that about
>>1/10th of the recordings for some reason try to use the coax input, so
>>all I get is the green screen with some static for the duration of the
>>recording.  It really does seem to be random, and I'm guessing about a 1
>>in 10 chance of this happening to my recordings.  It's a shame 'cause
>>it's like I'm playing Russian Roulette and I never know if the one show
>>I *really* need to be recorded will just be blank when I get home.
> 
> 
> if the RF input never gets used, and its causing problems, perhaps you can
> disable it with the driver itself... also, have you ensured that in setup
> you don't have a cable provider input setup on the that input?  If so, maybe
> a glance at the database tables would ensure there isn't any old input data
> laying around for this.... (Alternatively, some might say to just drop your
> db).
> 

I'm sure I have nothing in the DB using that input. In fact I removed it 
from the sources table so I cannot even select it by pressing "C" when 
watching live TV.  And it's random.  It's not like it's just one 
particular channel that has this issue; then I might deduce a problem 
with a stray setting.  But on a single channel most of the time it'll 
work properly and record off of composite, but sometimes try to record 
off of coax.  It'll change the channel fine (using the external channel 
change routine), and so the audio will record perfectly, but I get the 
dreaded green screen for video.  And this is *not* reproducable in a 
deterministic manner; that's what's odd.  Most of the time it'll work 
just fine.