[mythtv-users] Snow on analog stations

[Harry Devine]

Harry Devine wrote:
> Harry Devine wrote:
>> I just rebuilt my box due to some hardware issues.  I'm running 
>> Mythbuntu 9.04 64-bit.  Any recordings that I make using the DVB 
>> portion of my pcHDTV 5500 card work fine (recordings or live TV), but 
>> the analog stations all come in as white or green snow.  I had this 
>> problem about a year ago when I was trying to put the nVidia 177.82 
>> drivers on.
>>
>> At that time, the problem ended up being corrected by checking "Open 
>> DVB on demand" in mythtv-setup.  I just tried this and it had no 
>> effect.  I have version 180.44 of nVidia that came with the Mythbuntu 
>> installation.  Any ideas on what I need to do to get this back to 
>> working?  Upgrade the nVidia drivers perhaps?
>>
>> Thanks,
>> Harry
>>
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>>
> Scratch that!  2 minutes after I hit "Send", I found a setting on the 
> "Recording Options" of the DVB card labeled "Use DVB card for Active 
> EIT scan".  The description for it says "With this option enabled the 
> DVB card is constantly in use".  I unchecked that and checked the 
> "Open DVB on demand" and the analog stations tune nicely now.
>
> Sorry for the noise.  Hopefully this "noise" will help someone else 
> though. ;-)
>
> Harry
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>
Oops, looks like I spoke too soon.  I had 2 recordings that I made 
between last night and this afternoon that were nothing but green snow.  
When I just tried to tune those stations using Live TV, I get the same 
thing.  They come in fine if I plug the cable directly to the TV.  
What's weird is that I can tune some analog stations, namely the local 
major affiliates like ABC and Fox.  But others like FX or ESPN come in 
as green snow.

When I try to tune one of those stations, I notice that I see the 
following in the frontend log:

NVP::AddAudioData():p1: Audio buffer overflow, audio data lost!

And the backend log shows:
2009-08-14 20:48:44.986 NVR(/dev/video0): Unknown video codec.  Please 
go into the TV Settings, Recording Profiles and setup the four 'Software 
Encoders' profiles.  Assuming RTjpeg for now.
2009-08-14 20:48:44.990 NVR(/dev/video0) Error: Unknown audio codec
2009-08-14 20:48:45.001 AutoExpire: CalcParams(): Max required Free 
Space: 2.0 GB w/freq: 15 min
2009-08-14 20:48:46.612 NVR(/dev/video0) Error: DQBUF ioctl failed.
                        eno: Input/output error (5)
2009-08-14 20:48:46.635 NVR(/dev/video0) Error: Resetting and re-queueing
2009-08-14 20:48:47.500 NVR(/dev/video0) Error: DQBUF ioctl failed.
                        eno: Input/output error (5)


Any ideas on what's going on?

Harry