[mythtv-users] Weird distortion on recordings
Yan Seiner
yan at seiner.com
Tue Apr 3 14:33:34 UTC 2007
Patrick Wagstrom wrote:
>> I'm trying to track down some weird distortion on recordings. I've
>> posted a couple of examples and I hope someone can shed some light on
>> this:
>>
>> http://www.seiner.com/analog.jpg
>> http://www.seiner.com/digital.jpg
>>
>> This has been happening on my new backend - a 1.67 Ghz Core2 Duo. I
>> transplanted the tuners from my old PIII 1GHz box to this one, and
>> this started happening. Recordings on the old server were perfect;
>> here they distort like this.
>
> I had similar problems to what you're showing. Much more frequently
> on the digital than analog, however. For the analog tuner, I had to
> modify my IVTV driver in ivtv-driver.h to IVTV_ENC_PIO 1, which fixed
> the analog issues.
What kernel/ivtv version?
> For digital, I replaced the power supply, which fixed those issues.
Ooof... I hope not; this is a brand new box with a (supposedly) server
quality PS.... Doesn't mean it's not failing, though.
I am guessing that it's something downstream of the first splitter; the
signal going to the real TV shows none of the problems I am seeing with
Myth. I wish I had a real signal strength meter so I could test the
antenna signal....
Anyone know where I can get some diagnostic tools for TV reception? I
have a bt878 card I could stick in a box if it means that I could get an
accurate 'second opinion'....
--Yan
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