[mythtv-users] Trying to use HDTV as a firewire recorder

Bob mythtv at cox.net
Wed Sep 5 03:53:31 UTC 2007

Bryan Mayland wrote:
> Bob wrote:
>> 2007-09-03 21:14:44.753 ProcessPAT: PAT is missing program, setting timeout
>> ...
>> 2007-09-03 21:20:00.738 Finished recording Living Fresh "Green Sea": 
>> channel 4103
>> Could the "PAT is missing program" be my problem?
>     Absolutely.  MythTV requires a PAT, which points to a PMT which 
> points to the stream IDs for the program you want to record.  Without 
> this information the "signal monitor" never locks, and the recording 
> never starts. 
>     I had this same situation with my cable box, where it eats the PAT 
> and PMT so I'm working on cleaning up a patch for PID autodetection for 
> our stupid devices that don't provide this information.  Are you 
> familiar with using "patch"?  If so, I can give you a copy of my changes 
> against svn head and you can see if that works for you.
>     http://capnbry.net/~bmayland/fi/pvr150/firewire_sigmon_1.diff
> run that with `patch -p0 < firewire_sigmon_1.diff` from the mythtv base 
> directory.
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Thank you for your response.  To verify the hypothesis, I used 
test-mpeg2 to grab a stream from some of the same channels I have been 
trying to get mythtv to record.  The dvbsnoop program shows the PAT 
appears pretty regularly (447 packets between each).  I was hoping this 
was my problem, but it appears to be something else.  I will continue to 

How do I know if I am using the right connection speed?  Trial and error?

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