[mythtv-users] live TV program overrun causes loss of recording

[blind_Pete]

Something interesting just happened this evening.  

A TV program that I was interested in popped up on the guide, so I clicked on it for a single recording.  Earlier in the evening a live to TV program overran its schedule, by about 10 minutes, causing both the program after it and the program that I was interested in to be delayed as well.  

The first thing that I noticed was that MythTV had decided that the program was not listed an would not be recorded - despite it being clearly visible in the guide.  First the start time and program length changed, then later the end time changed and the program length returned to its original length.  I did not see the raw data for the guide.  (I'm not even sure how to get it.)  I don't know if the program length really changed or just the inferred length between adjacent start times changed.  A few program s have "gone missing" in the past, and this mechanism now seems highly suspicious to me.  

What is MythTV supposed to do in this situation?  I can't really complain that it is not doing what it is supposed to do before I find out what it is supposed to do.  Presumably one of the following is designed and maybe documented behaviour.

1) The change in schedule is detected and tracked, recording the program when it is broadcast.  

2) The change in schedule is ignored and the original time slot is recorded, possibly still recording the entire program if a big enough lead out time was configured.  

3) The change is detected and found to be too confusing - allowing the now unused tuner to record a lower priority program on another channel.  

4) The change is detected and found to be too confusing - and the tuner is left idle for the duration of the program.  

The data is coming from the free to air guide, but it is not an EIT problem because downloaded guides should be updated too.  It is just that the EIT data is updated more often and in this case at least reflected reality.  

I'm using a pre-compiled binary, mythtv-backend-0.24-20110303.1plf2010.2.x86_64.rpm

blind Pete