[mythtv-users] Live TV Program Change Over

[Pieter De Wit]

> well of course now that I think about it, a new "recording" will start
> on program changeover, so there will inevitably be some glitch as the
> frontend closes one file and opens another.
>
> Having said that, it is concerning that 0.25 seems to have made it
> worse for you.
>
> Do you need to file a bug report/ticket?
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Hi Nick,

Is there not a buffer read process in the front end that will avoid this 
? I can't claim to know the inners of Myth, but it would make sense to 
me to have something that is reading a stream, into a buffer, then when 
the change over happens, the buffer might drain a bit but it will fill 
up again as soon as the new file is opened ? If this is the case, an 
increase might be needed ?

In my findings it's the writes that is slowing everything down, causing 
so much IO that the read process is starved. Again, not knowing the 
inners, perhaps someone has sneaked in a O_SYNC where there shouldn't be 
? :)

Happy to strace the front end :)

Versions : mythbackend version: master [v0.25-beta-165-g53761e2] 
www.mythtv.org
ii  mythtv-frontend                        
2:0.25.0~master.20120316.53761e2-0ubuntu1    A personal video recorder 
application (client)

My install is a "12.04" install of mythbuntu.

Cheers,

Pieter