[mythtv] Corrupt analog recordings

Torbjörn Jansson torbjorn.jansson at mbox200.swipnet.se
Mon Aug 14 16:11:59 UTC 2006

mythtv-dev-bounces at mythtv.org <> wrote:
> Torbjörn Jansson wrote:
>> The problem for me is that i don't have a reliable way of
>> reproducing this so testing out different encoding settings is going
>> to be problematic. 
>> But i'll check the settings and see if i have some of those options
>> on. I haven't changed messed with the encoding options much, must be
>> a year (or two) or so maybe since i changed anything there.
> You don't have to get a corrupted recording to have problems.
> If the CPU
> can't keep up, the encoder may just drop a frame every so
> often to keep
> up. The thing that tipped me off to this was all of a sudden
> my analog
> recordings went from about 1 Gig an hour to about 600 Meg an
> hour. Then
> I also got a few corrupted recordings.
> When the backend is doing software encoding if the CPU is at 100% you
> are most likely at least dropping frames, and possibly getting blocky
> corrupt recordings. 

Dropped frames is perfectly fine when cpu utlilization is 100% or close, but
even then, i should not have a blocky and messed up picture.
What should have happend is that i get frame dropp and the video will not be

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