[mythtv-users] Commercial Detection during recording

[Simon Hobson]

Robert Dege wrote:
> Does enabling "Auto-commercial-detection jobs when recording starts" add a significant amount of overhead to the system?
> Right now, I can simultaneously record three shows (via HD Prime) onto two physical hard drives, while I'm watching a previously recorded show without issue. I'm just wondering if the additional commercial detection (3 max) would be too much for the system.


You'd have to try it with your hardware, your signal sources, and your recording profile - no-one else will have exactly the same setup as you.

Commflagging during record will actually result in less I/O than doing it afterwards. As long as the process can keep up (more or less) then the data it's working with will already be in memory as it will have been cached when the record process wrote it to disk.
So, for example, if you currently commflag after the recording has finished, you'll be doing a lot of I/O (reads mostly) while you are recording the next program. Switch to commflagging while recording and you may find I/O goes down and you can handle more concurrent tasks.