[mythtv-users] Number of virtual tuners
Pieter De Wit
pieter at insync.za.net
Mon Apr 30 08:10:13 UTC 2012
On 30/04/2012 19:08, Simon Hobson wrote:
> Pieter De Wit wrote:
>
>> During the channel scanning phase a scan is done to see how many
>> channels a card can tune to. This can be done to /dev/null to drop
>> out disk/display and other bottle necks.
>>
>> Once this number is known, Virtual tuners can be used to record from
>> the real tuners. Virtual tuners is something that "we" control so we
>> can limit them based on other factors. I am sure we can safely say,
>> that you only need to display 2 channels at once (watch, someone will
>> give us a screenshot with 4 PnP's :) )
>
> That won't help in the general case - there is more to recording
> multiple streams than just getting them from the tuners and stuffing
> them on disk, not to mention that if you have multiple tuners then the
> system may not be able to handle the max no of recordings the tuners
> are collectively capable of doing while it can handle the max for any
> one tuner on it's own. It's been suggested earlier in the thread that
> some other factors come into play - for example, what does it do to
> the system when several recordings start at once and the <something>
> kicks in to update the database ? Then you've got an arbitrary number
> and type of user jobs, and an arbitrary number of frontends - in
> theory there's no limit to the number of frontends/TVs someone could
> have hanging off the backend.
I beg to differ - I think this can be done in code (mplayer does
something like what I am thinking - your system is to slow to play
this), but, since this seems to be the general feeling, I will leave it
at that
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