Date: Wed, 20 Dec 2006 11:42:08 +1100 From: "Stephen Hocking" <stephen.hocking@gmail.com> To: "usleepless@gmail.com" <usleepless@gmail.com> Cc: multimedia@freebsd.org Subject: Re: MythTV (was: Possible FreeBSD port?) Message-ID: <6300771b0612191642k3cda3985o4b860b839847f9d8@mail.gmail.com> In-Reply-To: <c39ec84c0612191554v280ddc3bq4493ebdecb3b8de@mail.gmail.com> References: <6300771b0612181401i72e7cc58ta08e12de8d68d4d0@mail.gmail.com> <20061218232247.GQ4364@wantadilla.lemis.com> <6300771b0612181533m6ece3f38p379c78a75912d10d@mail.gmail.com> <6300771b0612181534h3158342aw554869660fc707ea@mail.gmail.com> <20061218234041.GU4364@wantadilla.lemis.com> <c39ec84c0612190937u572ff6bco28606f54645275a5@mail.gmail.com> <20061219224005.GC4364@wantadilla.lemis.com> <c39ec84c0612191509w6a5ccf10iedb640bb8dacef1c@mail.gmail.com> <6300771b0612191524y64af793cy10f9bff4193536c7@mail.gmail.com> <c39ec84c0612191554v280ddc3bq4493ebdecb3b8de@mail.gmail.com>
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On 12/20/06, usleepless@gmail.com <usleepless@gmail.com> wrote:
>
> Stephen,
>
> On 12/20/06, Stephen Hocking < stephen.hocking@gmail.com> wrote:
> > On 12/20/06, usleepless@gmail.com <usleepless@gmail.com> wrote:
> > >
> > >
> > > i did not make a port, but i am willing to help. but if people are
> > > interested in a 0.18-fixes-postgresql-heavily-modified port of mythtv,
> > > let me know. if there is enough interest we might pull it off.
> > >
> > > but i got the impression of the list that only the most recent version
> > > of mythtv is worth aiming for ( i have no need to go to .19 or .20 )
> >
> >
> >
> > I think that you're probably right as regards the versions, but have you
>
> > thought of pushing your patches back to the maintainers
> > of MythTV?
> >
> > Stephen
>
> thank you for asking.
>
> are you subscribed to any of the mythtv lists? i am.
Yup, certainly am. There's a few outstanding bugs that bother me (backend
crashes
after transcode when another program is being watched).
they don't want to talk about changes to the database-layer: they
> don't think the database is important and would rather have nothing to
> do with sql. when i proposed to make mythtv cross-database-compatible
> ( mysql, postgresql, mssql etc ), they responded with "we might move
> to a embedded db like firebird"?. shutting off postgresql totally.
Yeah, I can vaguely recall some of the debate on the lists. It's a shame -
I try & write code so that it's as portable as possible, with appropriate
abstraction layers, which dates from the time I used to port stuff from
BSD over to uPort V/AT (286 SVR2).
furthermore, the interprocess-communication in mythtv is horrific,
> mostly busy wait loops, which makes a context-switching-hell.
> unfortunatly mythtv developers lack essential db and ipc skills. the
> abstraction is pretty good though.
What were they smoking? Surely a simple select(2) would be good enough?
they are hunting ghosts too: in the mailing lists "hickups" are
> discussed regulary: they are fiddling with process priorities between
> frontend and database/backend. at the same time they throw immense
> queries to the db which could be so much more efficient with a proper
> datamodel.
Yes, I've seen the recommendations about putting the DB on a separate
spindle
to the recordings.
for my own install, i implented a "settings cache" even before they
> did! before this, every setting was queried from the db _everytime_ it
> was used (ie: roundtrips all the time ).
Yeah, it's not likely that you'll be changing things on a another session
when you're currently active.
> i am under the impression that most of the changes in .19 and .20 are
> digital-broadcast-specific. this is of no interest to me: i am running
> on 2 pvr500s.
I'm all digital, and as far as I'm aware, there's no settled kernel API for
DVB-T cards (or video really, in general) for FBSD.
Stephen
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