[mythtv] NTP config

[Steve Adeff]

On Thursday 20 October 2005 09:14, Daniel Kristjansson wrote:
> On Thu, 2005-10-20 at 08:58 -0400, Steve Adeff wrote:
> > On Thursday 20 October 2005 06:35, Andrew Wilson wrote:
> > > On 19/10/05, Adrian Wilkins <adrian.wilkins at gmail.com> wrote:
> > > > As an aside, the "dvbdate" utility makes a fabulous alternative to
> > > > NTP
> > >
> > > Yes, this is one of the nice spinoffs of using DVB. I have it sync the
> > > clock on bootup and in a daily cron job. Works perfectly, You need to
> > > tune first though. Do something like:
> >
> > unless your cable company doesn't send the signal for this! I just tried,
> > but either comcast doesn't support this or I have to tune to a specific
> > channel?
>
> I think dvbdate only works with DVB streams, ATSC uses a different
> system time table. I've considered adding this capability to MythTV,
> which can decode the ATSC STT, but the time isn't nearly as accurate
> as ntpd and it would be somewhat complicated to adjust the clock as
> nicely as a running ntpd daemon does it. If I did implement it, I
> would probably just make MythTV a read-only ntpd server which your
> ntpd could connect to if it doesn't have a better time source.
>
> DVB/ATSC time can never be as accurate as ntpd time because the
> transmission, buffering, and capture delays can not be measured.
> But it should always be within a few seconds of the correct time,
> so it is more than good enough for a MythTV backend.
>
> -- Daniel

Well, in that case I'll continue using ntp.

thanks for the info!

Steve