[mythtv] Shouldn't MythTV disable the tuner between switching inputs?

[Daniel Kristjansson]

On Sat, 2008-01-05 at 15:56 -0800, Sam Logen wrote:
> --- Sam Logen <starz909 at yahoo.com> wrote:

>   Anyhow, when I'm attaching a device to a/v
> connectors on a PVR-150, and I'd like to watch Livetv
> through that, instead of the tuner, I can't seem to
> change my inputs on the card because the tuner isn't
> being shut off first (I have programming on the tuner,
> so I want to keep that input source).  I'm just asking
> if it's not better to have Mythtv shut off the tuner
> before switching away from it to a different input.

Historically the ivtv driver has not had a problem with switching
inputs. Do you have any information on when the driver was changed
and do you know if this only applies to the PVR-150 or the whole
range of ivtv cards? Turning off the tuner would introduce a channel
changing delay for all MPEG-2 recording cards and turning on and off
the tuner when special hardware requires it is really a job for
the driver anyway, we shouldn't need to special case for particular
hardware or particular V4L2 drivers in MythTV; we don't really have
enough information, and that taking care of that stuff is the main
reason we bother with drivers in the first place for an application
like MythTV.

FYI I'm stuck using an older ivtv since the current drivers, starting
a little before 1.0.0, don't support 608 captions on PVR-250 cards.
Until that is fixed there probably won't be many additions to MythTV
to support newer ivtv driver revisions.

-- Daniel