[mythtv-users] Stupid question - deinterlacing

[Daniel Kristjansson]

On Sun, 2009-02-22 at 11:46 -0800, Allen Edwards wrote:
> I am getting confused here.  Every day I watch TV on my old 36 inch
> CRT TV that takes a 480i input (I assume) from an nvidia card.  My
> myth is set up for BOB2 but it cannot load because the TV doesn't have
> the frame rate so I am getting no deinterlacing.  It looks great.
>
> Her is why I think that bob is not loading:
> 2009-02-22 09:30:05.526 Video sync method can't support double
> framerate (refresh rate too low for bob deint)
>
> So, what am I missing here?

Allen, I do the same thing in my bedroom, feed an old NTSC TV with
an nvidia card with no deinterlacing and it looks great. I do use
the "nv" drivers and not the "nvidia" proprietary driver. I haven't
bothered trying the "nvidia" driver on that machine since it works
great the way it is. I tried outputting 1080i long ago using the
"nvidia" driver and it worked fine. But I've been told by people I
trust that the newer nVidia drivers and ATI drivers do not properly
support interlaced monitors. Mark Kendall wrote some special
"non-deinterlacing deinterlacers" that work around the driver bugs.
I believe they work by essentially doing a bob-deint without the
bobbing. When handed to one of these broken drivers and synced
correctly the hardware ends up sending out interlaced video showing
the correct fields.

-- Daniel