[mythtv-users] dnr_* settings info

[Andrew Dodd]

Quoting Myth TV <mythtv at maniclogic.org>:

> Does anyone have the *definitive* word on what these settings do or their
> ranges?  I've been playing with them and found that dnr_mode=3
> dnr_temporal=1 and dnr_spatial=1 stops the lower half screen flicker/jump
> I get when watching LiveTV.
> 
> I'm happy that it seems to greatly reduce these glitches, but I would love
> to know what I've been playing with.  Also are they binary values
> (temoral, spatial, and type) or are there ranges of values?
dnr_mode, dnr_spatial, and dnr_temporal are pretty well documented on the ivtv
project page (the Firmware API document)

dnr_mode=3 puts the DNR settings into full manual mode.
dnr_mode=0 sets it to automatic, whatever that may do.  :)

dnr_spatial can be from 0 to 15.  I usually set this to 6-8 depending on the
channel.  I'm going to be writing a script soon that sets these parameters on a
per-channel basis.  (i.e. really low for WNBC which comes in great for me, and
really high for WPIX which is really snowy.)  I never use more than 8 for
spatial (I've never seen much difference beyond 8).

dnr_temporal can be from 0 to 31.  I usually set this to 12-16 for most
channels, 8 for WNBC, and 24 for WPIX.  At 24, motion starts getting a little funky.

Haven't figured out what dnr_type does.