[mythtv-users] living room myth pvr

Paul Andreassen paulx at andreassen.com.au
Wed Apr 5 14:30:26 UTC 2006


On Wed, 5 Apr 2006 10:48 pm, Warren wrote:
> Brian Wood wrote:
> > [snip]
> > I've read someplace that the video processing is better on the 150,
> > but that may well have been HogPaws propaganda, I haven't noticed any
> > difference, but they are newer chips.
>
> I have done side-by-side A/B comparisons of the 250 and the 150 and I
> have found that the 250's MPEG compression looks markedly better than
> the 150 at the same rate, especially at the lower rates.

Have you turn off the temporal filter?

$ ivtvctl -C
ioctl IVTV_IOC_G_CODEC ok
Codec parameters
aspect      : 2
audio       : 0x00e9
bframes     : 3
bitrate_mode: 0
bitrate     : 6500000
bitrate_peak: 8000000
dnr_mode    : 0
dnr_spatial : 0
dnr_temporal: 8
dnr_type    : 0
framerate   : 1
framespergop: 12
gop_closure : 1
pulldown    : 0
stream_type : 10
$ ivtvctl -c dnr_temporal=0

Seems to be on by default on my card.

Paul
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