[EMAIL PROTECTED] wrote:
Anyhow I'm looking at replacing the card. Quality-wise does the
recorded picture on a PVR-150 look as good as a PVR-250? Also most
important is stability, is the ivtv driver as stable with the 150 as it
is with the 250? And finally does the PVR-150 work well with MythTV (I
use the S-video in only)?
I have a 250 and a 150. The 150 is as stable ivtv driver-wise as
the 250. MythTV has no problems with either.
The picture quality is different on my two cards though, and I've heard
there's a lot of variance on both side. Here's a comparison shot on tuner:
http://capnbry.net/~bmayland/fi/pvr150/pvr150-250.jpg
And on S-Video:
http://capnbry.net/~bmayland/fi/pvr150/pvr150-250-2.jpg
I initially got a 150 thinking that the comb filter would be better but
that may or may not be the case. My boss has a 150 that has much better
quality than my 150. I can screw with some of the parameters an get the
150 looking much better The blurry picture in the first sample is
because the channel is because the LCOMB_ERR_LIMIT is exceeded and it
disables the luma comb completely. This can be tweaked of course on the
fly with cx25840ctl, but you can go overboard:
http://capnbry.net/~bmayland/fi/pvr150/lcomb_overboard.jpg
There are also some other settings I've used to get a little better
quality too. However, the S-Video doesn't use the comb filter logic at
all, so you won't have to worry about playing with those. One thing I
think you might like is turning on the luma peak amp. The 250 has a
+5.5 (iirc) dB gain applied to the luma signal to make it sharper. This
can be done on the 150 by setting PEAK_EN=1 and PEAK_SEL=2.
I think I have a couple other screen grabs in that directory too, go
ahead and have a look.
http://capnbry.net/~bmayland/fi/pvr150/
Long and the short is that it is a crap shoot I think. Some 150s are
better than 250s, some 250s are better than 150s.
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