> -----Opprinnelig melding----- > Fra: [EMAIL PROTECTED] [mailto:ivtv-devel- > [EMAIL PROTECTED] På vegne av Jack Perveiler > Sendt: 28. april 2006 16:51 > Til: Discussion list for development of the IVTV driver > Emne: Re: [ivtv-devel] PVR-500 quality vs PVR-150 > > > > --- Marius Schrecker <[EMAIL PROTECTED]> wrote: > > > > > > > > -----Opprinnelig melding----- > > > Fra: [EMAIL PROTECTED] [mailto:ivtv-devel- > > > [EMAIL PROTECTED] P� vegne av Jack Perveiler > > > Sendt: 28. april 2006 14:17 > > > Til: Discussion list for development of the IVTV driver > > > Emne: Re: [ivtv-devel] PVR-500 quality vs PVR-150 > > > > > > --- Marius Schrecker <[EMAIL PROTECTED]> wrote: > > > > > > > > > > > > > > > > -----Opprinnelig melding----- > > > > > Fra: [EMAIL PROTECTED] [mailto:ivtv-devel- > > > > > [EMAIL PROTECTED] P� vegne av Steven Ellis > > > > > Sendt: 28. april 2006 03:40 > > > > > Til: Discussion list for development of the IVTV driver > > > > > Emne: Re: [ivtv-devel] PVR-500 quality vs PVR-150 > > > > > > > > > > Chris Rouch wrote: > > > > > > On 4/25/06, Steven Ellis <[EMAIL PROTECTED]> wrote: > > > > > > > > > > > >> I've been using the PAL models of these here in NZ and there > > are > > > > some > > > > > >> major quality issues with the captures. > > > > > >> > > > > > >> Ok the tuners are different (38 on the 150 and 56 on the 500) > > but > > > > the > > > > > >> 500 has a much better signal lock overall. Problem is I get a > > > > diagonal > > > > > >> wavy pattern across the picture with the 500, and the 150 is > > > > usually > > > > > >> very clear. > > > > > >> > > > > > >> My TV and VCR picture are both excellent, and i've even tried > > the > > > > > >> composite from the VCR into the 500 which still has the same > > > > picture > > > > > issues. > > > > > >> > > > > > >> Currently running IVTV 0.4.4 on Knoppmyth R5B7 with a 2.6.15 > > > > kernel. > > > > > >> > > > > > >> Anyone else noticed major differences with these two units? > > > > > >> > > > > > > > > > > > > I think the 500 is a bit iffy with low strength signals. I used > > to > > > > get > > > > > > problems with about half a dozen channels on mine, but I put in > > a > > > > > > cheap UHF signal booster and now the picture is fine on all > > channels > > > > > > (and with the signal split between 2 cards). > > > > > > > > > > > > > > > > > Got a signal booster, and overall picture quality is fine. The odd > > > > thing > > > > > is having the same wavy signal pattern on composite and tuner > > based > > > > > capture. > > > > > > > > > > Steve > > > > > > > > > /mailman/listinfo/ivtv-devel > > > > > > > > Could it be a pci or internal ambient interference problem? Have you > > > > tried a different slot? / moving it further away from other > > adapters, > > > > etc.? > > > > > > > > I'm also having quality issues with a PAL 500, the picture also > > seems > > > > worse on one of the tuners. I already have a masthead amp, but will > > try > > > > a second signal booster close to my Mythbox. > > > > > > > > Cheers > > > > > > > > Marius > > > > > > I have a NTSC PVR-500 and also have the diagonal wavey lines using the > > > tuner (I > > > think I've seen it referred to as a "herringbone pattern" elsewhere). > > > With my > > > amp it got dramatically worse: most channels show the effect. Without > > the > > > amp > > > only a few channels show it. I've moved the card around in my > > chassis, > > > tried > > > to put some grounded aluminum foil shielding between it and my ATSC > > > capture > > > card, even REMOVED all the other pci cards to no avail. I've noticed > > two > > > things, however: > > > > > > 1) The herringbone comes and goes. It'll be on for maybe 30 seconds, > > then > > > off > > > for 5 or 10. > > > 2) The card's dnr (when I turn it on) does a good job of removing the > > > effect > > > when it's mild and diminishing it when it's bad. > > > > > > Of course the signal looks fine when received by my cable box or tv... > > > > > > --Jack > > > > > What's the ivtv command for turning on the dnr? > > Marius > > > > > > _______________________________________________ > > ivtv-devel mailing list > > [email protected] > > http://ivtvdriver.org/mailman/listinfo/ivtv-devel > > > > The one I use is: > > /usr/local/bin/ivtvctl -d /dev/video2 -c > dnr_mode=3,dnr_temporal=0,dnr_spatial=0 > > A description of ivtvctl commands (including dnr stuff): > > http://ivtvdriver.org/index.php/Ivtvctl > > Note that my dnr_type is 0 (not listed, it's the default), but that link > above > describes dnr_type of 0 to be "disabled". I definitely notice a > difference, > though, so I don't know what that's all about. > > --Jack
Thanks for the tip. I don't know if the DNR defaults have changed in ivtv since about the 3.6 days, but I imagine I'm seeing a clearly worse picture with the same hardware since upgrading from 3.6, 3.7 to 4.x.... Maybe a disabling of dnr would explain that. Cheers Marius _______________________________________________ ivtv-devel mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-devel
