[pvrusb2] Fuzzy Video using Hauppauge WinTV PVR USB2

[cardboil]

Thanks Roger.  Actually, it turns out that my problem with video fuzziness
(esp. with fast moving objects) was due to issues with my video card driver
settings, not pvrusb2.  After some research, I found the right option to use
in my xorg.conf (to enable xvideo support for TV playback) and that took
care of the problem.

Now, things are OK, except that my signal reception from the tuner is poor.
Let me explain.

My cable connection carries both analog cable signals as well as encrypted
signals for use with digital STBs.  The channel reception is good
(non-grainy) both with the analog cable coax connected directly to the TV or
digital through the STB.  However, when I run the coax thru the WinTV PVR
USB2 tuner, the reception is not very good.  I've checked that my
frequencies are correct (did auto-tuning using Hauppage's Win TV application
on a Windows machine to obtain the frequencies).  But, for some inexplicable
reason, the picture captured by the tuner is rather grainy.  Sometimes, the
signal is so bad that there is a hissing in the audio and sometimes even no
audio at all on certain channels.  Note, when I use the tuner with a
Hauppage's windows driver and viewer application, the reception/picture
quality is very good.  So, it leads me to believe that may be my settings
for the pvrusb2 driver are not right.

Any ideas or pointers would be greatly appreciated.

On 12/14/05, roger <roger at eskimo.com> wrote:
>
> I think I've found your solution.  Seems I did document this issue on my
> webpage:
>
> http://www.eskimo.com/~roger/programming/pvrusb2.html
>
> See my very last entry:
>
> (2005.08.08) Noticed Mythtv requires quite a bit of cpu.  However, if
> you're noticing Mythtv use >99% on a ~1Ghz pentium3 cpu, you might want
> to try recompiling sys-libs/glibc (and ensuring you have included some
> cflag optimizations such as "-march=pentium3 -O3 -pipe
> -fomit-frame-pointer".  This seems to be the second report of compiling
> glibc w/o any optimizations caused Mythtv to use more cpu then one would
> expect.  Another idea, echo 1
> > /sys/class/pvrusb2/sn-7435104/ctl_interlace/cur_val.  (These are some
> ideas if you have already tried every other config setting within
> Mythtv's menus.)
>
>
> In brief, recompile sys-libs/glibc with some optimizations such as
> "-march=pentium3 -O3 -pipe -fomit-frame-pointer".
>
> (In the meantime, for the past month, I'm running into a bug where
> mythtv freezes when starting to playback video and am experimenting
> recompiling mythtv and glibc here.)
>
>
> On Mon, 2005-12-12 at 17:34 +0530, cardboil wrote:
> > My current value for ctl_interlace is 0.  Is that correct, or should I
> > change it to 1 -- in order to turn deinterlacing off?
>
> # echo 1 > /sys/class/pvrusb2/sn-7435104/ctl_interlace/cur_val
>
> > On 12/12/05, roger <roger at eskimo.com> wrote:
> > >
> > > I think I made mention earlier about using Mythtv and requiring to
> > > turn-off deinterlacing while watching tv in Mythtv.
> > >
> > > I believe you can also do this by doing:
> > > echo 1 > /sys/class/pvrusb2/sn-7435104/ctl_interlace/cur_val
> > >
> > _______________________________________________
> > pvrusb2 mailing list
> > pvrusb2 at isely.net
> > http://www.isely.net/cgi-bin/mailman/listinfo/pvrusb2
> >
> --
> Roger
> http://www.eskimo.com/~roger/index.html
> Key fingerprint = 8977 A252 2623 F567 70CD 1261 640F C963 1005 1D61
>
> Tue Dec 13 21:34:08 PST 2005
>
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