Mailing List Archive

At 03:46 PM 5/29/2003 -0400, Jeff Waters wrote:
>Hey all,
>
>I know I'm prob not the first to ask but I've not seen this question
>lately.

When you do see it (if you look in the archive), you will see that the
usual response is that you probably have misspecified your tuner type (in
bttv) or your frequency range (in the setup for Myth, or xawtv if you're
using it to test hardware). Unless you tell us those settings, and what
country you are in (to see if the frequency-set choice makes sense), there
is little we can offer in the way of advice.

BTW, how many different cable providers have you been trying Myth with?
Since you say the problem occurs "no matter what cable provider I have."

>When I run ./setup and then mythfilldatabase I have to use --manual and
>fine tune every channel +111.
>
>If I don't then every channel is off by 1 and fuzzy.
>
>I'm using the ATI TV Wonder (not VE or Usb) and have had to do this no
>matter what cable provider I have.
>
>I'm assuming it's some sort of software adjustment I need to make on my
>box to avoid this, but I'm lost as to where.

On Thu, 2003-05-29 at 16:15, Ray Olszewski wrote:
> At 03:46 PM 5/29/2003 -0400, Jeff Waters wrote:
> >Hey all,
> >
> >I know I'm prob not the first to ask but I've not seen this question
> >lately.
>
> When you do see it (if you look in the archive), you will see that the
> usual response is that you probably have misspecified your tuner type (in
> bttv) or your frequency range (in the setup for Myth, or xawtv if you're
> using it to test hardware). Unless you tell us those settings, and what
> country you are in (to see if the frequency-set choice makes sense), there
> is little we can offer in the way of advice.
>
> BTW, how many different cable providers have you been trying Myth with?
> Since you say the problem occurs "no matter what cable provider I have."
>
> >When I run ./setup and then mythfilldatabase I have to use --manual and
> >fine tune every channel +111.
> >
> >If I don't then every channel is off by 1 and fuzzy.
> >
> >I'm using the ATI TV Wonder (not VE or Usb) and have had to do this no
> >matter what cable provider I have.
> >
> >I'm assuming it's some sort of software adjustment I need to make on my
> >box to avoid this, but I'm lost as to where.
>
>
>
>
>
> _______________________________________________
> mythtv-users mailing list
> mythtv-users@snowman.net
> http://lists.snowman.net/cgi-bin/mailman/listinfo/mythtv-users


Hmmm I'm going to sound really dumb here,.. but where do you specify
your tuner type? (I've no clue what the tv wonder uses) And... where do
I use bttv?
To be honest I bought the card, slapped it in and Mandrake said hey
there is a new card and I started up xawtv and it scanned for channels
and I was up and working... of course all the channels were off by 1 and
fuzzy so I messed around with it till I figured out it was +111 off in
the fine tuning. So I've been adjusting it like that since I bought it a
year ago. I've used (here in Ohio) Time Warner and now Wide Open West
cable.
I have never messed with Bttv... although from your response it seems I
should have.
I guess I need to read the man page on bttv then.

Thanks,
Jeff

At 04:40 PM 5/29/2003 -0400, Jeff Waters wrote:
[...]
>Hmmm I'm going to sound really dumb here,.. but where do you specify
>your tuner type? (I've no clue what the tv wonder uses) And... where do
>I use bttv?

bttv is a kernel module that provides the interface to many v4l
(video4linux) vidcap cards ... the ones that use the bt848 or bt878 chips.
If you run "lsmod", it should show that bttv is running. You'll also see an
i2c module (I forget the excact identifier) and a tuner module (which
handles channel changing).

I don't use Mandrake myself, so I'm not certain where you specify module
options. The usual place is /etc/modules.conf . bttv autoprobes cards and
tries to figure out the card type and the tuner type on its own. In your
case, it *may* be guessing the wrong tuner type (possibly guessing type 2
when you have type 17, but here I'm really going out on a limb, based not
on personal knowledge but imperfect memory of other messages I've seen here).

Anyway, to see what you have, check the dmesg buffer right after you
boot/init the system (use the command "dmesg" to do this), or see if
Mandrake, like may distros, copies the initial contents of this buffer to a
file in /var/log . Either way, look for lines with "bttv" in the to see
what you are getting.

There is no man page for bttv, since it is a kernel module. Look in the
kernel documentation (that comes with kernel source) for a bttv
subdirectory, to see the docs for this module.

Before xawtv started scanning for channels, you had to tell it what
frequency set to use. Some USA cable operators use us-cable, others
us-cable-hrc, and there's no way to know unless they tell you (or you try
both and then use the one that works better). The two frequency sets are
somewhat similar, so if you guessed wrong, you might be seeing what you
describe.

So ... to sum it up ... your problem still may be wrong tuner type or wrong
frequency set. You haven't told us enough to tell. But with this additional
information, you may be able to track down the needed details.

>To be honest I bought the card, slapped it in and Mandrake said hey
>there is a new card and I started up xawtv and it scanned for channels
>and I was up and working... of course all the channels were off by 1 and
>fuzzy so I messed around with it till I figured out it was +111 off in
>the fine tuning. So I've been adjusting it like that since I bought it a
>year ago. I've used (here in Ohio) Time Warner and now Wide Open West
>cable.
>I have never messed with Bttv... although from your response it seems I
>should have.
>I guess I need to read the man page on bttv then.

On Thu, 2003-05-29 at 17:03, Ray Olszewski wrote:
> At 04:40 PM 5/29/2003 -0400, Jeff Waters wrote:
> [...]
> >Hmmm I'm going to sound really dumb here,.. but where do you specify
> >your tuner type? (I've no clue what the tv wonder uses) And... where do
> >I use bttv?
>
> bttv is a kernel module that provides the interface to many v4l
> (video4linux) vidcap cards ... the ones that use the bt848 or bt878 chips.
> If you run "lsmod", it should show that bttv is running. You'll also see an
> i2c module (I forget the excact identifier) and a tuner module (which
> handles channel changing).
>
> I don't use Mandrake myself, so I'm not certain where you specify module
> options. The usual place is /etc/modules.conf . bttv autoprobes cards and
> tries to figure out the card type and the tuner type on its own. In your
> case, it *may* be guessing the wrong tuner type (possibly guessing type 2
> when you have type 17, but here I'm really going out on a limb, based not
> on personal knowledge but imperfect memory of other messages I've seen here).
>
> Anyway, to see what you have, check the dmesg buffer right after you
> boot/init the system (use the command "dmesg" to do this), or see if
> Mandrake, like may distros, copies the initial contents of this buffer to a
> file in /var/log . Either way, look for lines with "bttv" in the to see
> what you are getting.
>
> There is no man page for bttv, since it is a kernel module. Look in the
> kernel documentation (that comes with kernel source) for a bttv
> subdirectory, to see the docs for this module.
>
> Before xawtv started scanning for channels, you had to tell it what
> frequency set to use. Some USA cable operators use us-cable, others
> us-cable-hrc, and there's no way to know unless they tell you (or you try
> both and then use the one that works better). The two frequency sets are
> somewhat similar, so if you guessed wrong, you might be seeing what you
> describe.
>
> So ... to sum it up ... your problem still may be wrong tuner type or wrong
> frequency set. You haven't told us enough to tell. But with this additional
> information, you may be able to track down the needed details.
>
> >To be honest I bought the card, slapped it in and Mandrake said hey
> >there is a new card and I started up xawtv and it scanned for channels
> >and I was up and working... of course all the channels were off by 1 and
> >fuzzy so I messed around with it till I figured out it was +111 off in
> >the fine tuning. So I've been adjusting it like that since I bought it a
> >year ago. I've used (here in Ohio) Time Warner and now Wide Open West
> >cable.
> >I have never messed with Bttv... although from your response it seems I
> >should have.
> >I guess I need to read the man page on bttv then.
>
>
> _______________________________________________
> mythtv-users mailing list
> mythtv-users@snowman.net
> http://lists.snowman.net/cgi-bin/mailman/listinfo/mythtv-users
>

Ray, Thanks bro! That helped with the tuner. Your a lifesaver man.
Now to get the hardware audio to capture and save some of my processor
for the rest of my apps.

-Jeff