[gentoo-user] Subject: [gentoo-user-de] Xawtv/Scantv refus..

Hi,

Am Montag, 31. Jul 2006, 12:13:17 -0700 schrieb Richard Fish:
> On 7/31/06, Bertram Scharpf <lists DeleteThis @bertram-scharpf.de> wrote:
> >on my system Xawtv is installed with USE="zvbi", so that I
> >have `scantv' enclosed. Anyway, it doesn't work:
> >
> > # scantv
> > [...]
> > vbi: open failed [/dev/vbi]
> > open /dev/vbi: Invalid argument
>
> "strace -e open scantv" might give more info.

I larded the source code with printf statements and
recompiled it. Sorry, it's not `open' but
`vbi_capture_v4l2_new' that fails.

In the meantime I upgraded zvbi to version 0.2.22; the error
remains.

Thanks anyway.

Bertram


--
Bertram Scharpf
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On Monday 31 July 2006 21:07, Bertram Scharpf wrote:
> Hi,
>
> on my system Xawtv is installed with USE="zvbi", so that I
> have `scantv' enclosed. Anyway, it doesn't work:
>
> # scantv
> [...]
> vbi: open failed [/dev/vbi]
> open /dev/vbi: Invalid argument
> #
>
> I wonder how this error message could arise because of the
> following:
>
> # dd if=/dev/vbi bs=8 count=1 | od -x
> 1+0 records in
> 1+0 records out
> 8 Bytes (8 B) copied, 0.099231 seconds, 0.1 kB/s
> 0000000 374d 1620 341e 544a
> 0000010
> #
>
> I had a look at the source code but I found the open call
> parameters okay.
>
> Any clue what could be wrong there?
>
> Thanks in advance,

and what are the rights on /dev/vbi / /dev/vbi0 ?

And where does it point (I bet, it is just a symlink )
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Hi,

Am Mittwoch, 02. Aug 2006, 00:04:52 +0200 schrieb Hemmann, Volker Armin:
> On Monday 31 July 2006 21:07, Bertram Scharpf wrote:
> > # scantv
> > [...]
> > vbi: open failed [/dev/vbi]
> > open /dev/vbi: Invalid argument
> > #
> >
> > # dd if=/dev/vbi bs=8 count=1 | od -x
> > 1+0 records in
> > 1+0 records out
> > 8 Bytes (8 B) copied, 0.099231 seconds, 0.1 kB/s
> > 0000000 374d 1620 341e 544a
> > 0000010
> > #
>
> and what are the rights on /dev/vbi / /dev/vbi0 ?
> And where does it point (I bet, it is just a symlink )

It definitely is; I created it myself.

Bertram


--
Bertram Scharpf
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http://www.bertram-scharpf.de
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On Wednesday 02 August 2006 23:37, Bertram Scharpf wrote:
> Hi,
>
> Am Mittwoch, 02. Aug 2006, 00:04:52 +0200 schrieb Hemmann, Volker Armin:
> > On Monday 31 July 2006 21:07, Bertram Scharpf wrote:
> > > # scantv
> > > [...]
> > > vbi: open failed [/dev/vbi]
> > > open /dev/vbi: Invalid argument
> > > #
> > >
> > > # dd if=/dev/vbi bs=8 count=1 | od -x
> > > 1+0 records in
> > > 1+0 records out
> > > 8 Bytes (8 B) copied, 0.099231 seconds, 0.1 kB/s
> > > 0000000 374d 1620 341e 544a
> > > 0000010
> > > #
> >
> > and what are the rights on /dev/vbi / /dev/vbi0 ?
> > And where does it point (I bet, it is just a symlink )
>
> It definitely is; I created it myself.
>
> Bertram
>

it is a symlink? and does it point to the right device?

I never created anything - I let udev do it for me...
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Hi,

Am Donnerstag, 03. Aug 2006, 00:48:25 +0200 schrieb Hemmann, Volker Armin:
> On Wednesday 02 August 2006 23:37, Bertram Scharpf wrote:
> > Am Mittwoch, 02. Aug 2006, 00:04:52 +0200 schrieb Hemmann, Volker Armin:
> > > On Monday 31 July 2006 21:07, Bertram Scharpf wrote:
> > > > # scantv
> > > > [...]
> > > > vbi: open failed [/dev/vbi]
> > > > open /dev/vbi: Invalid argument
> > > >
> > > > # dd if=/dev/vbi bs=8 count=1 | od -x
> > > > 1+0 records in
> > >
> > > and what are the rights on /dev/vbi / /dev/vbi0 ?
> > > And where does it point (I bet, it is just a symlink )
> >
> > It definitely is; I created it myself.
>
> it is a symlink? and does it point to the right device?
> I never created anything - I let udev do it for me...

Another time to prevent any further link, symlink or access
rights discussion:

$ su -
Password:
# ls -la /dev/v4l/vbi0
crw-rw---- 1 root video 81, 224 1. Aug 19:50 /dev/v4l/vbi0
# mknod /tmp/myvbi c 81 224
# chmod a+rwx /tmp/myvbi
# ls -la /tmp/myvbi
crwxrwxrwx 1 root root 81, 224 3. Aug 20:36 /tmp/myvbi
# scantv -n PAL -f europe-west -C /tmp/myvbi
[...]
vbi: open failed [/tmp/myvbi]
open /tmp/myvbi: Invalid argument
# dd if=/tmp/myvbi bs=8 count=1 2>/dev/null | wc -c
8
#

AleVT works without complaint.

Bertram


--
Bertram Scharpf
Stuttgart, Deutschland/Germany
http://www.bertram-scharpf.de
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On Thu, 3 Aug 2006 20:47:24 +0200
Bertram Scharpf wrote:

> Hi,
>
> Am Donnerstag, 03. Aug 2006, 00:48:25 +0200 schrieb Hemmann, Volker Armin:
> > On Wednesday 02 August 2006 23:37, Bertram Scharpf wrote:
> > > Am Mittwoch, 02. Aug 2006, 00:04:52 +0200 schrieb Hemmann, Volker Armin:
> > > > On Monday 31 July 2006 21:07, Bertram Scharpf wrote:
> > > > > # scantv
> > > > > [...]
> > > > > vbi: open failed [/dev/vbi]
> > > > > open /dev/vbi: Invalid argument
> > > > >
> > > > > # dd if=/dev/vbi bs=8 count=1 | od -x
> > > > > 1+0 records in
> > > >
> > > > and what are the rights on /dev/vbi / /dev/vbi0 ?
> > > > And where does it point (I bet, it is just a symlink )
> > >
> > > It definitely is; I created it myself.
> >
> > it is a symlink? and does it point to the right device?
> > I never created anything - I let udev do it for me...
>
> Another time to prevent any further link, symlink or access
> rights discussion:
>
> $ su -
> Password:
> # ls -la /dev/v4l/vbi0
> crw-rw---- 1 root video 81, 224 1. Aug 19:50 /dev/v4l/vbi0
> # mknod /tmp/myvbi c 81 224
> # chmod a+rwx /tmp/myvbi
> # ls -la /tmp/myvbi
> crwxrwxrwx 1 root root 81, 224 3. Aug 20:36 /tmp/myvbi
> # scantv -n PAL -f europe-west -C /tmp/myvbi
> [...]
> vbi: open failed [/tmp/myvbi]
> open /tmp/myvbi: Invalid argument
> # dd if=/tmp/myvbi bs=8 count=1 2>/dev/null | wc -c
> 8
> #
>
> AleVT works without complaint.
>
> Bertram
>

What exactly is scantv scanning for when it scans the vbi device? Does
it find the teletext channels or something?

If you are looking to scan for tv channels then i think you want the
video device, not the vbi device, like

scantv -n PAL -f europe-west -c /dev/video0


--
Nick Rout <nick DeleteThis @rout.co.nz>

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Hi,

Am Montag, 07. Aug 2006, 10:15:31 +1200 schrieb Nick Rout:
>
> On Thu, 3 Aug 2006 20:47:24 +0200
> Bertram Scharpf wrote:
> > $ su -
> > Password:
> > # ls -la /dev/v4l/vbi0
> > crw-rw---- 1 root video 81, 224 1. Aug 19:50 /dev/v4l/vbi0
> > # mknod /tmp/myvbi c 81 224
> > # chmod a+rwx /tmp/myvbi
> > # ls -la /tmp/myvbi
> > crwxrwxrwx 1 root root 81, 224 3. Aug 20:36 /tmp/myvbi
> > # scantv -n PAL -f europe-west -C /tmp/myvbi
> > [...]
> > vbi: open failed [/tmp/myvbi]
> > open /tmp/myvbi: Invalid argument
> > # dd if=/tmp/myvbi bs=8 count=1 2>/dev/null | wc -c
> > 8
> > #
> >
> > AleVT works without complaint.
>
> What exactly is scantv scanning for when it scans the vbi device? Does
> it find the teletext channels or something?
>
> If you are looking to scan for tv channels then i think you want the
> video device, not the vbi device, like
>
> scantv -n PAL -f europe-west -c /dev/video0

As far as I understand it, the vbi device is needed to read
the channel names from teletext. I suppose the scanning
would work perfectly if only the vbi access could be
skipped.

This seems to be a Gentoo specific problem as the scan
used to work on my old Debian. As I mentioned AleVT works,
too.

Bertram


--
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http://www.bertram-scharpf.de
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