On Wed, 1 Apr 2009 07:49:41 +0200, Hans Verkuil <[email protected]> said:
> On Wednesday 01 April 2009 06:32:55 Christopher Neufeld wrote:

>> I've got KnoppMyth for my mythtv box, running a 2.6.23 kernel that's
>> about 9 months old.
>> 
>> Running the command:
>> # v4l2-ctl --get-sliced-vbi-out-cap
>> produces no output.

> No, it's working. You have to use 'v4l2-ctl -c stream_vbi_format=1' to 
> enable it.

> That said, sliced VBI was broken for quite some time, i.e. it would produce 
> garbled closed captions. That was fixed in 2.6.27.

> And I don't know where you got v4l2-ctl from, but a bug in that program 
> relating to --get-sliced-vbi-out-cap was fixed October 2007. It seems you 
> have that buggy v4l2-ctl version.

Well, I upgraded again, to KnoppMyth's new character, LinHES R6.00.07.

The new kernel is a 2.6.28 kernel.  However, I haven't seen any change in
the behaviour I described above.  To be sure, I downloaded ivtv-utils-1.3.0
directly from
http://dl.ivtvdriver.org/ivtv/archive/1.3.x/ivtv-utils-1.3.0.tar.gz 
and compiled a v4l2-ctl binary. 

Here are three consecutive commands and their outputs.

# ./v4l2-ctl -b cc --verbose
VIDIOC_QUERYCAP: ok
VIDIOC_S_FMT: ok

# ./v4l2-ctl -c stream_vbi_format=1 --verbose
VIDIOC_QUERYCAP: ok
VIDIOC_S_EXT_CTRLS: ok

# ./v4l2-ctl --get-sliced-vbi-out-cap --verbose
VIDIOC_QUERYCAP: ok
VIDIOC_G_SLICED_VBI_CAP: failed: Invalid argument


modinfo ivtv shows that the version is 1.4.0.


Is there something I can do to diagnose this problem?

-- 
 Christopher Neufeld
 Home page:  http://www.cneufeld.ca/neufeld
 "Don't edit reality for the sake of simplicity"

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