[mythtv-users] HDPVR problems

[Tom Runner]

On Sat, Feb 5, 2011 at 9:06 AM, Mark Dryden <renegade8040 at gmail.com> wrote:

>
>
> On Fri, Feb 4, 2011 at 5:39 PM, Ramin K <ramin-list at badapple.net> wrote:
>
>> On 2/4/2011 4:04 PM, Mark Dryden wrote:
>>
>>> Hi,
>>> I followed the instructions found at http://www.mythtv.org/wiki/HDPVR
>>> and everything goes well until I get to the part where you run the
>>> command "cat /dev/video1 > test.ts".  I get the error message "cat:
>>> write error: Bad address".  I'm not exactly sure why and I have been
>>> trying to figure it out for the past 2 days.  I also can't view live tv,
>>> it shows up as a black screen.  Any suggestions?
>>>
>>
>>        Are you sure your device is on /dev/video1 instead of /dev/video0
>> which is usually the default? Do an ls /dev and see which /dev/videoXX you
>> have, then follow the wiki based on that.
>>
>> Ramin
>> _______________________________________________
>> mythtv-users mailing list
>> mythtv-users at mythtv.org
>> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>>
>
>
> My device is on /dev/video0 for sure.  Using Roberts suggestion I ran
> "v4l2-ctl --device=/dev/video0 --set-input=2" to set the video input to be
> composite.  Now I can use the cat command to create a video file that
> actually works.  I have a new problem though.  When I open the mythtv front
> end, the video input is set to 0 which is component.  I think that's why I'm
> getting a black screen when I try to watch live tv from the front end.  I
> have the back end capture card setup to use the composite inputs but that
> doesn't seem to work.  Also I now know that my channel change script doesn't
> work.  Why would the front end switch the video input on me?
>
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>
> Hi Mark,

Normally the command "v4l2-ctl --device=/dev/video0 --set-input=2" will just
set temporarily the input and will not override the mythbackend setup.
During the various test I made, I noticed the HDPVR is touchy with the
cables. I faced sometimes the /dev/video0 being changed to /dev/video1,
simply because I unplugged the usb cable (I'm using ubuntu).
What I would check:
- on the  HDPVR, only having composite cable being plugged, if for instance
you have spdif in but not out, it may not work
- on the backend, cross-check again the card is well set on /dev/video0
- backend input card, making sure you have your source setup on Composite
(3r line normally). I guess your problem is here.
- still backend input card, composite, making sure you have /bin/true in the
"external channel change"

Finally if all is good, please provide the log error.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mythtv.org/pipermail/mythtv-users/attachments/20110205/40818438/attachment.htm>