[mythtv-users] Fedora 16 - ivtv - no signal?!

[Nick Rout]

On Thu, Mar 15, 2012 at 7:56 AM, Alec Leamas <leamas.alec at gmail.com> wrote:
> I have updated yet another box to Fedora 16 with a Hauppage 350 pci
> card  which basically feeds /dev/video0 with a stream using the ivtv
> driver. When I run mythfrontend and tries to watch live TV, there is no
> signal at all, and thus no picture.
>
> I'm using 24-fixes, the fedora mythtv-24.2 packages (downgrading to 24.1
> makes no difference). I have also tried a clean, new setup. Same result.
> The kernel is 3.2.9
>
> The card looks fine, using ivtv-tune I can cat its output to a file and
> watch it (ivtv-tune... ;cat /dev/video0 > tmp.mpeg; vlc tmp.mpeg)
> The frontend is most likely not involved, and both the local and a
> remote FE gives same status.
> Which leaves the backend. Why on earth can't it grab the data? In the
> backend log I find
>
> 2012-03-14 19:43:11.452 TVRec(1): Changing from None to WatchingLiveTV
> 2012-03-14 19:43:11.500 TVRec(1): HW Tuner: 1->1
> 2012-03-14 19:43:11.549 LoadFromScheduler(): Error, called from backend.
> 2012-03-14 19:43:12.256 Channel(/dev/video0) Error:
> GetCurrentChannelNum(): Failed to find Channel
> 2012-03-14 19:43:12.286 Channel(/dev/video0)::TuneTo(): Error, failed to
> find channel.
>
> but switching channel doesn't help. The connection's initial channel is OK.
>
> I have used tvtime as a test tool earlier, but it also refuses to play,
> presenting an error about an inappropriate ioctl.

tvtime will not work with a PVR

"The ivtv driver supports cards that provide high quality MPEG2
encoded video. This cards are ideal for PVR systems. However, tvtime
has no MPEG2 decoding capabilities or audio playback code, and
therefore cannot be used to watch live TV from these cards."

http://tvtime.sourceforge.net/cards.html

> vlc also has functions
> to present data from /dev/video0 which doesn't work for me, but I have
> never tried that before so I don't really know what that might mean.
>
> Have anyone a clue out there? In particular, has something changed in
> the 3.2 kernel interfaces which neither mythtv 24-fixes  nor tvtime can
> handle?
>
> Or is just impossible to get it working if the initial channel is wrong
> (i. e., not what's in the Connection). If so, how do I change that?
>
> Or?
>
> Thanks in advance...
>
> --alec
>
>
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