[ivtv-users] ivtv, kernel 2.6.27, secam TV, Hauppauge PVR-350 : no sound on non stereo channels

[Sander Sweers]

On Sun, Oct 12, 2008 at 22:25, pascal <pascal at schirrms.net> wrote:
> I use hauppauge cards since a few year, under linux and with ivtv.  (a
> PVR 350 and a PVR 150). each card is in a different system running freevo.

It would be interesting to not start freevo and do:
  cat /dev/videX > test.mpg

And see if this does give you sound.

> After the update, I noticed that most channel didn't have any sound.
> Searching further, I discovered that channels I can hear are sendind the
> audio signal in stereo (SECAM stereo is NICAM, a numeric soundtrack
> encoded in some unseen video lines in the picture, because original
> SECAM sound modulation was AM, and not updatable to stereo). Other
> channel were muted.
>
> I finaly found that this behavior can be changed :
>
> By default, freevo set the tuner in 'generic secam' : v4l2-ctl -S tell me :
>
> $ v4l2-ctl -S
> Video Standard = 0x00ff0000
>        SECAM-B/D/G/H/K/K1/L/Lc
>
> French flavour of SECAM is SECAM L. If I set the tuner for SECAM-L :
>
> $ v4l2-ctl -s secam-L
> Standard set to 00400000
> $ v4l2-ctl -S
> Video Standard = 0x00400000
>        SECAM-L
>
> Then I have again sound.
>
> Here the question : should I consider that new way like a bahaviour ? Or is that a 'bug' ?

Probably not a bug. Before you run freevo run v4l2-ctl --log-status.
Could you post this? It is always good to include the complete ivtv
init start to end (don't grep for only ivtv) from the kernel log.

Greets
Sander