On 22.12.2012 13:51, Helmut Jarausch wrote:
>
> Is there any means to set this without v4l2-ctl ?
Yes, there is a sysfs way to do this...
>
> Here, I do not have
> /sys/class/pvrusb2/sn-8039400/ctl_video_standard
I believe there was a change a while back which eliminated that
particular control (because the underlying V4L feature I believe went
away). However you can achieve the same effect with another control.
IIRC, it's ctl_video_standard_mask_active. I can e-mail additional
detail about that, if you haven't already figured it out.
Yes please, because
echo "PAL" >
/sys/class/pvrusb2/sn-8039400/ctl_video_standard_mask_active/cur_val
gave echo: write error: invalid argument
and cat
/sys/class/pvrusb2/sn-8039400/ctl_video_standard_mask_active/cur_val
showed a null string.
After issueing v4l2-ctl -s "pal"
the same command gives
PAL-B PAL-B1 PAL-G PAL-H PAL-I PAL-D PAL-D1 PAL-K
Why don't you try writing one of these values to the cur_val? Check in
e.g. Wikipedia which one corresponds to your country (for Germany it's
AFAIK PAL-G).
Regards,
Sven
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