Re: saa7134_empress standard vs input

["Gordon Smith" <spider.karma+video4linux-list@xxxxxxxxx>]

On Thu, Sep 4, 2008 at 12:22 AM, Hans Verkuil <hverkuil@xxxxxxxxx> wrote:
>
> On Wednesday 03 September 2008 23:48:39 Gordon Smith wrote:
> > Greetings -
> >
> > I have a RTD Technologies VFG7350 (saa7134 based, two channel,
> > hardware encoder per channel, no tuner) running current v4l-dvb in
> > 2.6.25-gentoo-r7.
> >
> > Short form question: Is it necessary to do something to connect an
> > input standard to an MPEG encoder?
> >
> > I seem to have a disconnect between input signal and the MPEG
> > encoder. In this case, there is a NTSC camera signal on the input.
> > Raw data and input selection are on video0. Raw data can be read from
> > and input selected on video0. MPEG encoder output is on video2. MPEG
> > data can be read from video2, but it looks like PAL aspect with NTSC
> > data (extra lines at bottom of image repeat uppermost lines).
> >
> >
> > $ v4l2-ctl --get-standard --device /dev/video0
> > Video Standard = 0x0000b000
> >         NTSC-M/M-JP/M-KR
> > $ v4l2-ctl --get-standard --device /dev/video2
> > Video Standard = 0x000000ff
> >         PAL-B/B1/G/H/I/D/D1/K
> >
> >
> > The input standard is automatically selected by the hardware.
> > Is there something that needs to be set to match the standard between
> > input and encoder?
>
> I suspect I know what is wrong. After loading the driver
> run 'v4l2-ctl -s ntsc-m' and see if the capture now works. Ignore the
> standard as reported by video2: it's bogus and is unused.
>
> What I believe is happening is that the saa6752 is never told that the
> standard is NTSC when it is loaded the first time. But if you set it
> explicitly afterwards, then it probably works.
>
> Let me know what happens. If it is indeed a bug then I'll fix it.

I set the standard as above as well as just "ntsc" on another attempt,
but the the capture is still PAL size.

{{{
$ v4l2-ctl -s ntsc-m --device /dev/video0
Standard set to 00001000
}}}

>
> Regards,
>
>        Hans

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