Moving Black stripes

[Bartek Zdanowski]

Hi.

I'm using somagic-capture with mplayer to see if it's currently working, and I have good vision of camera image but with moving stripes as seen on picture

https://plus.google.com/photos/103765381777148377623/albums/6043412875128691249/6043412881244533730?banner=pwa&authkey=CJL2lsnN1oilaQ&pid=6043412881244533730&oid=103765381777148377623

I'm using standard command

sudo somagic-capture | mplayer -vf yadif,screenshot -demuxer rawvideo -rawvideo "pal:format=uyvy:fps=25"  -

HELP PLEASE.

Bartek

[Jon Arne Jørgensen]

Is it supposed to be black and white?
Could it be that your camera is NTSC or something different than PAL?

The rolling stripes is usually an indication of synchronization errors.

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[Bartek Zdanowski]

It's PAL.

Exactly 

http://www.dipolnet.com/b-w_camera_-_c3102-01a1-video-dc_without_lens__M10762.htm

I bought it in Poland, where I live and here we have PAL system. I tried to change system in mplayer command line but image flickered.

The image is stable but this black stripe is slowly going down from top to bottom.

On Sunday, August 3, 2014 9:06:57 PM UTC+2, Jon Arne wrote:

Is it supposed to be black and white?
Could it be that your camera is NTSC or something different than PAL?

The rolling stripes is usually an indication of synchronization errors.

On Sun, Aug 3, 2014 at 8:51 PM, Bartek Zdanowski
<bartek.z...@gmail.com> wrote:
> Hi.
> I'm using somagic-capture with mplayer to see if it's currently working, and
> I have good vision of camera image but with moving stripes as seen on
> picture
>
> https://plus.google.com/photos/103765381777148377623/albums/6043412875128691249/6043412881244533730?banner=pwa&authkey=CJL2lsnN1oilaQ&pid=6043412881244533730&oid=103765381777148377623
>
> I'm using standard command
> sudo somagic-capture | mplayer -vf yadif,screenshot -demuxer rawvideo
> -rawvideo "pal:format=uyvy:fps=25"  -
>
>
> HELP PLEASE.
>
> Bartek
>
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> You received this message because you are subscribed to the Google Groups
> "easycap-somagic-linux" group.
> To unsubscribe from this group and stop receiving emails from it, send an

> email to easycap-somagic-linux+unsub...@googlegroups.com.

[Jeffry Johnston]

Does --sync=1 help? If not, try --pal-4.43.
Jeff

On Sun, Aug 3, 2014 at 12:51 PM, Bartek Zdanowski

>> > email to easycap-somagic-...@googlegroups.com.

>> > For more options, visit https://groups.google.com/d/optout.
>>
>>
>>
>> --
>> Jonarne
>> http://jonarne.no
>

> --
> You received this message because you are subscribed to the Google Groups
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[Jon Arne Jørgensen]

Also, I guess you have tried the camera with a regular TV/Monitor just
to be sure the stripes aren't created by the camere :)

[Bartek Zdanowski]

Sync doesn't help - no change.

Pal-4.43 makes flickering, so ordinary -pal is the best.

On Mon, Aug 4, 2014 at 8:35 AM, Jeffry Johnston <je...@kidsquid.com> wrote:

--

Pozdrawiam,
Bartek Zdanowski

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[Bartek Zdanowski]

I will check that... after I'll get back from my vacations :D I'm on holidays and during some spare time I do some somagic experiments :)

[Bartek Zdanowski]

Guys,

I've discovered the problem. It was the power source. 

Camera should be powered with 12V DC. My power source had too much AC components. This means that apart from DC current it had AC (sinus) artifacts from mains. That's very common for cheap power sources. Beware of them :)

I've connected 12V battery (from my RC plane!) and the Image is very stable.

https://plus.google.com/photos/103765381777148377623/albums/6043412875128691249/6044012220484385122?banner=pwa&authkey=CJL2lsnN1oilaQ&pid=6044012220484385122&oid=103765381777148377623

Now it's time to check why I have no Image on my raspberry pi. I have raw data from somagic-capture but when I pipe it to mplayer there is no Image. Maybe because of these stripes and some sync errors?

Thanks!

Bartek