Flipping the video from webcams

Flipping the video from webcams

[Rainer Koenig]

Hello,

I've got a notebook with an integrated webcam and I got a driver (r5u870) that 
works fine with it, except that the camera images I get are all upside down. 
It seems that due to a desgin flaw the camera was assembled upside down and 
there is no easy way to turn it. So I need to rotate the picture with 
software, which practically means "flip X" and "flip Y". I even found some 
bits in the driver that look like they address this issue, but turning them 
to "1" (instead of 0) doesn't help at all. 

So I wonder: Is there a way to flip the picture that is coming from the camera 
by setting some options somewhere so that my IM client gets the picture in 
the right orientation?

TIA
Rainer
-- 
Rainer Koenig, Diplom-Informatiker (FH), Augsburg, Germany

--
video4linux-list mailing list
Unsubscribe mailto:video4linux-list-request@redhat.com?subject=unsubscribe
https://www.redhat.com/mailman/listinfo/video4linux-list

Re: Flipping the video from webcams

[Thierry Merle]

Hello Rainer,
Rainer Koenig a écrit :
> Hello,
>
> I've got a notebook with an integrated webcam and I got a driver (r5u870) that 
> works fine with it, except that the camera images I get are all upside down. 
> It seems that due to a desgin flaw the camera was assembled upside down and 
> there is no easy way to turn it. So I need to rotate the picture with 
> software, which practically means "flip X" and "flip Y". I even found some 
> bits in the driver that look like they address this issue, but turning them 
> to "1" (instead of 0) doesn't help at all. 
>
> So I wonder: Is there a way to flip the picture that is coming from the camera 
> by setting some options somewhere so that my IM client gets the picture in 
> the right orientation?
>
> TIA
> Rainer
>   
You may put the laptop upside down :)
Seriously, Andreas Demmer reported success on image flipping using
vloopback+camsource.
I think on his blog you will find the information:
http://www.andreas-demmer.de/weblog/beitrag229/
but I don't understand German sadly...

Cheers,
Thierry

--
video4linux-list mailing list
Unsubscribe mailto:video4linux-list-request@redhat.com?subject=unsubscribe
https://www.redhat.com/mailman/listinfo/video4linux-list

Re: Flipping the video from webcams

[Rainer Koenig]

Hi Thierry,

Am Donnerstag, 10. Juli 2008 22:00 schrieb Thierry Merle:
> You may put the laptop upside down :)

;-) Will not be accepted due to a violation of ergonmic principles :-)

> Seriously, Andreas Demmer reported success on image flipping using
> vloopback+camsource.
> I think on his blog you will find the information:
> http://www.andreas-demmer.de/weblog/beitrag229/
> but I don't understand German sadly...

Well I understand German, I tried out but I failed. The strange thing
is that Kopete has no problem to read the video device /dev/video0, but both 
camsource and gqcam fail to read from the device. The camstream log is just 
filled with error messages. I'm afraid that the r5u870 driver (version 
0.11.0, the latest from the site that is donw since this lunchtime :-() is 
not implementing all. v4lctl also shows some error messages when querying or 
trying to capture images.

Thanks for the hint anyway, I'll keep on searching.

Regards
Rainer
-- 
Rainer Koenig, Diplom-Informatiker (FH), Augsburg, Germany

--
video4linux-list mailing list
Unsubscribe mailto:video4linux-list-request@redhat.com?subject=unsubscribe
https://www.redhat.com/mailman/listinfo/video4linux-list

Re: Flipping the video from webcams

[Hans de Goede]

Rainer Koenig wrote:
> Hello,
> 
> I've got a notebook with an integrated webcam and I got a driver (r5u870) that 
> works fine with it, except that the camera images I get are all upside down. 
> It seems that due to a desgin flaw the camera was assembled upside down and 
> there is no easy way to turn it. So I need to rotate the picture with 
> software, which practically means "flip X" and "flip Y". I even found some 
> bits in the driver that look like they address this issue, but turning them 
> to "1" (instead of 0) doesn't help at all. 
> 
> So I wonder: Is there a way to flip the picture that is coming from the camera 
> by setting some options somewhere so that my IM client gets the picture in 
> the right orientation?
> 

Most of the time there are some bits in the sensor which will flip the 
pixelscanorder and thus the image, what sensor does your cam use (OV66xx, 
OV73xx, TAS7XX0, ? )

Regards,

Hans

--
video4linux-list mailing list
Unsubscribe mailto:video4linux-list-request@redhat.com?subject=unsubscribe
https://www.redhat.com/mailman/listinfo/video4linux-list

Re: Flipping the video from webcams

[Rainer Koenig]

Hi Alex,

Am Freitag, 11. Juli 2008 01:56 schrieb Alex Hixon:
> You didn't really mention what version of the driver you're running, an

0.11.0 should be. It was the latest from http://wiki.mediati.org/R5u870
but now this site is not reachable for the moment. 

> on what device, so I can't really help you specifically. In an earlier

Vendor-ID was Ricoh, Device-ID is 1841.

> version of the driver, there was a bug where by default we wouldn't turn
>
> on the V-Flip control by default.

Yes, I saw in the source that for one device-id they had a Default flip.

> You should still just be able to turn on/off the V-Flip control in any
>
> V4L2 application that supports them (eg xawtv).

ACK. Problem is that Kopete doesn't offer flip controls. So I need to find a 
way of flipping the picture in the driver. 

> Also, considering that the r5u870 driver hasn't been merged upstream yet,
>
> you might want to try emailing on the r5u870 list (you can signup at
>
> http://lists.mediati.org). 

Well, I have the things at work, so next possible date to get logs and error 
messges directly from the machine is monday. Maybe by then midiati.org is up 
again. 

Thanks and have a nice weekend
Rainer
-- 
Rainer Koenig, Diplom-Informatiker (FH), Augsburg, Germany

--
video4linux-list mailing list
Unsubscribe mailto:video4linux-list-request@redhat.com?subject=unsubscribe
https://www.redhat.com/mailman/listinfo/video4linux-list