[maemo-developers] V4L2 and Gstreamer

[From: Martin Grimme]

Hi,

V4L2 interfaces work. Make sure that your software doesn't try to use
V4L, though.
I have written a library directly controlling the FM radio chip in the
N800 via the V4L2 kernel interface and it worked as expected.


Regards,
Martin


2009/1/10, Shu Shi <shushi2 at illinois.edu>:
> Actually, I am using opencv to run some eye tracking app in Nokia
> N800. So I try to use the camera capture interface in opencv rather
> than writing a new one with gstreamer (instructed in the menual) by
> myself.
>
> The camera capture code in opencv does try to set the camera's
> resolution. By crossing out that code, now it works!
>
> Thanks for the help!
>
> Best,
> Shu
>
> On Fri, Jan 9, 2009 at 5:12 PM, Kees Jongenburger
> <kees.jongenburger at gmail.com> wrote:
>> Hello Shu,
>>
>> On Fri, Jan 9, 2009 at 11:20 PM, Shu Shi <shushi2 at illinois.edu> wrote:
>>> Hi everyone,
>>>
>>> I am working on a N800/OS2008 application which captures and video and
>>> analyzes the content. I need to write or re-use some codes to capture
>>> the video through camera. According to the documentation, it says that
>>> V4L2 is supported in kernel but the whole system is based on Gstreamer
>>> framework. I also tried some open source software using V4L/V4L2 to
>>> control camera, such as opencv, spcaview, but all failed.
>>
>> It can be hard to request the right resolution etc.
>>
>>>
>>> My questions are:
>>> 1. Can I use V4L2 interface to control camera directly in N800/OS2008?
>>> Or everything is controled by Gstreamer?
>> You can use the interface directly. just like gstreamer does
>>
>>> 2. If V4L2 can be used, is there anything special in this platform I
>>> need to pay attention to?
>>> 3. If everything is controlled by Gstreamer, is there any sample codes
>>> to control camera I could reference?
>>
>> The Maemo reference manual has a nice section about this called
>> "Camera Manipulation in C Language "
>> see
>> http://maemo.org/maemo_release_documentation/maemo4.1.x/node9.html#SECTION00930000000000000000
>>
>>
>> greetings
>>
>
>
>
> --
> Shu Shi
> System Research Group
> Department of Computer Science
> University of Illinois at Urbana-Champaign
>
> Zsa Zsa Gabor  - "I'm a great housekeeper. I get divorced. I keep the
> house."
> _______________________________________________
> maemo-developers mailing list
> maemo-developers at maemo.org
> https://lists.maemo.org/mailman/listinfo/maemo-developers
>