OSS using camerabin

[Thiago Sousa Santos]

	On Fri, 2011-12-02 at 15:31 -0500, Josh Doe wrote:
> On Tue, Nov 29, 2011 at 10:39 PM, Thiago Sousa Santos
> <thiago.sousa.santos at collabora.com> wrote:
> > On Tue, 2011-11-29 at 22:07 -0500, Josh Doe wrote:
> >> I'd like to find OSS using camerabin, or even camerabin2. The only one
> >> I know of is cheese...
> >
> > Cheese has a branch for each of those, indeed. You can also take a look
> > at -bad/examples/camerabin[2] for some code.
> >
> > Are you looking for something specific? Any problems using them?
> 
> I haven't started using it yet, but I was considering it for a simple
> application to capture video and stills from scientific/industrial
> cameras, like GigE Vision (aravis) or Camera Link. I want to be sure
> the raw video is saved without modification (no scaling, colorspace
> conversions, etc.), but because the video is high bit-depth I need to
> apply gain/offset adjustment for viewing purposes (viewfinder). For
> camerabin2 I see the default camerabinsrc does the following:
> 
> videosrc ! cspconv ! srcfilter ! cspconv ! capsfilter ! crop ! scale ! \
> capsfilter ! tee name=t
>    t. ! ... (viewfinder pad)
>    t. ! output-selector name=outsel
>        outsel. ! (image pad)
>        outsel. ! (video pad)
> 
> Without creating a custom camerabinsrc, I'm not sure if I'm guaranteed
> to have unmodified frames sent to the video pad. For performing video
> level adjustment, I think setting my videolevel element (or bin) to
> viewfinder-filter would do the job.

You can either create a custom camerabinsrc or you can add some flags to
the existing one for disabling converters/scalers.

Either way it should be easier than creating and handling a pipeline
yourself.

--
Thiago

> 
> Thanks,
> -Josh
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