Re: [Bino-list] Possible to use two v4l2 inputs?

[Goetz Dapp]

On 04/05/2012 12:10 PM, Martin Lambers wrote:
> Hi Goetz!
>
> On Thu, 05 Apr 2012 09:38:54 -0600, Goetz Dapp wrote:
>> I was wondering if it is at all possible to add two input devices
>> instead of one for 3D playback and designate them to one perspective,
>> i.e. /dev/video0 = left and /dev/video1 = right, or something along
>> those lines?
> There was an arbitrary limitation for a single device. I just removed
> this, and opening two devices for left/right now works, at least with
> the X11 grabber pseudo device (I don't have any v4l2 devices).
>
> Can you test the latest version from the git repository?
>
> It should be possible to open the video devices from the command line:
> $ bino --device-frame-size=800x600 /dev/video0 /dev/video1
>
> If this works for you, I'll change the GUI dialog to allow this, too.
>
>> It would be awesome if it also were possible to manually adjust some
>> of the v4l2 control ids for these devices.
> Hm, we're going through FFmpeg to open v4l2 devices. What controls
> would you like to adjust? Sorry, I don't know much about v4l2...
>
> Martin
>
Hi Martin,

thanks for your quick reply! I'll compile Bino from git tonight and give
it a shot.

Regarding the v4l2 controls, I am not even sure if that is doable
through ffmpeg. I am using a camera that has an autofocus
(V4L2_CID_FOCUS_AUTO) and auto white balance feature
(V4L2_CID_AUTO_WHITE_BALANCE), which sometimes messes up a video during
recording. There are other controls, too, that might be interesting for
my setup. I was thinking about presetting it, and then turn it off,
hence my question about the controls.

Thanks,
Goetz