uvch264src element fails to work with two C920 devices

[Juan Robles]

Hi,

That's weird, since I have both cameras working on the same device using
cvlc.
In this case, the only difference is that with cvlc I can't request a
specific bitrate and fallbacks to the default, but otherwise, it works
flawlessly.

Isn't it meaningful that having an uvch264src0 it should map to v4l2src0
and the second one, uvch264src1 should map to v4l2src1?

Anyway, tomorrow I'll be attaching them to another device with two usb
buses and see if that makes a difference.


2014-09-23 23:18 GMT+02:00 Adrian Pardini <listas at tangopardo.com.ar>:

> On 23 September 2014 18:11, Juan Robles <filosangrante at gmail.com> wrote:
> > Hi,
> >
> > I'm trying to test the capture using two C920 cameras and it doesn't
> work.
> > It seems to me that the second pipeline using the uvch264src element is
> > being mapped to v4l2src0 instead of to v4l2src1, or at leas that's what I
> > get from this line in the second pipeline that uses the second camera:
> >
> > gstv4l2bufferpool.c(994): gst_v4l2_buffer_pool_poll ():
> > /GstPipeline:pipeline0/GstUvcH264Src:video1/GstV4l2Src:v4l2src0:
> > poll error 1: No space left on device (28)
> >
> > Any ideas?
>
>
> Hi Juan,
>
> that error means that there is not enough bandwidth on your usb
> controller to have simultaneous capture. You can try plugging one of
> the cameras on another controller or add another if that is an option
> on your system.
>
> There are some messages here and on the linux-uvc list about these
> cameras, for some combinations of resolution and format they ask for
> more bandwidth than what appears necessary.
> _______________________________________________
> gstreamer-devel mailing list
> gstreamer-devel at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/gstreamer-devel/attachments/20140923/fc912311/attachment.html>