[gst-devel] Another weird difference [Re: v4l2src not working when pipeline is placed in a bin, but it works for videotestsrc]

[Jaap Haitsma]

Hi,

I just found another weird difference (happening in CVS and latest stable

If I run the following pipeline:

gst-launch v4l2src ! ffmpegcolorspace ! queue  ! ximagesink

and try to change the window size gstreamer crashes:

ERROR: from element /pipeline0/v4l2src0: Internal data flow error.
Additional debug info:
gstbasesrc.c(1816): gst_base_src_loop (): /pipeline0/v4l2src0:
streaming task paused, reason not-negotiated (-4)

If I replace v4l2src with videotestsrc it works fine. Also if I change
the pipeline to

gst-launch v4l2src ! ffmpegcolorspace ! queue  ! identity ! ximagesink

it works fine.

Is this a bug or something that can be explained with how gstreamer works

Jaap

PS I need the queue because I'm writing an application where I need to
tee the video stream. The above pipelines


On 10/9/07, Tim Müller <t.i.m at zen.co.uk> wrote:
>
> On Sun, 2007-10-07 at 18:32 +0200, Jaap Haitsma wrote:
>
> > I'm having trouble getting a v4l2src (a webcam) to work when it's part
> > of a bin and subsequently placed in a pipeline the attached code is a
> > minimal example, where it occurs. (put Makefile and gst-bin-test.c in
> > a directory and run make)
> > ...
> > Any ideas what I'm doing wrong here? Or is this a bug?
>
> I can reproduce the problem with core/base 0.10.14 and v4l2src from CVS.
> Works fine with core/base from CVS though, so I guess whatever it was
> it's been fixed now.
>
>  Cheers
>   -Tim
>
>
>
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