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

[Edgard Lima]

Hi, Jaap ... it is already fixed on CVS

Thanks Wim

BR
Edgard

Wim Taymans changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|HEAD                        |0.10.15




------- Comment #1 from Wim Taymans  2007-10-15 11:36 UTC -------
        * plugins/elements/gstmultiqueue.c: (gst_single_queue_push_one),
        (gst_single_queue_new):
        * plugins/elements/gstqueue.c: (gst_queue_init),
        (gst_queue_push_one):
        Fix queue negotiation. If acceptcaps unconditionally returns TRUE,
        upstream is tricked into thinking it can suggest a format downstream
        while downstream does not support that format. The real problem
is that
        core calls acceptcaps when pushing a buffer with new caps, for
which we
        do a little workaround by setting the caps on the srcpad ourselves
        before pushing the buffer (until this is figured out). Fixes
#486758.





ext Jaap Haitsma wrote:
> 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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