Playing around with gstreamer fails strangely

[Nicolas Dufresne]

Le ven. 18 mai 2018 02:57, Paolo Bolzoni <paolo.bolzoni.brown at gmail.com> a
écrit :

> Dear list,
>
> Here is my first tries:
>
> # modprobe --first-time v4l2loopback devices=2 exclusive_caps=0
> # gst-launch-1.0 videotestsrc !  videoconvert   ! v4l2sink
> device=/dev/video1
>
> However this fails (see the error lines in the bottom) and I quite
> confused because I am sure
> in the past I was able to make it work.
>
> I used gst-inspect-1.0 to verify that all caps are fine and everything
> seems correct. What can i try?
>

V4L2loopback is very buggy, and causes random failures. This has been
reported, but no fixes has been made.


> Cheers,
> Paolo
>
>
>
> Setting pipeline to PAUSED ...
> Pipeline is PREROLLING ...
> ERROR: from element
> /GstPipeline:pipeline0/GstVideoTestSrc:videotestsrc0: Internal data
> stream error.
> Additional debug info:
> gstbasesrc.c(3055): gst_base_src_loop ():
> /GstPipeline:pipeline0/GstVideoTestSrc:videotestsrc0:
> streaming stopped, reason not-negotiated (-4)
> ERROR: pipeline doesn't want to preroll.
> Setting pipeline to NULL ...
> Freeing pipeline ...
> _______________________________________________
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> gstreamer-devel at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>
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