gstreamer video device not found

[Chuck Crisler]

Video for Linux (V4L) is not able to recognise whatever (if anything) you
have connected to /dev/video0. If you have some input video device
connected, maybe you don't have a V4L driver.

On Fri, Jul 27, 2012 at 7:17 AM, Mazahir Poonawalla <
mazahir.poonawalla at ideaforge.co.in> wrote:

> Hi,
>
> I tried running an example plugin on leopardboard:
>
> gst-launch -v -e v4l2src always-copy=FALSE input-src=composite
> chain-ipipe=true ! video/x-raw-yuv,format=\(fourcc\)NV12, width=1280,
> height=720 ! queue ! dmaiaccel ! dmaienc_h264 encodingpreset=2
> ratecontrol=2 intraframeinterval=23 idrinterval=46 targetbitrate=3000000 !
> rtph264pay ! udpsink port=$PORT host=$HOST_ADDR sync=false
> enable-last-buffer=false
>
> I also tried the example mentioned in
> www.ridgerun.com/.../LeopardBoard_365_GStreamer_Pipelines_-_SDK_2011Q2<https://www.ridgerun.com/developer/wiki/index.php/LeopardBoard_365_GStreamer_Pipelines_-_SDK_2011Q2>
>  :
>
> gst-launch -e v4l2src always-copy=FALSE input-src=composite
> chain-ipipe=true ! video/x-raw-yuv,format=\(fourcc\)NV12, width=1280,
> height=720, framerate=\(fraction\)23/1 ! queue ! dmaiaccel ! dmaienc_h264
> encodingpreset=2 ratecontrol=2 intraframeinterval=23 idrinterval=46
> targetbitrate=3000000 ! rtph264pay ! udpsink port=$PORT host=$HOST_ADDR
> sync=false enable-last-buffer=false &
>
> But I keep getting the error as below:
>
> Setting pipeline to PAUSED ...
>
> davinci_resizer davinci_resizer.2: RSZ_G_CONFIG:0:1:124
>
> ERROR: Pipeline doesn't want to pause.
>
> ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Cannot
> identify device '/dev/video0'.
>
> Additional debug info:
>
> ../../../src/sys/v4l2/v4l2_calls.c(573): gst_v4l2_open ():
> /GstPipeline:pipeline0/GstV4l2Src:v4l2src0:
>
> system error: No such file or directory
>
> Setting pipeline to NULL ...
>
> Freeing pipeline ...
>
> Can someone please help as to what is going wrong?
>
> --
>
> Thank you & Regards,****
>
> *Mazahir Poonawalla*****
>
>
>
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>
>
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