Critical Error reading RTSP stream from IP cameras

[Mark Howell]

On 01/22/2018 04:36 AM, Jajoo, Malhar wrote:
>
> Hi,
>
>
> I am using*sricam SP019* IP(Wireless) camera.
> I have been able to find the RTSP URL for my camera: 
> ("rtsp://IP_ADDRESS:554/onvif1").
> However, I am unable to open the RTSP stream using openCV VideoCapture 
> interface.
>
> *Already tried ( and didn't help much )-*
>
>  1. I have posted in the openCV forum but have not received any reply yet.
>
>  2. Tried the BigBuckBunny RTSP URL from website
>     (https://www.wowza.com/html/mobile.html)
>     *and it works using openCV cv::VideoCapture().
>
>     *
>  3. I managed to play my IP cameras RTSP stream in VLC and the onvifer
>     Android app provided.
>
>     The app also provided the following info -
>      - Encoding: H264
>      - Transport Protocol: RTP/RTSP/TCP
>      - RTSP port: 554
>
>
>  4. I have also recompiled openCV from scratch enabling gstreamer and
>     ffmpeg Cmake Flags (-D WITH_GSTREAMER=ON and -D WITH_FFMPEG=ON).
>
>
>
> However, I still keep getting the*error* shown: *GLib-GObject-CRITICAL 
> **: g_object_set: assertion 'G_IS_OBJECT (object)' failed*
>
>
> *My question*:
> It would be extremely helpful if someone could give a hint as to 
> what's causing the error.
>
> Thanks!
>
>
>
> _______________________________________________
> gstreamer-devel mailing list
> gstreamer-devel at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel

1) Try playing the RTSP stream in something like VLC (videolan.org) to 
make sure the camera is working


2) Try using gst-launch-1.0 at the command line to build a pipeline that 
plays your camera stream with just GStreamer; this would isolate it from 
any OpenCV issues (for which you may not find much help here).


something like:


$ gst-launch-1.0 -v rtspsrc location=rtsp://IP_ADDRESS:554/onvif1 ! 
rtph264depay ! avdec_h264 ! videoconvert ! xvimagesink


there are also more automatic/portable ways to do that with playbin, e.g.:


gst-launch-1.0 -v playbin uri=rtsp://IP_ADDRESS:554/onvif1


Cheers,


Mark.

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