<div dir="ltr"><div>Hi Matthew,</div><div><br></div><div>Thanks for your response.</div><div><br></div><div>However, I am still getting the same error message when I called the overlay function on my sink element.</div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><b>(webrtc-sendrecv.exe:14920): GLib-GObject-WARNING **: 12:35:52.095: invalid cast from 'GstAutoVideoSink' to 'GstVideoOverlay'<br><br>** (webrtc-sendrecv.exe:14920): CRITICAL **: 12:35:52.095: gst_video_overlay_set_window_handle: assertion 'GST_IS_VIDEO_OVERLAY (overlay)' failed</b></div></blockquote><div><br></div><div>I then looked up the <a href="https://gstreamer.freedesktop.org/documentation/autodetect/autovideosink.html?gi-language=c#autovideosink-page">documentation</a> and I noticed that autovideosink does not implement the GstVideoOverlay interface. <br></div><div><br></div><div>How can I fix this problem?</div><div><br></div><div>Thanks.<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Jul 3, 2020 at 3:01 AM Matthew Waters <<a href="mailto:ystreet00@gmail.com">ystreet00@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
  
    
  
  <div>
    <div>GstVideoOverlay is an interface that is
      implemented by most video sinks.  You need to call
      gst_video_overlay_set_window_handle() on your video sink, not
      webrtcbin.<br>
      <br>
      On 3/7/20 6:40 am, Busayo Famutimi wrote:<br>
    </div>
    <blockquote type="cite">
      
      <div dir="ltr">
        <div>Hi Devs, <br>
        </div>
        <div><br>
        </div>
        <div>I am trying to display a video stream from WebRTCBin to a
          GTK Window using VideoOverlay rather than have gstreamer
          create it's own window.</div>
        <div><br>
        </div>
        <div>The code works fine (<a href="https://github.com/centricular/gstwebrtc-demos/blob/master/sendrecv/gst/webrtc-sendrecv.c" target="_blank">gstwebrtc-demos - sendrecv.c</a>). I
          managed to tweak it to suit my intended purpose but I keep
          getting the following error:</div>
        <div><br>
        </div>
        <blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
          <div><b>GLib-GObject-WARNING **: 21:14:46.552: invalid cast
              from 'GstWebRTCBin' to 'GstVideoOverlay'<br>
              <br>
              ** (webrtc-sendrecv.exe:6304): CRITICAL **: 21:14:46.552:
              gst_video_overlay_set_window_handle: assertion
              'GST_IS_VIDEO_OVERLAY (overlay)' failed</b></div>
        </blockquote>
        <div><b><br>
          </b></div>
        <div>The error is coming from this line of the code:</div>
        <blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
          <div><b>/* Pass it to playbin, which implements VideoOverlay
              and will forward it to the video sink */<br>
                 
              gst_video_overlay_set_window_handle(GST_VIDEO_OVERLAY(webrtc1),
              window_handle);</b></div>
        </blockquote>
        <div><b><br>
          </b></div>
        <div>Please how can I handle this situation?</div>
        <div><br>
        </div>
        <div>Thanks.<br>
        </div>
      </div>
      <br>
      <fieldset></fieldset>
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</pre>
    </blockquote>
    <br>
  </div>

</blockquote></div>