Output WebRTCBin to GTK Window using VideoOverlay

[Busayo Famutimi]

Hi Matthew,

This works great. Thanks.

The only problem left is just this issue
<https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/578> to be
fixed. I hope it's resolved in the next stable release.

Thanks.

On Fri, Jul 3, 2020 at 1:01 PM Matthew Waters <ystreet00 at gmail.com> wrote:

> Use a different video sink, or respond the the 'prepare-window-handle'
> message from the actual video sink created by autovideosink (no guarantees
> that all possible video sinks chosen by autovideosink support the
> GstVideoOverlay interface, but most do).  See the documentation or any of
> the overlay examples in gst-plugins-base.
>
> On 3/7/20 9:40 pm, Busayo Famutimi wrote:
>
> Hi Matthew,
>
> Thanks for your response.
>
> However, I am still getting the same error message when I called the
> overlay function on my sink element.
>
>
>>
>> *(webrtc-sendrecv.exe:14920): GLib-GObject-WARNING **: 12:35:52.095:
>> invalid cast from 'GstAutoVideoSink' to 'GstVideoOverlay' **
>> (webrtc-sendrecv.exe:14920): CRITICAL **: 12:35:52.095:
>> gst_video_overlay_set_window_handle: assertion 'GST_IS_VIDEO_OVERLAY
>> (overlay)' failed*
>>
>
> I then looked up the documentation
> <https://gstreamer.freedesktop.org/documentation/autodetect/autovideosink.html?gi-language=c#autovideosink-page>
> and I noticed that autovideosink does not implement the GstVideoOverlay
> interface.
>
> How can I fix this problem?
>
> Thanks.
>
> On Fri, Jul 3, 2020 at 3:01 AM Matthew Waters <ystreet00 at gmail.com> wrote:
>
>> 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.
>>
>> On 3/7/20 6:40 am, Busayo Famutimi wrote:
>>
>> Hi Devs,
>>
>> 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.
>>
>> The code works fine (gstwebrtc-demos - sendrecv.c
>> <https://github.com/centricular/gstwebrtc-demos/blob/master/sendrecv/gst/webrtc-sendrecv.c>).
>> I managed to tweak it to suit my intended purpose but I keep getting the
>> following error:
>>
>>
>>>
>>> *GLib-GObject-WARNING **: 21:14:46.552: invalid cast from 'GstWebRTCBin'
>>> to 'GstVideoOverlay' ** (webrtc-sendrecv.exe:6304): CRITICAL **:
>>> 21:14:46.552: gst_video_overlay_set_window_handle: assertion
>>> 'GST_IS_VIDEO_OVERLAY (overlay)' failed*
>>>
>>
>> The error is coming from this line of the code:
>>
>>>
>>> */* Pass it to playbin, which implements VideoOverlay and will forward
>>> it to the video sink */
>>> gst_video_overlay_set_window_handle(GST_VIDEO_OVERLAY(webrtc1),
>>> window_handle);*
>>>
>>
>> Please how can I handle this situation?
>>
>> Thanks.
>>
>> _______________________________________________
>> gstreamer-devel mailing listgstreamer-devel at lists.freedesktop.orghttps://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>>
>>
>>
>
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