mixed video background color

[Johan Basore]

Hello everyone,

I composed 2 video streams into one video. So it works well.
But the problem is that the background of mixed video is transparent.
I want a solid black background.
Is there any way?
Here are source codes and screenshots.

***********************************************************
    gst_element_link(source1, decodebin1);
    gst_element_link(source2, decodebin2);
   
    g_signal_connect(decodebin1, "pad-added", G_CALLBACK(on_pad_added_video1), clrspace1);
    g_signal_connect(decodebin2, "pad-added", G_CALLBACK(on_pad_added_video2), clrspace2);

    gst_element_link_many(clrspace1, videoscale1, filter1, videomixer, nil);
    gst_element_link_many(clrspace2, videoscale2, filter2, videomixer, nil);
    gst_element_link_many(videomixer, outfilter, clrspace, h264enc, mpegtsmux, sink, nil);
***********************************************************


Thanks

[Sebastian Dröge-3]

On Do, 2016-05-05 at 22:18 -0700, Johan Basore wrote:
> Hello everyone,
>
> I composed 2 video streams into one video. So it works well.
> But the problem is that the background of mixed video is transparent.
> I want a solid black background.
> Is there any way?
> Here are source codes and screenshots.

compositor has a background property. By default this is set to the
checkerboard pattern you see there, but it can also be set to black,
white and transparent.

(videomixer has the same property, but don't use videomixer)

--
Sebastian Dröge, Centricular Ltd · http://www.centricular.com


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[Johan Basore]

Thanks a lot,
That works well.