v4l2src to support HDMI hotplug

[Liu Xin]

Dear community,


I need help on our product's HDMI input port. We want this feature: when the port is plugged in by a camera, it captures video stream from it, when it's unplugged, it just send a still image to the down stream pipeline. I know certain plugins are suitable for this job, like the diagram I draw below.


filesrc -> jpegdec -> imagefreeze -> input-selector-> downstream

                                                     v4l2src -^


I just don't like the complexity of dealing with hotplug requirement, and wonder if there's better/simpler implementation, or even a single plugin that's just able to do that.


Please share your thoughts, thanks.


Best,

Xin
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