Error "streaming task paused, reason not-negotiated (-4)" happened

[ShilVin]

Have you implemented "set_info" of GstVideoFilterClass in  splitframe
element. Pipeline negotiation fails if set_info is wrongly implementation or
not doing negotiation properly.

https://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-base-libs/html/GstVideoFilter.html#GstVideoFilterClass

Refer videoconvert code for "set_info" implimentation



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