new_caps callback

[bojan74]

Does exists any callback (signal) that will inform you of any new caps (I am
insteresting of height/width change)?

For example that my own function will be called of every such event?

0:01:01.828657800  7784 0000000003BB5B00 INFO               GST_EVENT
gstevent.c:847:gst_event_new_caps: creating caps event video/x-raw,
format=(string)I420, width=(int)1280, height=(int)720,
interlace-mode=(string)progressive, multiview-mode=(string)mono,
multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono,
pixel-aspect-ratio=(fraction)1/1, chroma-site=(string)mpeg2,
colorimetry=(string)bt709, framerate=(fraction)0/1




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