Synchronized changes of videoscale and videomixer properties

[Arjen Veenhuizen]

This made me think about a problem I faced a couple of years ago. You could
use GstMetadata to transport the width/height/crop information along with
each frame but this might/will require modification of several elements:
http://gstreamer-devel.966125.n4.nabble.com/videocrop-compositor-Change-output-of-videocrop-just-in-time-using-GstVideoCropMeta-metadata-td4677790.html



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