User interface for chroma keying (green/blue screen compositing)
Submitted by Jeff F.T.
We need a reusable user interface for picking a color value from the viewer and applying it to the properties of an effect being configured. This will make [[ http://en.wikipedia.org/wiki/Chroma_key | chroma keying ]] much easier.
For example while configuring the White Balance effect applied to a clip, it would be very useful to be able to pick a grey point from the viewer as the "white". Similarly with the color which becomes transparent in Bluescreen0R, etc. See https://docs.google.com/document/d/17P7lSjTaFqyYWZV2NGqBZ_czDA0TvWNPOBQHi6ypFa8 for more examples.
Imported from https://bugzilla.gnome.org/show_bug.cgi?id=634946