Gets or sets the timecode source playback option being editted.
Namespace: Playbacks.OptionsEditor.SingleSelection
ActionScript.SetProperty(Playbacks.OptionsEditor.SingleSelection.TimecodeSource,[value])
http://[ip]:4430/titan/get/2/Playbacks/OptionsEditor/SingleSelection/TimecodeSource
POST /titan/set/2/Playbacks/OptionsEditor/SingleSelection/TimecodeSource