GstInterpolationControlSource @GST_INTERPOLATE_NONE: @GST_INTERPOLATE_TRIGGER: @GST_INTERPOLATE_LINEAR: @GST_INTERPOLATE_QUADRATIC: @GST_INTERPOLATE_CUBIC: @GST_INTERPOLATE_USER: @Returns: @self: @timestamp: @value: @Returns: @self: @timedvalues: @Returns: @self: @mode: @Returns: @self: @Returns: @self: @timestamp: @Returns: @self: @self: @Returns: