On the adaptation of a literary work

I am an amateur and I ask you to forgive me in advance for my amateur not professional reasoning...

I'm not going to discuss the whole broad topic of commonality and difference between a theatrical production and a feature film in general. I just want to discuss this topic for the case when it comes to adapting the original prosaic literary work for a theatrical production or a feature film (TV series).

Please also note that I deliberately chose not to read/study any of the existing (I assume extensive) bibliographies related to the topic - on the contrary, I decided to write about this topic solely based on my amateurish and not professional considerations - considerations of the viewer... - so in advance please forgive me for such courage...

I want to  clarify -  here we are not talking about a specially written play or a screenplay, but about the adaptation, as a source material (without its processing/modification/change) of a literary work (which was not originally intended by the author for theatrical production or film adaptation - that is, a story, novel, novel or novel),  into the genre of theatrical production and/or feature film (as such, or television series - although between the two there is a significant difference in terms of methods and techniques of their implementation on the screen).

Such an adaptation, which should be carried out before the casting and subsequent rehearsals - in the case of theatrical, or filming - in the case of film adaptation, in my opinion, should consist of two main components: visualization and sound.

It is the synchronized unification of these two components that gives rise to the phenomenon of theatrical production (or film/TV series).

The process of planning the methods of implementation of these two components can be carried out either by the writer or directly by the Director (or by these two specialists together).

The first stage of such planning is a thorough analysis of the original literary work - first of all, from the point of view of the decision on its suitability, and then (in the case of suitability), to choose the methods of implementation of visualization and sound.

Planning the visual component consists of:

1) in the case of theatricalization - the implementation of the choice of scenery

2) in the case of screening - the implementation of the choice of the background, that is, the place of filming (taking into account the information in the text of the original work, if any information exists there):

 a) filming on a real nature (city, village, wildlife, etc., etc.))

 b) filming studio, with thoughtful scenery - in the absence of the opportunity to find a suitable real nature, the relevant information given in the original work

  c) combinations of the above two methods

2) choosing the appearance of each of the actors, their clothes, etc., etc.

3) the decision of the choice of "choreography" ("overall drawing" in general, then for each of the actors) - how and in what manner the actors move on stage (or on the scene)

 The planning components of the sound is:

1) to decide (in general, then for each of the actors): in what manner the actors pronounce (voice) directly related to them the text of the original work.

2) to decide how to implement the author's text available in the original work:

 a) splitting of the author's text into parts suitable for the meaning and distribution of the sound of each of these parts to the appropriate actors for these parts.

 b) to decide whether to introduce an "invisible" author's voice (such a decision is less preferable, since it weakens the dynamics of the action and gives this action an undesirable static character).

 c) combinations of the above two methods

After completing the above adaptation process, you can proceed to the selection of actors (casting), and then to rehearsals (in the case of theatricalization) or shooting (in the case of film adaptation.