What happens in the Pre production, Production and Post production stage

Research-what happens in each stage of the production process

Pre-production

Production

Post production

Pre production stage-This is the planning stage where the preparation of making the film starts and the cast and actors are hired to play specific roles. In this stage the script is written and ideas for the film are created. During pre-production, the script is broken down into individual scenes storyboards so everything is planned out in every detail. The locations, props, cast members; costumes, special effects and visual effects are identified. At some point in pre-production there will be a read-through of the script which is usually attended by all cast members with speaking parts, the director, all heads of departments, financiers, producers, and publicists.They prepare a Treatment, a 25-to-30-page description of the story, its mood, and characters. This usually has little dialogue and stage director, but often contains drawings that help visualize key points. Another way is to produce a scriptwriter once a synopsis is produced. The different roles in the pre production stage are the storyboard artist, Director,Assistant director, Unit production manager, location manager, production designer, costume director, casting director, art director, director of photography, director of autobiography, production sound mixture and more.

The production stage- the actual filming/ shooting for the film stats and in this stage more crew is recruited such as directors, photographers, sound editors and more. A typical day of the production stage begins when the crew arrives for the shooting of the set and actors have their own separate time to come and act.  Also in this stage, the actors are costumed into their outfits, makeup and lighting is set up. The assistant director calls "picture is up!" to inform everyone that a take is about to be recorded, and then "quiet, everyone!" Once everyone is ready to shoot, the AD calls "roll sound" (if the take involves sound), and the production sound mixture will start their equipment, record a verbal slate of the take's information, and announce "sound speed", or just "speed" when they are ready. The AD follows with "roll camera", answered by "speed!" by the camera operator once the camera is recording. The clapper, who is already in front of the camera with the clapperboard, calls "marker!" and slaps it shut. If the take involves extras or background action, the AD will cue them ("action background!"), and last is the director, telling the actors "action!". The AD may echo "action" louder on large sets.

Post production stage- here is the editing stage of the film where the film is assembled by the film editor. Moreover, the dialogue is edited as well as the soundtrack and songs are recorded and special effects, sound effects and any finishing touches are applied such as any computer-graphic visual effects are digitally added. The final part is when the sound elements are mixed into "stems", which are then married to picture, and the film is fully completed ("locked").

• Video the picture of a television programme using an edit decision list
• Writing, (re-recording), and editing the soundtrack.
• Adding visual special effects - mainly  (CGI) and digital copy from which release prints will be made (although this may be made obsolete by digital-cinema technologies).
• Sound design , Sound effects, ADR. and Music, culminating in a process known as sound re-recording or mixing with professional audio equipment.
• Transfer of Color motion picture to video or DPX  with a telegenic and color grading (correction) in a color suite 

Source http://en.wikipedia.org/wiki/Pre-production