Blocking is the process of planning and choreographing the physical movements of actors, cameras, and other elements within a scene before filming begins. It defines where characters stand, how they move through the space, when they gesture, and how the camera tracks or responds to that movement, creating the visual and spatial logic of the scene.

Good blocking is essential for maintaining continuity, ensuring that eyelines match across cuts, and making sure the camera captures the most emotionally or dramatically relevant moments in each beat of a scene. Directors often work through blocking on set with the cast and crew before shooting, using stand-ins or walkthroughs to plan the exact choreography.

In AI video workflows, the concept of blocking translates into how creators plan and describe the movement of subjects and cameras in their prompts or storyboards. Understanding blocking principles helps creators produce more spatially coherent AI-generated video sequences, particularly when directing multi-character scenes or complex action with defined camera movements.