body_swap: subject_definitions: <Subject 1> is the first replacement character shown in <Picture 1>. Its complete appearance defines the replacement for <Subject 3>, including identity, face, head, hair or fur, skin, body shape, proportions, clothing, and distinctive visual features. Details of <Subject 1>: [add first replacement character description here] dark haired anime man in orange blue outfit <Subject 2> is the second replacement character shown in <Picture 2>. Its complete appearance defines the replacement for <Subject 4>, including identity, face, head, hair or fur, skin, body shape, proportions, clothing, and distinctive visual features. Details of <Subject 2>: [add second replacement character description here] batman in a dark hero uniform <Subject 3> is the first original subject in <Video 1> whose entire appearance will be replaced by <Subject 1>, while preserving its original performance, actions, position, and interactions with the environment. Details of <Subject 3>: [describe the first original subject, its position, clothing, or other identifying details] blonde man holding phone <Subject 4> is the second original subject in <Video 1> whose entire appearance will be replaced by <Subject 2>, while preserving its original performance, actions, position, and interactions with the environment. Details of <Subject 4>: [describe the second original subject, its position, clothing, or other identifying details] brunette man wearing blue jacket <Video 1> is the source video for the target edit. It provides the original scene, background, environment, lighting, colors, camera movement, framing, timing, and complete performances of both original subjects, including their interactions with each other and the environment. summary: Create an edited version of <Video 1> by simultaneously performing two independent, complete character appearance replacements: - Replace <Subject 3> with <Subject 1> from <Picture 1>. - Replace <Subject 4> with <Subject 2> from <Picture 2>. Preserve the source video's scene, camera behavior, timing, composition, and both original performances, including body poses, gestures, head motion, gaze, lip movement, facial expressions, and interactions between the two subjects. Maintain strict one-to-one character mapping throughout the entire video. <Subject 1> must exclusively replace <Subject 3>, and <Subject 2> must exclusively replace <Subject 4>. Both replacements must occur simultaneously within the same scene without changing either subject's original role, spatial position, actions, or relationship to the other subject. retention_analysis: <Subject 1>: attribute_transfer — transfer the complete recognizable appearance from <Picture 1> exclusively onto <Subject 3>, including identity, facial structure, head, hair or fur, skin, body shape, proportions, clothing, and distinctive visible features. <Subject 2>: attribute_transfer — transfer the complete recognizable appearance from <Picture 2> exclusively onto <Subject 4>, including identity, facial structure, head, hair or fur, skin, body shape, proportions, clothing, and distinctive visible features. <Subject 3>: performance_preserved — replace the first original subject's appearance with <Subject 1> while preserving its original position, body poses, gestures, movement, head rotation, gaze, lip movement, expressions, and interactions with <Subject 4> and the environment. <Subject 4>: performance_preserved — replace the second original subject's appearance with <Subject 2> while preserving its original position, body poses, gestures, movement, head rotation, gaze, lip movement, expressions, and interactions with <Subject 3> and the environment. <Video 1>: scene_and_motion_preserved — preserve the original background, environment, lighting, colors, camera movement, framing, timing, scene composition, spatial relationships, and temporal structure. Modify only the appearances of the two designated original subjects. character_mapping: strict_identity_assignment — maintain the exclusive mappings <Subject 3> → <Subject 1> and <Subject 4> → <Subject 2> throughout every frame. Never exchange, merge, blend, or transfer visual attributes between the two replacement identities. detailed_description: Preserve <Video 1> as the temporal, performance, camera, lighting, and compositional foundation of the output. Perform two independent character replacements simultaneously, retaining the exact original performances and spatial relationships of both subjects. FIRST CHARACTER REPLACEMENT: Replace the complete appearance of <Subject 3> with <Subject 1> from <Picture 1>, including face, head, hair or fur, skin, body shape, proportions, clothing, and distinctive features. <Subject 1> must occupy the exact original position of <Subject 3> and reproduce its performance frame by frame, including posture, body poses, arm and hand movements, gestures, actions, head translation and rotation, gaze direction, blinking, lip movement, speech timing, and facial expressions. Use <Picture 1> exclusively as the appearance reference for <Subject 1>. Do not transfer its background, environment, camera angle, pose, or unrelated visual elements into the output. SECOND CHARACTER REPLACEMENT: Replace the complete appearance of <Subject 4> with <Subject 2> from <Picture 2>, including face, head, hair or fur, skin, body shape, proportions, clothing, and distinctive features. <Subject 2> must occupy the exact original position of <Subject 4> and reproduce its performance frame by frame, including posture, body poses, arm and hand movements, gestures, actions, head translation and rotation, gaze direction, blinking, lip movement, speech timing, and facial expressions. Use <Picture 2> exclusively as the appearance reference for <Subject 2>. Do not transfer its background, environment, camera angle, pose, or unrelated visual elements into the output. IDENTITY SEPARATION AND CONSISTENCY: Maintain two completely separate and independently recognizable character identities throughout the video. <Subject 1> must retain the facial structure, hair or fur, skin, body shape, proportions, clothing, and distinctive features defined by <Picture 1>. <Subject 2> must retain the facial structure, hair or fur, skin, body shape, proportions, clothing, and distinctive features defined by <Picture 2>. Do not exchange faces, hairstyles, clothing, body features, skin textures, or any other appearance attributes between the two replacement characters. Prevent identity crossover, character swapping, facial blending, appearance merging, and accidental transfer of either reference character's features onto the wrong subject. Each replacement character must remain consistently associated with its designated original subject, even when the subjects approach each other, overlap, cross paths, change positions within the frame, interact physically, or partially occlude one another. Maintain stable identity assignments during camera movement, viewpoint changes, head rotation, facial expressions, motion blur, and temporary occlusion. Do not duplicate either replacement character or introduce additional subjects. PERFORMANCE AND INTERACTION PRESERVATION: Preserve both original performances independently and simultaneously. Maintain each subject's exact body positioning, movement timing, gestures, posture, gaze direction, head motion, lip movement, speech timing, and facial expressions. Preserve the original distance, relative scale, orientation, and spatial relationship between both subjects. Maintain all interactions between the two subjects, including eye contact, physical contact, gestures directed toward one another, overlapping movements, and coordinated actions. Preserve each subject's original interactions with objects, surfaces, props, and the surrounding environment. Do not transfer movements, gestures, facial expressions, or performance characteristics from one subject to the other. Each replacement must follow only the performance of its corresponding original subject. VISUAL INTEGRATION: Adapt both replacement characters naturally and independently to the lighting and photographic conditions of <Video 1>, including illumination direction, shadows, highlights, exposure, color temperature, depth of field, motion blur, occlusion, camera angle, and perspective. Preserve natural anatomy, body proportions, and physical plausibility while matching the original performances. Maintain realistic depth ordering and occlusion whenever the two characters overlap, cross in front of one another, or interact with environmental objects. Preserve appropriate contact shadows, lighting continuity, perspective, and visual integration for both characters. Use the reference pictures only to define the corresponding characters' appearances. Do not import their original backgrounds, lighting arrangements, poses, camera framing, or unrelated visual content. TEMPORAL CONSISTENCY: Maintain strong temporal consistency for both replacement characters throughout every frame. Prevent identity drift, reference contamination, blending with either original subject's appearance, facial or body morphing, clothing changes, proportion fluctuations, malformed anatomy, duplicate features, texture crawling, flickering, and sudden frame-to-frame changes. Prevent identity crossover between <Subject 1> and <Subject 2>, especially during overlapping movement, close physical interaction, partial occlusion, or changes in screen position. Keep both characters' facial structures, clothing, body proportions, hair or fur, skin textures, and distinctive features stable throughout the entire sequence. Preserve the original temporal structure and motion continuity of <Video 1>. Do not introduce new blinking, gestures, facial movements, head movements, body movements, or background animation absent from the source video. Do not introduce artificial motion into otherwise static subjects or environmental elements. SCENE PRESERVATION: Do not modify the background, environment, objects, camera trajectory, framing, lens behavior, scene timing, lighting arrangement, or overall composition inherited from <Video 1>. Do not change the number of subjects, their original positions, their actions, or their relationships within the scene. Modify only the complete visual appearances of <Subject 3> and <Subject 4> according to their respective character references. The result should appear as though <Subject 1> and <Subject 2> naturally performed the exact respective actions originally recorded by <Subject 3> and <Subject 4> in <Video 1>, together in the same uninterrupted scene. overall_soundscape: N/A non_diegetic_music: N/A