{"observation":{"id":"69240bb5-8766-4fbb-9a67-aa46dbf15bc4","tool":"descript","tool_name":"Descript","criterion":"lighting-adaptation","criterion_name":"Lighting adaptation","criterion_definition":"Does the replaced background look naturally lit relative to the subject, or obviously composited?","criterion_evidence_type":"transformation","criterion_rank_role":"decisive","criterion_rank_role_reason":"If the replaced background does not match the subject’s lighting, the composite looks fake, so this is central to replacement quality. (3 of 3 judges)","scenario":"indoor-talking-head","scenario_name":"Indoor Talking Head","group_tag":"remove-or-replace-video-backgrounds-using-ai","scenario_description":"An indoor talking-head video of a person speaking directly to the camera with a static background, natural hand gestures, and facial expressions. It was used to test how well tools preserve the subject while replacing an indoor background.","modality":"video","input_text":null,"input_artifact_refs":[{"alt":null,"url":"https://d3epheqghktydj.cloudfront.net/remove-or-replace-video-backgrounds-usin-input-2-0e8b7fa1a596.mp4","role":"input","filename":"Input 2.mp4"}],"stresses":["Static camera performance","Face and body segmentation","Facial expression preservation","Background replacement accuracy in an indoor environment"],"verdict":"struggled","score":null,"score_total":null,"note":"The subject keeps flat neutral lighting instead of picking up the new room’s warm or cool color spill, so the composite reads less naturally lit.","evidence_state":"verified","source":null,"artifacts":[{"url":"https://cdn.futuresmart.ai/public/aidemos/eb875ef472994019aff68a45d691afb2.png?v=1","role":"output","alt":null}],"run_id":"10155228-7ce8-438a-a210-547331ef080b","study_title":"Remove or Replace Video Backgrounds Using AI","study_kind":"generation","research_task":"86ba42c2d","tested_at":null,"completeness":"input-and-output","input":{"state":"files","text":null,"files":[{"url":"https://d3epheqghktydj.cloudfront.net/remove-or-replace-video-backgrounds-usin-input-2-0e8b7fa1a596.mp4","filename":"Input 2.mp4","alt":"Indoor Talking Head","role":"input"}],"modality":"video","stresses":["Static camera performance","Face and body segmentation","Facial expression preservation","Background replacement accuracy in an indoor environment"]},"tool_page_slug":"descript","tool_url":"https://aidemos.com/tools/descript","permalink":"https://aidemos.com/evidence/69240bb5-8766-4fbb-9a67-aa46dbf15bc4","api_url":"https://ai.aidemos.com/v1/observations/69240bb5-8766-4fbb-9a67-aa46dbf15bc4"},"peers":[{"id":"2176350b-7bf3-4457-a943-e84786bd3cc9","tool":"media-io","tool_name":"Media.io","verdict":"struggled","score":null,"score_total":null,"note":"The replacement scene looked coherent, but the subject kept flat neutral source lighting against the moody studio backdrop, with no grounding shadow and a monitor element colliding with the hair silhouette.","artifact_count":6,"thumbnail":"https://cdn.futuresmart.ai/public/aidemos/4e8c31f2e57a455b9933e73a6671f251.png?v=1","evidence_url":"https://aidemos.com/evidence/2176350b-7bf3-4457-a943-e84786bd3cc9"}],"other_criteria":[{"id":"815ae4c3-0847-4305-8534-499da85fa491","criterion":"edge-quality","criterion_name":"Edge quality","rank_role":"decisive","verdict":"struggled","score":null,"score_total":null,"note":"The shoulder matte is feathered and desaturated compared with the surrounding fabric, leaving a visible rough cutout edge.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/815ae4c3-0847-4305-8534-499da85fa491"},{"id":"636fb6c4-509b-4576-8679-cdaf9b56177a","criterion":"hair-and-fine-detail","criterion_name":"Hair and fine detail","rank_role":"decisive","verdict":"struggled","score":null,"score_total":null,"note":"Fine hair detail softens into a halo/blur band around the crown and sides, and flyaway strands are lost against the new background.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/636fb6c4-509b-4576-8679-cdaf9b56177a"},{"id":"74e15c82-514d-483b-bce2-15ba2a3e9488","criterion":"output-resolution","criterion_name":"Output resolution","rank_role":"context","verdict":"failed","score":null,"score_total":null,"note":"It converts a 3840×2160 landscape source into a 720×1280 portrait export, changing orientation as well as downscaling.","artifact_count":2,"evidence_url":"https://aidemos.com/evidence/74e15c82-514d-483b-bce2-15ba2a3e9488"}],"appears_in":[{"page_type":"ranking","slug":"video-background-removers","title":"Best AI Tools to Remove or Replace Video Backgrounds with AI","url":"https://aidemos.com/best/video-background-removers","binding":"run"}],"same_scenario":[{"id":"2176350b-7bf3-4457-a943-e84786bd3cc9","tool":"media-io","tool_name":"Media.io","verdict":"struggled","score":null,"score_total":null,"note":"The replacement scene looked coherent, but the subject kept flat neutral source lighting against the moody studio backdrop, with no grounding shadow and a monitor element colliding with the hair silhouette."}]}