{"observation":{"id":"229ebac1-975e-452d-a171-0ebb5b14dc9c","tool":"kapwing","tool_name":"Kapwing","criterion":"temporal-consistency","criterion_name":"Temporal consistency","criterion_definition":"Does the mask flicker or shift between frames, or stay stable across the clip?","criterion_evidence_type":"transformation","criterion_rank_role":"decisive","criterion_rank_role_reason":"Stable masks across frames are essential in video; flicker or shifting means the background removal is visibly broken. (3 of 3 judges)","scenario":"oregon-coast-walking","scenario_name":"Oregon Coast Walking","group_tag":"remove-or-replace-video-backgrounds-using-ai","scenario_description":"A daylight outdoor video of a single person walking along an Oregon coast beach, with the camera following the subject and ocean waves, sand, and sky visible in the background. It was used to test background removal and replacement on a moving subject in a natural outdoor setting.","modality":"video","input_text":null,"input_artifact_refs":[{"alt":null,"url":"https://d3epheqghktydj.cloudfront.net/remove-or-replace-video-backgrounds-usin-input-1-0263564d1ef2.mp4","role":"input","filename":"Input 1.mp4"}],"stresses":["Outdoor background removal","Subject segmentation during movement","Hair and edge preservation","AI background replacement quality"],"verdict":"failed","score":null,"score_total":null,"note":"The Oregon coast export is only stable for the first part of the file; at 0:05.4 it hard-cuts back to untouched beach footage, so the full 10.6-second result is not temporally consistent as one processed clip.","evidence_state":"verified","source":null,"artifacts":[{"url":"https://cdn.futuresmart.ai/public/aidemos/0a33a88a140b4edabc0ce9752426ab0a.mp4?v=1","role":"input","alt":"0a33a88a140b4edabc0ce9752426ab0a.mp4"},{"url":"https://cdn.futuresmart.ai/public/aidemos/163fa485802449be9748daea3b1cfa8a.png?v=1","role":"context","alt":null},{"url":"https://cdn.futuresmart.ai/public/aidemos/1ba88625d813459c93ed0f172ce3802e.png?v=1","role":"context","alt":null},{"url":"https://cdn.futuresmart.ai/public/aidemos/19003f99e3fa4028841a610e4a2cef30.mp4?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-1-0263564d1ef2.mp4","filename":"Input 1.mp4","alt":"Oregon Coast Walking","role":"input"}],"modality":"video","stresses":["Outdoor background removal","Subject segmentation during movement","Hair and edge preservation","AI background replacement quality"]},"tool_page_slug":"kapwing","tool_url":"https://aidemos.com/tools/kapwing","permalink":"https://aidemos.com/evidence/229ebac1-975e-452d-a171-0ebb5b14dc9c","api_url":"https://ai.aidemos.com/v1/observations/229ebac1-975e-452d-a171-0ebb5b14dc9c"},"peers":[{"id":"365c8a87-d849-47f7-aa89-ce99901c4058","tool":"flexclip","tool_name":"FlexClip","verdict":"mixed","score":null,"score_total":null,"note":"The same blue-teal halo is present at multiple sampled timestamps, so the edge defect persists across the clip rather than appearing as a one-frame glitch.","artifact_count":1,"thumbnail":"https://cdn.futuresmart.ai/public/aidemos/d262962121824986bcc6f7ed3b4d1c60.png?v=1","evidence_url":"https://aidemos.com/evidence/365c8a87-d849-47f7-aa89-ce99901c4058"}],"other_criteria":[{"id":"e6362410-8aee-4cfa-a39c-6767ef9f7313","criterion":"edge-quality","criterion_name":"Edge quality","rank_role":"decisive","verdict":"struggled","score":null,"score_total":null,"note":"On the beach silhouette, the cutout edge is soft and fuzzy with a faint greenish fringe around the hood rather than a crisp line.","artifact_count":2,"evidence_url":"https://aidemos.com/evidence/e6362410-8aee-4cfa-a39c-6767ef9f7313"},{"id":"6c4a9e61-0a03-4a1a-8561-2c8e71104184","criterion":"motion-handling","criterion_name":"Motion handling","rank_role":"decisive","verdict":"worked","score":null,"score_total":null,"note":"The tool kept tracking the walking subject through the Oregon coast clip, isolating the person cleanly against white for the processed portion of the walk.","artifact_count":2,"evidence_url":"https://aidemos.com/evidence/6c4a9e61-0a03-4a1a-8561-2c8e71104184"}],"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":"365c8a87-d849-47f7-aa89-ce99901c4058","tool":"flexclip","tool_name":"FlexClip","verdict":"mixed","score":null,"score_total":null,"note":"The same blue-teal halo is present at multiple sampled timestamps, so the edge defect persists across the clip rather than appearing as a one-frame glitch."}]}