{"observation":{"id":"d6908633-cc10-4226-a694-a0844b8ab837","tool":"sync-labs","tool_name":"Sync Labs","criterion":"lip-sync-accuracy","criterion_name":"Lip Sync Accuracy","criterion_definition":"Does the dubbed audio visually match lip movements in the original video?","criterion_evidence_type":"transformation","criterion_rank_role":"decisive","criterion_rank_role_reason":"If the dubbed audio does not match the on-screen mouth movements, the core purpose of video translation with lip sync has failed. (3 of 3 judges)","scenario":"hindi-vlog-style-talking-head-hindi-english","scenario_name":"Hindi vlog-style talking head (Hindi → English)","group_tag":"video-translation-voice-clone-lip-sync","scenario_description":"A casual Hindi/Hinglish talking-head or vlog-style creator video translated into English to stress informal language handling, slang, and natural-sounding voice cloning on real creator content.","modality":"video","input_text":null,"input_artifact_refs":[],"stresses":[],"verdict":"worked","score":null,"score_total":null,"note":"Lip sync performed better on the slower speech, though a slight lag in lip movement was still visible.","evidence_state":"verified","source":"first-party","artifacts":[{"url":"https://d3epheqghktydj.cloudfront.net/sync-labs-input-2-educational.mp4","role":"input","alt":"Sync Labs — Input 2 Educational.mp4"},{"url":"https://d3epheqghktydj.cloudfront.net/sync-labs-sync-video.mp4","role":"output","alt":"Sync Labs — sync-video.mp4"}],"run_id":"9feca581-b454-4bda-a610-a646cd0092f0","study_title":"Translate Videos with Voice Cloning and Lip Sync Using AI","study_kind":"backfill","research_task":"86b96dfpf","tested_at":"2026-06-24T05:45:24.018000+00:00","completeness":"input-and-output","input":{"state":"not-captured","text":null,"files":[],"modality":"video","stresses":[]},"tool_page_slug":"sync-labs","tool_url":"https://aidemos.com/tools/sync-labs","permalink":"https://aidemos.com/evidence/d6908633-cc10-4226-a694-a0844b8ab837","api_url":"https://ai.aidemos.com/v1/observations/d6908633-cc10-4226-a694-a0844b8ab837"},"peers":[{"id":"d29db857-29b4-4b28-9e92-85d3759bd67f","tool":"d-id","tool_name":"D-ID","verdict":"failed","score":null,"score_total":null,"note":"Lip sync worked well on the AI avatar, but it did not apply to the original video.","artifact_count":1,"thumbnail":"https://d3epheqghktydj.cloudfront.net/d-id-d-id-educationalvideo-en-es-mp4.mp4","evidence_url":"https://aidemos.com/evidence/d29db857-29b4-4b28-9e92-85d3759bd67f"},{"id":"208b6f87-9f13-44c4-9f3c-652edc37f2c7","tool":"dubverse","tool_name":"Dubverse","verdict":"mixed","score":null,"score_total":null,"note":"Lip sync is good on slow to medium speech, but fast instruction segments show a slight delay.","artifact_count":1,"thumbnail":"https://d3epheqghktydj.cloudfront.net/dubverse-hindi-dubverse-ai.mp4","evidence_url":"https://aidemos.com/evidence/208b6f87-9f13-44c4-9f3c-652edc37f2c7"},{"id":"19111e13-9d4e-4f30-8535-be7a2d3b92c9","tool":"elevenlabs","tool_name":"ElevenLabs","verdict":"failed","score":null,"score_total":null,"note":"No lip-sync feature was provided, so the dubbing could not automatically match the original Hindi mouth movements.","artifact_count":2,"thumbnail":"https://d3epheqghktydj.cloudfront.net/elevenlabs-free-copyright-stock-videos-images-and-music-publer-com-online-video-cutter-com.mp4","evidence_url":"https://aidemos.com/evidence/19111e13-9d4e-4f30-8535-be7a2d3b92c9"},{"id":"9640f541-5757-44ef-b97a-4acbf459fe62","tool":"heygen","tool_name":"Heygen","verdict":"struggled","score":null,"score_total":null,"note":"Lip sync becomes noticeably less accurate and falls out of alignment in some sections.","artifact_count":1,"thumbnail":"https://d3epheqghktydj.cloudfront.net/heygen-free-copyright-stock-videos-images-and-music-publer-com-online-video-cutter-com.mp4","evidence_url":"https://aidemos.com/evidence/9640f541-5757-44ef-b97a-4acbf459fe62"},{"id":"2ca9115f-592f-404b-ba23-8b8340c23781","tool":"rask-ai","tool_name":"Rask AI","verdict":"mixed","score":null,"score_total":null,"note":"Keeps lip sync fairly close on the original speaker, but minor mismatches appear in fast-speech sections.","artifact_count":1,"thumbnail":"https://d3epheqghktydj.cloudfront.net/rask-ai-input-1-fitness-video-online-video-cutter-com.mp4","evidence_url":"https://aidemos.com/evidence/2ca9115f-592f-404b-ba23-8b8340c23781"}],"other_criteria":[{"id":"ce3817d3-7f02-4421-b913-cec7bfce930f","criterion":"automation-level","criterion_name":"Automation Level","rank_role":"context","verdict":"worked","score":null,"score_total":null,"note":"The workflow was medium to high automation: after upload, the translation and dubbing pipeline ran automatically.","artifact_count":2,"evidence_url":"https://aidemos.com/evidence/ce3817d3-7f02-4421-b913-cec7bfce930f"},{"id":"3c479759-e41e-4081-8cad-2a2433c9d3f5","criterion":"automation-level","criterion_name":"Automation Level","rank_role":"context","verdict":"worked","score":null,"score_total":null,"note":"Automation was high after upload, with the rest of the dubbing pipeline handled by the tool.","artifact_count":2,"evidence_url":"https://aidemos.com/evidence/3c479759-e41e-4081-8cad-2a2433c9d3f5"},{"id":"e34bf080-b768-457e-b1a9-b7a59bf0097a","criterion":"automation-level","criterion_name":"Automation Level","rank_role":"context","verdict":"mixed","score":null,"score_total":null,"note":"After the video is uploaded, the speech → translation → lip-sync pipeline is automated, but the report still rates the overall workflow as medium to high because input preparation remains manual.","artifact_count":2,"evidence_url":"https://aidemos.com/evidence/e34bf080-b768-457e-b1a9-b7a59bf0097a"},{"id":"1ba3da0b-5685-493b-b2aa-1f68acc300a7","criterion":"input-handling","criterion_name":"Input Handling","rank_role":"context","verdict":"worked","score":null,"score_total":null,"note":"The Hindi video processed after manual upload, and the report says the tool supports multilingual input including Hindi.","artifact_count":2,"evidence_url":"https://aidemos.com/evidence/1ba3da0b-5685-493b-b2aa-1f68acc300a7"},{"id":"a557c540-3de3-4075-9c23-433f8ca3fe6f","criterion":"translation-accuracy","criterion_name":"Translation Accuracy","rank_role":"decisive","verdict":"mixed","score":null,"score_total":null,"note":"English translation is mostly correct, but the casual vlog tone is not preserved and the result feels slightly stiff.","artifact_count":2,"evidence_url":"https://aidemos.com/evidence/a557c540-3de3-4075-9c23-433f8ca3fe6f"},{"id":"b2f82256-bf7c-46bd-878d-336dd1763ae1","criterion":"translation-accuracy","criterion_name":"Translation Accuracy","rank_role":"decisive","verdict":"worked","score":null,"score_total":null,"note":"The Spanish translation was accurate and clear, especially for structured educational speech.","artifact_count":2,"evidence_url":"https://aidemos.com/evidence/b2f82256-bf7c-46bd-878d-336dd1763ae1"},{"id":"70b46cd9-20d5-4e97-ba38-ee59b892e13d","criterion":"translation-accuracy","criterion_name":"Translation Accuracy","rank_role":"decisive","verdict":"mixed","score":null,"score_total":null,"note":"English→Hindi translation is moderately accurate on fast, energetic speech, so the meaning is mostly preserved but not fully robust.","artifact_count":2,"evidence_url":"https://aidemos.com/evidence/70b46cd9-20d5-4e97-ba38-ee59b892e13d"},{"id":"bead9274-86a1-4fd8-baed-0d825fc80f45","criterion":"translation-accuracy","criterion_name":"Translation Accuracy","rank_role":"decisive","verdict":"worked","score":null,"score_total":null,"note":"English→Spanish translation is accurate and clear on structured educational narration.","artifact_count":2,"evidence_url":"https://aidemos.com/evidence/bead9274-86a1-4fd8-baed-0d825fc80f45"},{"id":"9b180883-0490-490d-873e-65b64726755c","criterion":"voice-cloning-quality","criterion_name":"Voice Cloning Quality","rank_role":"decisive","verdict":"mixed","score":null,"score_total":null,"note":"The dubbed voice is decent but still sounds AI-like and less natural than ElevenLabs, so the speaker match is only moderate.","artifact_count":2,"evidence_url":"https://aidemos.com/evidence/9b180883-0490-490d-873e-65b64726755c"},{"id":"ed3001cf-29dc-4be6-9453-46e40a9fb46f","criterion":"voice-cloning-quality","criterion_name":"Voice Cloning Quality","rank_role":"decisive","verdict":"mixed","score":null,"score_total":null,"note":"The dubbed voice was understandable but slightly robotic, so it lacked a natural conversational tone.","artifact_count":2,"evidence_url":"https://aidemos.com/evidence/ed3001cf-29dc-4be6-9453-46e40a9fb46f"},{"id":"c3394629-5f26-4aca-a85b-87003a633f50","criterion":"voice-cloning-quality","criterion_name":"Voice Cloning Quality","rank_role":"decisive","verdict":"struggled","score":null,"score_total":null,"note":"The dubbed voice sounded generic and lacked personality, so the voice cloning was not convincing for a conversational vlog.","artifact_count":2,"evidence_url":"https://aidemos.com/evidence/c3394629-5f26-4aca-a85b-87003a633f50"},{"id":"b83e8e55-8334-4943-89a7-5838c994b96e","criterion":"voice-cloning-quality","criterion_name":"Voice Cloning Quality","rank_role":"decisive","verdict":"struggled","score":null,"score_total":null,"note":"The dubbed voice remains understandable, but it is slightly robotic and lacks a natural tone.","artifact_count":2,"evidence_url":"https://aidemos.com/evidence/b83e8e55-8334-4943-89a7-5838c994b96e"},{"id":"1cc28c29-1c77-459d-a2d3-c73c6224d25f","criterion":"voice-cloning-quality","criterion_name":"Voice Cloning Quality","rank_role":"decisive","verdict":"mixed","score":null,"score_total":null,"note":"The dubbed voice was decent but still sounded less natural than ElevenLabs, with a noticeable AI feel.","artifact_count":2,"evidence_url":"https://aidemos.com/evidence/1cc28c29-1c77-459d-a2d3-c73c6224d25f"}],"appears_in":[{"page_type":"ranking","slug":"ai-video-dubbing-tools","title":"Best AI Tools to Translate Videos with Voice Cloning and Lip Sync","url":"https://aidemos.com/best/ai-video-dubbing-tools","binding":"run"}],"same_scenario":[{"id":"d29db857-29b4-4b28-9e92-85d3759bd67f","tool":"d-id","tool_name":"D-ID","verdict":"failed","score":null,"score_total":null,"note":"Lip sync worked well on the AI avatar, but it did not apply to the original video."},{"id":"208b6f87-9f13-44c4-9f3c-652edc37f2c7","tool":"dubverse","tool_name":"Dubverse","verdict":"mixed","score":null,"score_total":null,"note":"Lip sync is good on slow to medium speech, but fast instruction segments show a slight delay."},{"id":"19111e13-9d4e-4f30-8535-be7a2d3b92c9","tool":"elevenlabs","tool_name":"ElevenLabs","verdict":"failed","score":null,"score_total":null,"note":"No lip-sync feature was provided, so the dubbing could not automatically match the original Hindi mouth movements."},{"id":"9640f541-5757-44ef-b97a-4acbf459fe62","tool":"heygen","tool_name":"Heygen","verdict":"struggled","score":null,"score_total":null,"note":"Lip sync becomes noticeably less accurate and falls out of alignment in some sections."},{"id":"2ca9115f-592f-404b-ba23-8b8340c23781","tool":"rask-ai","tool_name":"Rask AI","verdict":"mixed","score":null,"score_total":null,"note":"Keeps lip sync fairly close on the original speaker, but minor mismatches appear in fast-speech sections."}]}