{"observation":{"id":"5c688257-87af-4ea3-899a-90663fd944e1","tool":"elevenlabs","tool_name":"ElevenLabs","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":"failed","score":null,"score_total":null,"note":"Does not provide built-in lip sync, so the Spanish dub is not visually matched to the speaker’s mouth movements.","evidence_state":"verified","source":"first-party","artifacts":[{"url":"https://d3epheqghktydj.cloudfront.net/elevenlabs-input-2-educational-es-dubbed.mp4","role":"output","alt":"ElevenLabs — Input 2 Educational_es_dubbed.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":"output-only","input":{"state":"not-captured","text":null,"files":[],"modality":"video","stresses":[]},"tool_page_slug":"elevenlabs","tool_url":"https://aidemos.com/tools/elevenlabs","permalink":"https://aidemos.com/evidence/5c688257-87af-4ea3-899a-90663fd944e1","api_url":"https://ai.aidemos.com/v1/observations/5c688257-87af-4ea3-899a-90663fd944e1"},"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":"037db325-ec97-4d49-b00c-d6727c04a9fc","tool":"dubverse","tool_name":"Dubverse","verdict":"worked","score":null,"score_total":null,"note":"Achieves more precise lip sync than the other tested inputs.","artifact_count":2,"thumbnail":"https://d3epheqghktydj.cloudfront.net/dubverse-input-2-educational.mp4","evidence_url":"https://aidemos.com/evidence/037db325-ec97-4d49-b00c-d6727c04a9fc"},{"id":"3f569910-d750-4754-8623-e5774a7e1ddb","tool":"heygen","tool_name":"Heygen","verdict":"mixed","score":null,"score_total":null,"note":"Lip sync is acceptable, but it weakens on longer sentences.","artifact_count":1,"thumbnail":"https://d3epheqghktydj.cloudfront.net/heygen-input-2-educational.mp4","evidence_url":"https://aidemos.com/evidence/3f569910-d750-4754-8623-e5774a7e1ddb"},{"id":"0e34ffc2-0cda-4bf1-b391-b14cf3fc038c","tool":"rask-ai","tool_name":"Rask AI","verdict":"mixed","score":null,"score_total":null,"note":"Performs better on slower, clearer speech, but still shows slight lip-movement delays in some frames.","artifact_count":1,"thumbnail":"https://d3epheqghktydj.cloudfront.net/rask-ai-input-2-educational.mp4","evidence_url":"https://aidemos.com/evidence/0e34ffc2-0cda-4bf1-b391-b14cf3fc038c"},{"id":"99c929a8-85a1-45db-a74c-9b5616555ccd","tool":"sync-labs","tool_name":"Sync Labs","verdict":"mixed","score":null,"score_total":null,"note":"Lip sync worked overall, but it struggled during expressive facial movements and fast speech.","artifact_count":2,"thumbnail":"https://d3epheqghktydj.cloudfront.net/sync-labs-free-copyright-stock-videos-images-and-music-publer-com-online-video-cutter-com.mp4","evidence_url":"https://aidemos.com/evidence/99c929a8-85a1-45db-a74c-9b5616555ccd"}],"other_criteria":[{"id":"19241cf7-6caf-4289-89a4-004445a2503a","criterion":"output-quality-export","criterion_name":"Output Quality & Export","rank_role":"context","verdict":"mixed","score":null,"score_total":null,"note":"Audio export is available but limited, so the result is downloadable yet not positioned as a fully unrestricted production export.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/19241cf7-6caf-4289-89a4-004445a2503a"},{"id":"651871fc-1329-4107-8021-c2508319809f","criterion":"output-quality-export","criterion_name":"Output Quality & Export","rank_role":"context","verdict":"mixed","score":null,"score_total":null,"note":"Audio export was supported, but the free plan imposed limitations, so the output was exportable yet not fully unrestricted or production-ready by itself.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/651871fc-1329-4107-8021-c2508319809f"},{"id":"9fff1c1c-ee8b-4bf1-85e2-80345847c3eb","criterion":"output-quality-export","criterion_name":"Output Quality & Export","rank_role":"context","verdict":"mixed","score":null,"score_total":null,"note":"Audio export was available, but only with limits, so the export path existed without being fully open-ended or production-grade on the free plan.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/9fff1c1c-ee8b-4bf1-85e2-80345847c3eb"},{"id":"3e83cf70-bba6-4c72-b5cd-598f82563082","criterion":"output-quality-export","criterion_name":"Output Quality & Export","rank_role":"context","verdict":"mixed","score":null,"score_total":null,"note":"Supports audio export in the free plan, but with limits; higher quality and longer usage require paid access.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/3e83cf70-bba6-4c72-b5cd-598f82563082"},{"id":"52295852-5bc7-4589-acd2-e6e1654cf14c","criterion":"output-quality-export","criterion_name":"Output Quality & Export","rank_role":"context","verdict":"failed","score":null,"score_total":null,"note":"The exported dub is not fully production-ready because the last part of the audio is missing.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/52295852-5bc7-4589-acd2-e6e1654cf14c"},{"id":"f8dc7c1a-4373-4541-a29a-bb4a853895db","criterion":"translation-accuracy","criterion_name":"Translation Accuracy","rank_role":"decisive","verdict":"worked","score":null,"score_total":null,"note":"Produces an accurate Hindi translation of the English fitness narration, preserving the intended meaning well enough for instructions.","artifact_count":2,"evidence_url":"https://aidemos.com/evidence/f8dc7c1a-4373-4541-a29a-bb4a853895db"},{"id":"130f872b-fe40-4848-bbb8-0068509c4f5d","criterion":"voice-cloning-quality","criterion_name":"Voice Cloning Quality","rank_role":"decisive","verdict":"worked","score":null,"score_total":null,"note":"The Spanish dubbed voice was reported as excellent, clear, professional, and highly natural sounding, which fit the educational tone well.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/130f872b-fe40-4848-bbb8-0068509c4f5d"},{"id":"24b506a1-22d9-4fa2-9260-63f4776dc5ea","criterion":"voice-cloning-quality","criterion_name":"Voice Cloning Quality","rank_role":"decisive","verdict":"mixed","score":null,"score_total":null,"note":"Generates a very natural and expressive English voice, but it sounds more polished and formal than the original casual vlog style, so the speaker’s personality is not fully preserved.","artifact_count":2,"evidence_url":"https://aidemos.com/evidence/24b506a1-22d9-4fa2-9260-63f4776dc5ea"},{"id":"ed554b4b-daf1-40eb-87de-acd4682ef325","criterion":"voice-cloning-quality","criterion_name":"Voice Cloning Quality","rank_role":"decisive","verdict":"worked","score":null,"score_total":null,"note":"The dubbed voice was reported as very high quality: natural, human-like, expressive, and especially strong for energetic fitness instruction delivery.","artifact_count":2,"evidence_url":"https://aidemos.com/evidence/ed554b4b-daf1-40eb-87de-acd4682ef325"}],"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":"037db325-ec97-4d49-b00c-d6727c04a9fc","tool":"dubverse","tool_name":"Dubverse","verdict":"worked","score":null,"score_total":null,"note":"Achieves more precise lip sync than the other tested inputs."},{"id":"3f569910-d750-4754-8623-e5774a7e1ddb","tool":"heygen","tool_name":"Heygen","verdict":"mixed","score":null,"score_total":null,"note":"Lip sync is acceptable, but it weakens on longer sentences."},{"id":"0e34ffc2-0cda-4bf1-b391-b14cf3fc038c","tool":"rask-ai","tool_name":"Rask AI","verdict":"mixed","score":null,"score_total":null,"note":"Performs better on slower, clearer speech, but still shows slight lip-movement delays in some frames."},{"id":"99c929a8-85a1-45db-a74c-9b5616555ccd","tool":"sync-labs","tool_name":"Sync Labs","verdict":"mixed","score":null,"score_total":null,"note":"Lip sync worked overall, but it struggled during expressive facial movements and fast speech."}]}