Lip sync worked on the original face, but slight delay and visible mismatch appeared during fast movements.
What was measured
Lip Sync Accuracy
Does the dubbed audio visually match lip movements in the original video?
decisive for this rankingtransformation
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)
What was given, what came back
Test input: Hindi vlog-style talking head (Hindi → English) · video · group: video-translation-voice-clone-lip-sync
Input — what we sent
Sync Labs — Input 1 Fitness Video (online-video-cutter.com).mp4
Input not captured
This run recorded no prompt or input file for the test, so we cannot show you what produced the result below. Capture gaps are tracked, not hidden.
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.
Output — unretouched
Sync Labs — sync-video (2).mp4
Also checked on this input — same tool, 13 other criteria
Automation Level✓ WorkedThe workflow was medium to high automation: after upload, the translation and dubbing pipeline ran automatically.Automation Level✓ WorkedAutomation was high after upload, with the rest of the dubbing pipeline handled by the tool.Automation Level◐ MixedAfter 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.Input Handling✓ WorkedThe Hindi video processed after manual upload, and the report says the tool supports multilingual input including Hindi.Translation Accuracy◐ MixedEnglish translation is mostly correct, but the casual vlog tone is not preserved and the result feels slightly stiff.Translation Accuracy✓ WorkedThe Spanish translation was accurate and clear, especially for structured educational speech.Translation Accuracy◐ MixedEnglish→Hindi translation is moderately accurate on fast, energetic speech, so the meaning is mostly preserved but not fully robust.Translation Accuracy✓ WorkedEnglish→Spanish translation is accurate and clear on structured educational narration.Voice Cloning Quality◐ MixedThe dubbed voice is decent but still sounds AI-like and less natural than ElevenLabs, so the speaker match is only moderate.Voice Cloning Quality◐ MixedThe dubbed voice was understandable but slightly robotic, so it lacked a natural conversational tone.Voice Cloning Quality⚠ StruggledThe dubbed voice sounded generic and lacked personality, so the voice cloning was not convincing for a conversational vlog.Voice Cloning Quality⚠ StruggledThe dubbed voice remains understandable, but it is slightly robotic and lacks a natural tone.Voice Cloning Quality◐ MixedThe dubbed voice was decent but still sounded less natural than ElevenLabs, with a noticeable AI feel.
Provenance
- Observation
- a1fc94f4-552b-4e54-984c-4e12507cd98b
- Evidence run
- 9feca581-b454-4bda-a610-a646cd0092f0
- Study
- Translate Videos with Voice Cloning and Lip Sync Using AI
- Research task
- 86b96dfpf
- Tested at
- Jun 24, 2026
- Source
- first-party
- Evidence state
- verified
- Proof shown
- input + output shown
- Cost / latency
- not captured
- Repeat run
- not captured
- Tester
- not captured
The last three rows are honest blanks, not placeholders — our capture has no field for them yet.
Query this
get_evidence({
tool: "sync-labs",
scenario: "video-translation-voice-clone-lip-sync"
})MCP · mcp.aidemos.com/api/mcp
Free with attribution.
Same input, same check — 5 other tools
measured on Lip Sync Accuracy
D-ID✗ FailedLip sync worked well on the AI avatar, but it did not apply to the original video.Dubverse◐ MixedLip sync is good on slow to medium speech, but fast instruction segments show a slight delay.ElevenLabs✗ FailedNo lip-sync feature was provided, so the dubbing could not automatically match the original Hindi mouth movements.Heygen⚠ StruggledLip sync becomes noticeably less accurate and falls out of alignment in some sections.Rask AI◐ MixedKeeps lip sync fairly close on the original speaker, but minor mismatches appear in fast-speech sections.
This evidence is published in
Real inputs and real outputs, no retouching · every cell queryable via API & MCP · aidemos.com