Evidence · first-party tested/Best AI Tools for Video Translation with Voice Cloning and Lip Sync

On the Hindi vlog clip, a full Hindi sentence ('JARURAT PADTI HAI') and another word ('AAP') remained untranslated, showing the tool can leave source-language on-screen text unchanged in the English output.

✗ Failed🧾 artifact-verifiedinput + output shownTest date not recordedCamb AI →

What was measured

Translation Accuracy

Is the translated output semantically correct, and does it preserve technical terms, tone, and meaning?

decisive for this rankingtransformation

If the translation changes meaning, tone, or technical terms, the tool fails the core job of translating the video. (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

A casual Hindi talking-head/vlog-style video used to test English dubbing on informal speech, Hinglish-like phrasing, speaker personality preservation, and lip sync under natural creator-style delivery.

Why this input is hard

· Informal Hindi speech transcription
· Hindi-to-English translation of casual phrasing
· Voice cloning for conversational creator tone
· Handling of slang/Hinglish-style content
· Lip-sync stability during expressive speech

Output — unretouched

Also checked on this input — same tool, 1 other criterion

Lip Sync Accuracy✗ FailedOn the Hindi→English vlog clip, the output again left mouths unchanged, with only ~1.7-2.7/255 pixel difference across the 10-second clip and frame-identical mouths at t=0.0s.

Provenance

Observation: 287cebc8-e1c6-43f1-9b91-082aa994d864
Evidence run: ec1dd100-6af8-4f49-8f19-b78492702b14
Study: Translate Videos with Voice Cloning and Lip Sync Using AI
Research task: 86b96dfpf
Tested at: not recorded
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: "camb-ai",
  scenario: "video-translation-voice-clone-lip-sync"
})

MCP · mcp.aidemos.com/api/mcp

JSON · ai.aidemos.com/v1/observations/287cebc8-e1c6-43f1-9b91-082aa994d864

Free with attribution.

Same input, same check — 8 other tools

measured on Translation Accuracy

Akool✗ Failed"JARURAT PADTI HAI" and the later word "BATAANE" remained untranslated in the English dub.D-ID◐ MixedThe English translation is understandable, but it sounds slightly formal and less natural for casual vlog speech.Dubverse◐ MixedThe Hindi-to-English translation remains understandable and retains the overall meaning, but it degrades on slang, informal tone, and mixed-language phrasing.HeyGen✗ FailedThe tool failed to translate the word-emphasis captions in the vlog clip; "AAP" and "MAIN" stayed untranslated in the output.Rask AI✗ FailedThe Hindi→English talking-head export renders the word-emphasis captions as Roman-script Hindi ('JARURAT PADTI HAI', 'HAR', 'BHII') instead of English, while pre-existing English branding is left untouched.Sync Labs◐ MixedThe English translation is mostly correct, but it does not preserve the casual vlog tone.Synthesia◐ MixedTranslation is partial in the vlog run: pre-existing English branding text is preserved correctly, but word-emphasis captions like "HAK" and "MAIN" remain untranslated in Roman script.VEED⚠ StruggledThe English dub is polluted by untranslated Romanized-Hindi caption text; 'KAR RAHE HAIN' and 'MAIN' appear in the output, and 'MAIN' is described as a fabricated caption that was not present in the source frame.

This evidence is published in

Best AI Tools for Video Translation with Voice Cloning and Lip Sync →

From the same study (page rebuilt from a later run)

Best AI Tools to Translate Videos with Voice Cloning and Lip Sync →

Real inputs and real outputs, no retouching · every cell queryable via API & MCP · aidemos.com