iFlytek Yizhi: video subtitles and multilingual dubbing in hours, not weeks

iFlytek Yizhi is an AI audio and video localization platform built by iFlytek. It compresses what used to be a week-long outsourced localization cycle into hours. You upload a clip, the platform handles speech transcription, timeline segmentation, and multilingual translation automatically, layers AI dubbing and lip sync on top when needed, and exports subtitle files that drop straight into editing software.

The foundation is iFlytek's accumulated work in speech recognition, machine translation, and speech synthesis. Transcription accuracy is quoted at 97.5%, and one hour of audio or video can produce subtitles in as little as five to ten minutes. That speed is what makes it practical for batch content and material with a tight deadline.

On the language side it translates between Chinese and English, Japanese, Korean, German, French, Spanish, Russian, Italian, Arabic, and others, 17 languages in total. Exports cover SRT, ASS, XML, and TXT, and connect directly to editing suites such as Premiere and Final Cut Pro without a conversion step.

The platform runs two paths. For speed there is machine subtitling, where the AI produces the draft end to end. For accuracy there is human subtitling, where a professional localization team proofreads and delivers one hour of audio in as little as 24 hours, with data confidentiality commitments.

What iFlytek Yizhi does

AI subtitle generation

Transcription accuracy of 97.5%, with one hour of material producing a draft in five to ten minutes. The system segments the timeline and generates timecodes automatically, handing the most labour-intensive alignment work to the machine.

Multilingual translation

Bidirectional translation between Chinese and 17 languages including English, Japanese, Korean, German, French, Spanish, Russian, Italian, and Arabic, so one asset can be distributed across several language markets.

AI dubbing

Multiple emotions and multiple voice timbres, with voiceprint cloning from a single sentence. The result reads the translation in the original speaker's tone, which sits much closer to the source footage than a generic synthetic voice.

Lip sync

Intelligent matching of dubbed audio to on-screen mouth movement, so localized video still holds up in close-ups and tight framing.

Timecode matching for existing scripts

If you already have a translation, import the subtitle text together with the video and match timecodes in one click. The system also diagnoses whether the timing is accurate, which suits replacing old subtitles or reusing an existing translation.

Multi-format export

SRT, ASS, XML, TXT and more, connecting directly to Premiere, Final Cut Pro, and similar editors, which removes the manual format conversion and re-alignment work.

Speaker separation

Automatic detection and separation of different speakers in a video, which makes post-production on interviews, panels, and meeting footage far easier.

Background music separation

Intelligent separation of voice and background music that preserves the original sound, so translation or dubbing does not damage the score.

Human proofreading service

A professional localization team reviews the output, with one hour of audio delivered in as little as 24 hours under data confidentiality commitments, which suits commercial projects with accuracy and compliance requirements.

How to use iFlytek Yizhi

1. Open the iFlytek Yizhi website (yizhi.iflyrec.com), register an account, and sign in.
2. Click the workspace entry in the navigation bar to reach the operating interface.
3. Upload the video or audio file you need to process.
4. Choose the service type: machine subtitles for automatic AI processing, or human subtitles for the professional team.
5. Set the source language and the target translation language.
6. Wait while the system performs transcription, translation, and timeline segmentation.
7. Review the generated subtitles in the online editor, revise wording, and adjust timing.
8. If dubbing is needed, open the AI dubbing feature and pick a voice style or clone a specific voiceprint.
9. Export the subtitle file, or burn subtitles directly into the video.
10. Download the finished video or subtitle file locally and import it into your editing software for further work.

Where iFlytek Yizhi fits

• Creators going international: short video producers add multilingual subtitles quickly and distribute content across language markets, lowering the cost of reaching audiences abroad.
• Online education: course videos localized into multiple languages to serve overseas learners, helping institutions open international markets.
• Film and variety post-production: professional subtitle creation with timeline matching that connects directly to editing software and shortens the post-production cycle.
• Corporate videos: multilingual dubbing and subtitle localization for product ads and brand films, supporting cross-border e-commerce and overseas marketing.
• Meeting transcription: recordings transcribed into text and turned into minutes, with support for highlighting and searching key points.
• Vlogs and documentaries: bilingual subtitles for travel and lifestyle content, raising the professional polish and reach of the finished piece.

Limitations to know first

• The 97.5% accuracy figure is a quoted metric. Real performance depends on accent, dialect, background noise, and technical terminology, so important content still deserves a human review pass.
• Machine subtitles suit speed-critical work. Projects with brand wording, legal clauses, or strict subtitle standards should use the human proofreading path.
• AI dubbing and voiceprint cloning involve permission to use another person's voice. Confirm the rights to your material and the platform terms before commercial use; cloning is not something to assume is allowed.
• Public material does not state pricing, free quotas, or delivery-time differences per language, so check the current plans on the official site before committing.
• Automatic timeline segmentation may still need manual correction where speakers overlap, speech rate changes abruptly, or long musical passages appear.

Frequently asked questions

How long a clip can iFlytek Yizhi handle?

Public material uses one hour of audio or video as its example: machine subtitles in five to ten minutes, human proofreading of one hour of audio delivered in as little as 24 hours. Check the official site for handling and turnaround on longer material.

Which languages are supported?

Translation runs between Chinese and 17 languages including English, Japanese, Korean, German, French, Spanish, Russian, Italian, and Arabic. Source and target languages are selected after upload.

Can the generated subtitles go straight into editing software?

Yes. Exports include SRT, ASS, XML, and TXT, which connect directly to Premiere, Final Cut Pro, and similar editors without format conversion.

What if I already have a translation and only need timing?

Import the subtitle text together with the video and match timecodes in one click. The system also diagnoses whether the timing is accurate, which suits replacing old subtitles or reusing an existing translation.

How do I choose between machine and human subtitles?

Choose machine subtitles when speed matters and the content is mostly spoken word. Choose human subtitles for brand launches, legal or compliance wording, and terminology-heavy projects, where the team proofs before delivery.