Magic Hour lip sync: workflow, pricing & troubleshooting

Runbo Li
Runbo Li
·
· 3 min read
MH lip sync

Quick answer

Magic Hour Lip Sync matches a visible face in an existing video to a supplied audio track. Use it to replace a line or create a dubbed version without recording the picture again. Start with a short sample, approve the speech and facial movement, then generate the full version. For a still portrait, use Talking Photo instead.

Try lip sync on a short clip

Upload a short permitted video and approved audio, then review timing, identity, edges, and the complete result.

Try Lip Sync

Magic Hour publishes this guide about its own Lip Sync product. Treat it as product documentation rather than an independent review; verify the current workflow, limits, pricing, and output on a short permitted sample before committing a full project.

When Magic Hour Lip Sync fits the job

Your task

Starting workflow

Replace narration spoken by an on-screen person

Lip Sync: video plus the approved new audio

Make a portrait deliver a short message

Talking Photo: image plus audio

Create speech from a written script

Voice Generator, then review the audio before syncing

Create a scene without source footage

Generate the picture first; lip sync alone does not create an entire scene

Translate an existing video

Approve the translation and voice before synchronizing the lips

A practical dialogue-replacement workflow

Imagine an onboarding video says “Click the green button,” but the interface now uses a blue button. Replace the spoken instruction with “Click the blue button” and supply the new audio to Lip Sync. Review the screen recording too: synchronized speech will not update the button shown in the picture.

  1. Trim a continuous shot containing the visible speaker and the line to replace.
  2. Record or generate the new line at a pace that fits the scene.
  3. Listen to the audio by itself and approve every word.
  4. Upload the video and audio to Magic Hour Lip Sync.
  5. Watch the generated result through the start, pause, and end of the sentence.
  6. Put the approved clip back into the edit and update any captions or on-screen instructions.

For upload screenshots, follow how to lip sync a video.

What is free, and when do you need a paid plan?

The current Lip Sync product page offers three guest generations per day without signup, with a ten-second maximum. Free video results may include a watermark. Account credits, saved projects, rewards, higher limits, watermark-free output and commercial-use eligibility depend on the current account and plan.

Paid plans currently add credits, higher export limits, API access, commercial use and watermark-free exports under the applicable terms. Prices are localized and can change, so use the current pricing page for the visitor's region and billing period instead of relying on a copied dollar amount.

Try the sample before choosing a plan. Pay for the duration, mode, and export your project needs after the result meets your requirements.

What to fix when the result looks wrong

Symptom

First thing to check

Audio is consistently early or late

Input start times and the selected segment; correct a simple timing offset in the edit

Mouth is unclear or distorted

Face angle, blur, lighting, and objects covering the mouth

Lip movement continues through pauses

Silence and background sound in the supplied audio; compare a cleaner recording

The wrong person appears to speak

Multiple visible faces or overlapping speakers; test a single-speaker shot

The line sounds rushed or ends abruptly

Audio length against the available scene; rewrite or record a shorter line

The face changes during a turn

A different source angle or a less obstructed shot

Do not keep regenerating the same unsuitable inputs indefinitely. A reshoot or conventional edit may be the better way to finish a difficult scene.

Using Lip Sync through the API

The current Lip Sync API tool guide documents per-rendered-frame charging: Lite and Standard use one credit per rendered frame and Pro uses two. A ten-second clip capped at 30 FPS is about 300 credits at the one-credit rate. The completed job's credits_charged field is the exact cost; the initial value can be an estimate based on the eventual rendered FPS.

Use the API reference for upload fields, segment selection, and frame-rate settings. Keep API billing calculations separate from the free guest website offer.

Before publishing a dubbed or edited video

Check the message, face, audio, captions, and any visible demonstration together. For localization, have a fluent speaker review the translation. Make sure your use of the person's likeness, voice, and footage is authorized; a paid plan does not supply those permissions for someone else's media.

If you are still choosing a platform, use the lip sync comparison. If your next step is simply trying a recording, open Lip Sync with one short clip and its approved audio.

Product, plan and API facts were rechecked against the Lip Sync product page, pricing page, tool guide and API reference on September 13, 2026.

Runbo Li
Runbo Li
CEO of Magic Hour
Runbo Li is the Co-founder and CEO of Magic Hour, where he builds AI video and image tools for content creation. He is a Y Combinator W24 founder and former Data Scientist at Meta, where he worked on 0-1 consumer social products in New Product Experimentation. He writes about AI video generation, AI image creation, creative workflows, and creator tools.
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Magic Hour editorial collage comparing AI lip sync with phoneme drawings and a speech waveform
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