A convincing conversation needs more than moving mouths. The right character must say the right line, while expressions, gestures, and timing support the performance.
This guide explains how to write MiniMax H3 dialogue prompts for single speakers, two-person conversations, and voiceover scenes. Start with the short examples below, then adjust one element at a time. These are suggested prompts to test, not guaranteed results.
TL;DR: MiniMax H3 Dialogue Workflow
Assign every line to a recognizable speaker. Keep names and identifying details consistent throughout the prompt.
Give dialogue room to breathe. Short lines leave more time for expressions, pauses, and reactions.
In conversations, describe the listener as well as the speaker. Listening should be an explicit part of the scene.
Separate voiceover from on-screen speech. A narrator can speak while the visible character performs a silent action.
Check speaker assignment, spoken words, and mouth movement separately. Clearer prompts can improve control, but they do not guarantee perfect lip sync.
Build a Clear MiniMax H3 Dialogue Prompt
Give every line a speaker and a purpose.
A useful MiniMax H3 dialogue prompt template follows this order:
Scene → Speaker → Exact line → Delivery → Visible action → Listener reaction
Establish who is present before introducing speech. Use a stable name or a clear identifier, such as “Maya in the green jacket.” Put the actual dialogue in quotation marks, with voice direction and movement outside the quoted words.
For example, "she sounds nervous" leaves much of the performance undefined. "She speaks quietly, pauses briefly, and glances toward the door" gives the scene observable behavior.
In [setting], [named character] says, “[exact line],” in a [voice quality] voice at a [pace] pace. While speaking, [one simple action]. [Other character] listens silently and [brief reaction]. The camera [one clear direction].
💡 This is a practical natural-language starting point. Follow the format accepted by your particular workflow rather than treating every tag as a required website field.
For broader guidance on images and references, see the MiniMax H3 Prompt Guide.
Create Natural Single-Speaker Videos
Make the delivery feel like a performance.
For a MiniMax H3 talking character, begin with one short line and one purposeful gesture. A small smile, a glance, or a restrained hand movement gives the character something to do without crowding the speech.
Example: A Friendly Introduction
A medium close-up shows Maya in a green jacket beside a café window. She looks toward the camera and says, “Hi, I'm Maya. Let me show you my favorite spot,” in a warm, relaxed voice. She makes one small gesture toward the window, then smiles after finishing. The camera remains still. Quiet café ambience, no background music.
💡 Use tip: Choose a specific delivery, such as calm and conversational, instead of stacking conflicting instructions like excited, whispered, dramatic, and fast.
Leave a brief moment after the sentence for the expression to settle. Before adding camera movement, check whether the line sounds complete and the face remains natural while speaking.
Direct Two Speakers Without Mixing Up Their Lines
One person speaks; the other has something to do.
MiniMax H3 multiple-speaker prompts need a clear sequence. Begin with a short exchange before attempting interruptions, shared lines, or several changes of speaker.
Assign Each Line to a Recognizable Speaker
Give each character a stable identifier and reuse it with each line. Names plus a visible feature are easier to follow than a paragraph filled with “he,” “she,” and “the other person.”
Keep voice descriptions distinct but simple. A soft delivery and a lower, measured delivery can establish contrast without asking for exaggerated accents or constant changes in emotion.
Describe Listening as Clearly as Speaking
The listener can watch, nod, or react silently. Explicitly describe that behavior so both people are not assigned speech at the same moment.
Example: A Café Conversation
A steady medium two-shot shows Maya in a green jacket and Leo in a navy sweater at a café table. Maya asks in a light, curious voice, “Did you find the place?” Leo listens with his mouth closed. After Maya finishes, Leo replies in a lower, relaxed voice, “Yes. It's just around the corner.” Maya listens silently, then smiles. Soft café ambience, no music.
💡 Use tip: Test this exchange with a fixed camera first. Add a reaction shot only after the speaking order works.
If repeated attempts still mix the lines, try separate shots for each speaker and assemble them in an editor. This reduces the number of simultaneous instructions, though continuity still needs checking.
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Add Voiceover Without Making Characters Speak
Let the narrator speak while the scene keeps moving.
A MiniMax H3 voiceover prompt should make the sound source explicit. Describe an off-screen narrator separately from the person or object shown in the scene.
Example: A Product Demonstration
A woman silently places a ceramic travel mug on a desk and turns it so the handle faces the camera. An off-screen narrator says, “A little comfort for your everyday routine,” in a calm, clear voice. The woman's lips remain closed throughout. The camera slowly moves closer to the mug. A soft ceramic tap and quiet room ambience, no music.
💡 Use tip: Avoid describing the visible character as “explaining” or “introducing” the product when the narration should remain off-screen. Give that character a specific silent action instead.
If unwanted mouth movement persists, another option is to generate a silent visual and add narration during editing.
This suits voiceover scenes; adding an audio track afterward does not automatically synchronize a speaking face.
Add background music after the narration works. You can use MiniMax Music to create a separate background track, then combine it with the footage and narration in an editor. Consider instrumental music for dialogue-heavy scenes and keep it quieter than the speech. For a song-led project, explore the MiniMax H3 Music Video Guide.
Troubleshoot Dialogue and Lip-Sync Problems
Match the adjustment to the visible or audible problem.
When reviewing MiniMax H3 lip sync, check three things separately:
who speaks
whether the words are correct
whether mouth movement follows the speech
Fix the clearest failure before adding more detail.
Why Does the Wrong Character Say the Line?
Replace ambiguous pronouns with the same character name and identifying detail beside each line. Reduce the exchange to one line per person before adding more turns.
Why Do Both Characters Move Their Mouths?
Specify the listener's silent reaction and closed mouth during the other person's line. If this remains unstable, test individual speaker shots rather than repeatedly expanding the same prompt.
Why Is the Dialogue Cut Off?
Read the line aloud at the intended pace. If it leaves little time for pauses or reactions, shorten the wording or choose a longer available duration. Avoid fitting a long sentence into a clip by demanding rushed speech.
What If the Mouth Movement Does Not Match the Voice?
Test a shorter line with a clearly visible face, a steady camera, and fewer gestures. Compare the mouth movement with the audible speech before restoring more complex performance. These adjustments simplify the test; they are not a guaranteed lip-sync repair.
Why Does the Voice Change Between Shots?
Reuse the same character identity and concise voice description. Check clips together, since differences may be less obvious when heard separately. Matching descriptions alone do not guarantee identical voices across independent generations.
Start Your Dialogue Video with MiniMax H3
Better MiniMax H3 dialogue videos begin with a manageable performance.
Test one speaker and one short line, then add a listener, a reply, or a voiceover scene.
Keep the changes that improve the result and simplify anything that competes with the dialogue.
MiniMax H3 Dialogue FAQs
Is MiniMax H3 limited to two speakers?
The prompt guide does not specify a two-speaker limit or a maximum speaker count. You can try larger conversations, but accurate turn-taking, distinct voices, and lip sync need testing. Start with a short exchange and add speakers gradually, or split a group conversation into separate shots.
Should the Prompt Be in English if the Dialogue Is in Another Language?
Keep the spoken line in the language you want the audience to hear and name that language explicitly. The surrounding scene directions can remain in English. Test a short line first to check pronunciation and delivery.
Can I Keep the Same Voice Across Separate Clips?
Consistent character and voice descriptions provide a useful starting point, but each generation needs review. If an identical narrator is essential, using a continuous narration track during editing can provide more predictable continuity.
Should I Generate Subtitles Inside the Video?
For exact wording, timing, and easy revisions, adding subtitles afterward is a practical choice. Review the generated speech before captioning so the text matches what viewers actually hear.
Can I Use These Prompts with Animated Characters?
The same structure can guide animated dialogue: identify the character, assign the line, describe delivery, and specify a reaction. Keep the facial design and animation style consistent, then inspect whether the mouth shapes communicate the speech clearly.