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Mephify

No sign-up. No install.

AI video prompt

Give the length and what happens. The cut count follows the length instead of being fixed first, and the subject holds.

This is what comes out

The request, one line
Make a prompt for a 15-second wireless-earbud unboxing reel
The instruction Mephify wrote · one passage of 731 words
**Content for the generation field** Wireless-earbud package, [FILL IN: exact product and packaging description], hands open the package in a clear physical sequence, lid lifts, inner tray reveals the charging case, case opens, earbuds become visible, compact tabletop product composition, close-up framing for packaging details, controlled hand movement, stable object placement, soft directional light landing on the box and case surfaces, visible paper and plastic textures, restrained neutral background, shallow but readable depth of field, clean product-video styling, tactile unboxing rhythm, no unsupported branding or product claims. Use the user's exact product facts wherever supplied. Do not add a colour, logo, material, feature, action, person, setting, or sound that the input does not establish. If the user has not supplied a visual fact, keep it as `[FILL IN: item]` rather than inventing it. Use structured tables and noun-phrase blocks for production values. Use short narrative sentences only for the change rationale and handoff explanation. The decisive passage is the reveal: give it the longest uninterrupted beat so the product can be read clearly.
Full instruction
What the engine would settle
Not a render. The instruction went to a stand-in playing that engine, to see what it settles and what it leaves to the engine. If you run it, post what came out.
What the engine reads it as3 scenes
Left for the engine to decide9 things — put them in the request and they go away
Set by the instruction4/4
Lines you can dropNone
Same subject on a second runNo
Run log

The instruction went in as-is; this is what came back, unedited.

One run. Paste it again and the wording will differ.

This is what Mephify is programmed to produce, so it is AI-authored output, published exactly as it came out.

How we make it and how we check

Make yours

Other media documents: AI image promptAI music prompt

Paste it into whichever generator you use. No tool names are baked in.

1. Type

The fields below change with the type you pick — each type needs different material.

2. What happens

We use only the facts you provide — nothing invented, and your text is never stored.

Ultimate prompt

We turn the choices above into an instruction you can paste into your AI.

The same instruction gives different wording on Gemini. Compare on the example page.

Common questions

Can I use it without an account?
All you need is the product and the length. Fill the fields and press the button; there is nowhere on this site to create an account.
Where do I paste what comes out?
Not using one particular tool? That is fine. Any video generator that takes a text prompt receives it, and no tool name is written into the prompt. Each cut is labelled, so you can paste them one at a time where your service works that way.
Does what I type stay anywhere?
The text is not kept. What remains is a count, such as how many characters you typed; the privacy policy has the details.
Do the cuts fit the length?
Fifteen seconds in six cuts? That is what the prompt avoids: the cut count follows the length instead of being fixed first. In the unboxing run above, one stand-in split 15 seconds into four scenes and another into three, and each scene carried its own duration. Fix the count in the request when you need an exact number. Read more
What about aspect ratio and resolution?
State both in the request. The unboxing prompt left them open, so one stand-in defaulted two of its four parameters while the other took all four from the prompt. Write 9:16 and the resolution you want, and the engine stops choosing.
What if the recipe or the product is missing?
Then the engine invents what to show. The recipe run gave nothing but fried rice, and the two stand-ins guessed 29 and 34 things: the ingredients and amounts, the pan, the counter, even the direction of the light. Give the ingredient list or the product description and the scene contents stop being invented.

More ai video prompt examples

From the operator's verification log

What to watch for

Unlike the Korean edition, this one leaves aspect ratio and resolution to the engine — state 9:16 and the resolution in the request. Runway's two 'contradictions' are the slot-versus-render tension every media instruction has (fill the slot, or keep it as a slot) rather than real conflicts. The product still has to be described; otherwise you get someone else's earbuds.

Where not to use it

A stand-in check, not a rendered video. Scene counts (4 versus 3) show the instruction leaves cutting to the engine — fix the count in the request if you need it.

Read the full log