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Prompt or still. Short clip with sound. Repeat.

Fast H3: 5–15s clips from a prompt or still

Put a sentence in the box, or drop the first frame of the shot. Fast H3 returns a 5–15 second clip with the soundtrack already mixed — then you tweak a word and go again.

Start frame
End frame
Duration (seconds)5s
5s10s15s
Number of outputs

Production preview

Result
  • Fast H3
  • text to video
  • image to video
  • 480P
  • 768P
  • synced audio

What Fast H3 hands you

Fast H3 reads a line of text or one opening still and returns a 5–15 second clip with picture and sound in the same file.

Work at 480P while you hunt for the take, then switch to 768P for the version you keep.

August 2026 scores from Design Arena and Artificial Analysis put this build first for overall quality, prompt understanding, and aesthetics, including the top slot on Design Arena's image-to-video board. Text-to-video is enough on its own; add a last frame only when you need to pin the landing.

Showcase

Made with Fast H3 — prompts included

Six finished clips. Steal the prompt shape, swap the subject, run your own take on the homepage generator.

A kitten, a butterfly, afternoon light

Ask for a white kitten after a butterfly in a sunny garden, plus a tracking camera and leaf-filtered light. Fast H3 fills in the rest of the shot.

Try this garden shot
Text to video result: a white kitten chasing a butterfly across a sunlit garden

A monk, drones, a ruined terrace

Spell out the first four seconds: a warrior-monk on a cliffside monastery, survey drones overhead. Fast H3 follows the beat sheet instead of inventing a different cut.

Try a timed prompt
Video still: a warrior-monk crossing a ruined monastery with drones overhead

A still that speaks the line

Upload a portrait as the start frame and write the line you want heard. Fast H3 moves the face and records the voice in one pass.

Speak from a still
Image to video result: a portrait speaking with synced dialogue

A SCORE counter and a San Francisco run

Ask for 16-bit endless-runner footage: jump, duck, a HUD, chiptune. Fast H3 keeps the sprite, the scrolling city, and the soundtrack together.

Try the runner
Pixel art video still: a San Francisco endless runner in 16-bit gameplay

A frog, pancakes, prints in the clay

Call for stop-motion: a round frog in a scarf, a tiny kitchen, stepped 12fps, clay squeaks. Fast H3 holds the cadence and the sound together.

Try the clay frog
Stop-motion still: a claymation frog with pancakes in a tiny kitchen

Wings you can hear

Ask for a slow close-up of a hummingbird at a red trumpet flower, pollen in the air. Fast H3 keeps the blur of the wings and the hum in the same file.

Try the close-up
Slow-motion still: a hummingbird hovering at a red trumpet flower
Controls

Fast H3 controls: length, frame, and sound

  • Pick 5, 10, or 15 seconds

    Length is a whole number of seconds. Five is the Fast H3 starting point; stretch it only when the beat needs more room.

  • Wide, square, or vertical

    Text-to-video offers 21:9, 16:9, 4:3, 1:1, 3:4, and 9:16. Image-to-video copies the shape of the still you upload.

  • Draft at 480P, finish at 768P

    768P is 1344×768 at 24 FPS. Burn cheaper 480P takes until the framing is right, then re-run that prompt on Fast H3 at 768P.

  • Sound arrives with the picture

    Dialogue, room tone, and effects render in the same pass. Spoken lines are listed as stable in 11 languages.

  • Open on a still, land on another

    The start frame is required for Fast H3 image-to-video. Add an end frame only when you need the last pose locked.

  • Words on screen that still read

    Ask for a sign, a label, or an end-card and check the 768P take — the letters are meant to hold.

Workflow

How to make a video with Fast H3

  1. 1

    Write the shot, or drop a still

    A single sentence is enough for Fast H3. For image-to-video, upload the opening frame and, if you need it, the closing one.

  2. 2

    Choose seconds, resolution, and ratio

    Set 5 to 15 seconds, 480P or 768P, and a frame from 21:9 to 9:16. You pay per second of finished output.

  3. 3

    Watch it, then change one word

    Fast H3 returns picture and sound together. Keep the take, or edit the prompt and generate again.

Deadline work

Fast H3 jobs that finish before the meeting

When the brief lands at nine and the review is at ten, this is what a 5–15 second clip with sound gets used for.

  • Storyboard artists: twelve rough takes before lunch

    Run the whole board through Fast H3 at 480P for 35 credits a shot, pick the frames that work, and hand the director something moving instead of stills.

  • Performance marketers: A/B hooks at 480P, winner at 768P

    Cut six 5-second openers, put them in front of the audience, then spend 75 credits on the one that actually held attention.

  • Founders: a launch clip for the announcement post

    One sentence about the product, one 9:16 or 16:9 frame, and Fast H3 hands back a clip with sound before the tweet is drafted.

  • Editors: b-roll to plug the gap in a cut

    Describe the missing establishing shot, match the aspect ratio of the timeline, and Fast H3 drops a take straight into the edit.

  • Sellers: pack shot to product clip

    Upload the product photo as the start frame; Fast H3 adds the turn, the light, and the room sound for a listing or a story ad.

  • Course creators: a spoken intro from one portrait

    A headshot plus the opening line becomes a 5–15 second talking intro for the lesson page, dialogue already synced.

Pricing

Fast H3 pricing by the second

You pay for finished output only: 7 credits a second at 480P, 15 at 768P. Plans start at $19.90 for 1,500 credits a month.

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FAQ

Before your first Fast H3 take

Next take

Write the shot. Fast H3 runs it.

Hunt at 480P. Keep the 768P. Both files already have sound.