Mischief 1 Vertical Video: How to Make 9:16 Clips from 16:9 Output

Mischief 1 does not render vertical video. Every clip comes out 16:9 landscape, at 480p (832×480) or 720p (1280×720), 3 or 5 seconds long at 16 fps, with no audio (fal API schema). You can still post it to a 9:16 feed such as Reels, Shorts or TikTok. There are two ways to do it after the render: crop a narrow vertical slice out of the clip, or place the whole widescreen clip inside a vertical frame. This page shows the pixel math for each, how to plan the first frame so a crop works, and two tested ffmpeg commands. If the result has to be native vertical, a different model is the better tool.

New to the tool? The basic walkthrough is the image-to-video guide, and the form itself is the generator.

Three ways to get a vertical clip

How many pixels survive

A 9:16 slice of a 16:9 frame is narrow. Take the full height and keep a width of height × 9 ÷ 16. At 720p that is 405 pixels, which ffmpeg rounds to 404 because the common H.264 format needs even sizes. At 480p it is 270. A common size for a 9:16 upload is 1080×1920, so the crop has to be scaled up.

Scaling up does not add detail. A 404-pixel slice stretched to 1080 pixels wide will look softer than a clip made vertical from the start, and a 270-pixel slice from 480p softer still. For a clip you plan to crop, the 720p render is worth its cost: on this site it is 2 credits per second instead of 1, so 10 credits for 5 seconds instead of 5 (pricing guide). Test the motion at 480p first if you like, then render the keeper at 720p.

Plan the first frame for a vertical crop

The crop decision starts before you press Generate. Every clip opens on your image, and by default fal fits that image to 16:9 with a center crop (fal). A centered 9:16 crop then keeps only the middle band of that. Plan for both cuts.

Put the subject in the middle third

Frame the still so the subject — a face, a product, a cup of coffee — sits inside the central third of a widescreen picture, with its full height in frame. Anything in the left and right thirds is likely to be cut from the vertical version. If the subject must sit off-center, you can move the crop window instead (the ffmpeg section shows how), but the window has a fixed position for the whole clip.

Ask for motion that stays in that band

A sideways camera pan or a subject walking out of frame works in 16:9 and breaks in a fixed vertical slice, because the subject leaves the window. Vertical-friendly motion stays roughly in place: a slow push-in, hair or fabric moving in the wind, steam rising, a blink, a head turn, clouds drifting behind a centered subject. Say what should stay still as well. The prompt guide has wording you can adapt. None of this guarantees where the model moves things; check the 16:9 clip before you crop it.

Do not start from a tall phone photo

A vertical photo seems like the natural source for a vertical clip, but it loses the most. On a 1080×1920 photo, the default 16:9 center crop keeps a 1080×608 strip, and a 9:16 slice of that strip is about 342×608. That is roughly 10% of the original photo. If the shot is vertical, crop it to widescreen yourself first, choosing a wide band around the subject, or pick a model that keeps the shape of your start image.

Crop or pad with ffmpeg

Download the finished MP4 from My videos first; the preview player is not the file. If Download MP4 does not save anything, see the troubleshooting guide. We ran each command below with ffmpeg on 1280×720 and 832×480 test clips at 16 fps; each produced a 1080×1920 MP4 of the same length.

Center crop to full-screen 9:16

ffmpeg -i clip.mp4 -vf "crop=ih*9/16:ih,scale=1080:1920:flags=lanczos,setsar=1" -c:v libx264 -crf 18 -pix_fmt yuv420p vertical.mp4

crop=ih*9/16:ih keeps the full height and a centered 9:16 width. To keep the left edge instead, add the offset: crop=ih*9/16:ih:0:0. For the right edge use crop=ih*9/16:ih:iw-ow:0.

Keep the whole clip, blurred background behind it

ffmpeg -i clip.mp4 -filter_complex "[0:v]scale=1080:1920:force_original_aspect_ratio=increase,crop=1080:1920,boxblur=20:2[bg];[0:v]scale=1080:-2[fg];[bg][fg]overlay=(W-w)/2:(H-h)/2,setsar=1" -c:v libx264 -crf 18 -pix_fmt yuv420p vertical-padded.mp4

The first branch fills the 9:16 frame with a blurred, enlarged copy of the clip. The second scales the sharp clip to 1080 pixels wide and lays it across the middle. Nothing from the original frame is cut, which suits clips where the motion moves across the picture.

Without the command line

Any editor that can make a 9:16 project does the same job. The steps are the same in most of them:

1. Create a vertical project, 1080×1920 if the editor asks.
2. Import the 16:9 MP4 and drop it on the timeline.
3. Scale the clip to fill the frame for a full-screen crop, or to fit the width for the band layout. Slide it left or right if the subject is off-center.
4. For the band layout, put a blurred copy, a solid color or a title above and below it.
5. Add sound, then export.

When to use a model that renders vertical

Cropping makes sense for cheap tests and for shots composed around a centered subject. It is a poor fit when the clip needs full vertical detail, when the motion uses the whole frame, or when you need sound. In those cases render with a model that outputs 9:16 directly. Our Mischief 1 vs Kling comparison covers one with vertical, square and audio output, and the alternatives page lists others. Check each model's official page for its current aspect ratios. A workable split: test the idea and the motion cheaply with Mischief 1, then render the final vertical version on a model built for it.

• Crop Mischief 1: centered subject, motion stays in place, low cost matters, softness is acceptable.
• Pad Mischief 1: the whole widescreen frame matters and a band layout is fine.
• Render vertical elsewhere: the final ad or post needs full-screen detail, sound, or more than 5 seconds.