Guide
Shoot as big as you like. Hand over 1080 by 1920
Filming in 4K is worth it and uploading in 4K usually is not, because those are two separate decisions that people keep answering together. Capture resolution buys you room to reframe and crop. Delivery resolution only decides what a re-encode you do not control has to chew through before anyone sees it.
- The delivery frame for every vertical feed
- 1080x1920
- Of a 4K frame you can crop and still fill it
- 72%
- Decisions people answer as one
- 2
Capture is about options, delivery is about what survives the trip
When you film, extra resolution is stored information. You can punch in, reframe a wobbly shot, or crop a horizontal take to vertical without losing detail, because you had detail to spare.
When you deliver, extra resolution is not information any more. It is a bigger file handed to a platform that is going to re-encode it into its own format regardless.
Nothing about your upload controls that re-encode. You do not choose the codec, the bitrate ladder or the target resolution, and no export setting persuades any of them to skip the step.
So the two questions have different answers. Capture high because it costs you nothing but storage. Deliver at the frame the player was built around.
Two decisions that are not the same decision
Answering them together is why so much advice on this contradicts itself. They are optimising for different things.
| Capture resolution | Delivery resolution | |
|---|---|---|
| What it buys | Reframing and crop room | Almost nothing |
| Who controls what happens next | You do | The platform does |
| Cost of going higher | Storage and heat | Upload time, no gain |
| Sensible answer | As high as your phone allows | 1080 by 1920 |
What high resolution capture actually buys a vertical ad
The biggest win is crop. A 4K horizontal take holds enough pixels to cut a full 1080 wide vertical frame out of the middle with detail to spare, which turns one filmed take into footage you can reframe twice.
The second is the punch-in. Scaling into a shot by ten or twelve percent is a standard way to keep a talking head from feeling static, and on a 1080 source that scale is real softness while on a 4K source it is free.
The third is repair. A shot framed slightly off centre, a head sitting too low, a stray object at the edge: all fixable when you have pixels outside the frame you are delivering.
None of those benefits require you to upload the big file. They are all spent during the edit and are already baked into the 1080 frame that comes out.
How much frame you can crop away and still fill 1080 wide
This is the whole practical argument for filming big. It is about what you can throw away, not what you can upload.
- Filmed at 1080 wideno room
- Filmed at 1440 wide25% to spare
- Filmed at 4K, 3840 wide72% to spare
This is the whole editor
Highlight a phrase and a clip lands on those exact words. No timeline, no keyframes, no layers.
Why the delivery frame is 1080 by 1920 and not something cleverer
It is the shape every vertical feed is designed around. Nine by sixteen at 1080 wide fills a phone screen without the player having to scale anything before it draws.
It is also the frame the safe areas are described in. Caption placement, the space the interface takes at the top and bottom, and the right hand column of buttons are all reasoned about in this frame, so working in it means what you see is what viewers get.
Thirty frames a second is the other half of it. Higher frame rates exist and short-form players handle them unevenly, and a talking head gains nothing from sixty.
Every Cutroom export is 1080 by 1920 at thirty frames a second and there is no other option. That is the right default for a feed and it is a genuine limitation if you need a horizontal master or a broadcast deliverable, in which case this is not your tool.
When sending more than 1080 is the right call
Archive masters. Keep the highest quality version you have, because you will re-cut it, and every generation you edit from a compressed file is worse than the last.
Client delivery. If somebody else is going to edit or grade your footage, hand them the biggest file you have and let them decide what to throw away.
Anything not destined for a phone feed. A video that will play on a television, in a shop window or on a desktop landing page is a different delivery target with different rules.
For the feed itself, the honest summary is that nobody has been able to show a reliable quality gain from uploading 4K to a vertical short-form platform. Film big, deliver 1080, spend the difference on the script.
Questions people ask
- Does uploading 4K actually make my video look worse?
- Not necessarily worse, just not better. The platform re-encodes it either way. What you get for certain is a longer upload and a bigger file for no measurable gain in the feed.
- Should I film in 4K if I only ever post vertical?
- Yes, if your phone does it without overheating. The crop room is what lets you fix framing later and punch in without softening the picture.
- What about 60 frames per second?
- For a person talking, no. Higher frame rates help with fast motion and cost you bitrate everywhere else. Thirty is what short-form players are happiest with.
- Can Cutroom export anything other than 1080 by 1920?
- No. Every export is a vertical MP4 at that frame size and thirty frames a second. If you need horizontal, square or a higher resolution master, use a timeline editor instead.
Film with room to spare, deliver the frame the feed was built for, and stop spending upload time on pixels nobody will ever see. Ours come out at 1080 by 1920 because that is the only frame the destination actually uses.