How to generate 3D model from video? Shooting duration, movement speed and uploading guidelines
This article introduces the shooting duration, shooting route, moving speed, definition requirements and common failure reasons for using mobile phone videos to generate 3D models.
Video generation 3D models essentially select available frames from consecutive video frames for three-dimensional reconstruction. Video capture is easier to get started than shooting photos manually, but fast movement, motion blur, automatic exposure changes, and invalid repeating frames can also reduce the quality of the footage.
How long should the video be?
The duration should cover the main surface and occluded areas of the object, not longer the better. The current upload portal of MeTop.ai Space supports videos from 30 seconds to 3 minutes, and a maximum of 3 videos can be uploaded. Small products can slowly complete a circle around the subject and re-shoot the top; the spatial scene should move in a continuous route and slow down at corners and important areas.
Why movement speed matters
Moving too fast will cause motion blur, and the angle of view of adjacent frames may change too much; staying in place for too long will produce a large number of duplicate frames. You should keep a constant speed when shooting so that the same details in the picture can appear continuously. You should slow down appropriately when turning, moving up and down, and approaching details, and avoid suddenly shaking your phone or zooming frequently.
What settings should you pay attention to when shooting videos?
Try to maintain the same focal length and stable exposure, and do not switch lenses during the shooting process. The lighting should be even so that one side of the subject is not overexposed and the other side is completely lost in detail. The subject should remain still and the background should be kept to a minimum with moving people, swaying leaves, and rapidly changing screen content.
How to choose between videos and photos
Videos are suitable for quick collection and for ordinary users to get started; photos make it easier to control the clarity, exposure and composition of each perspective. Professional projects can first use video to verify the scene, and then supplement it with photos, LiDAR or drone footage based on the results. Ultimately, the collection method should be selected based on the object material, scene scale, whether measurement is required, and the output format.
Frequently asked questions
Can videos captured on mobile phones be directly generated into 3D models?
Can. The video needs to move continuously around the object or along space, with clear picture, stable exposure and the object remaining still. The system will extract available frames from the video to complete reconstruction.
Is 4K video better than 1080P?
uncertain. Resolution is only one factor, motion blur, frame overlap, lighting, materials and compression quality are equally important. Clear and stable 1080P footage may be better than fast-shaking 4K video.