Quick answer
A transparent mockup video stores the device animation and its alpha channel in a MOV file, leaving the surrounding pixels transparent. It is designed for compositing over footage, graphics, slides, or branded backgrounds in another editor.
When this workflow is useful
Choose transparent export when the mockup is one layer inside a larger campaign. Use a normal MP4 when the background, text, audio, and final composition are already complete inside freemockup.video.
Explore the 3D device mockup video generator for a focused creation workflow and a clear comparison of Free and Pro capabilities.
Step-by-step workflow
- Design for compositing. Keep the device inside the frame and leave enough transparent space for rotation, shadows, and camera motion.
- Remove the scene background. Select the transparent export workflow instead of relying on a black, white, or green background.
- Preview edge quality. Inspect corners, reflections, shadows, and fast motion. Semi-transparent pixels should remain smooth rather than turning into a dark halo.
- Export the MOV. Render the transparent master at the resolution required by the final edit. Preserve the original file rather than repeatedly re-encoding it.
- Composite in the destination editor. Place the MOV above the background layer in Premiere Pro, Final Cut Pro, DaVinci Resolve, or another editor that supports alpha video.
Decisions that improve the result
MOV versus MP4
MP4 is widely supported but does not normally preserve an alpha channel. Transparent MOV is larger but suited to layered post-production.
Shadows
A soft device shadow may be useful on many backgrounds, but verify that it does not look dirty over light colors or disappear over dark footage.
Resolution
Export at the final or higher delivery resolution so resizing does not soften the device edges and interface.
Production checklist
- Transparent export selected
- Device stays inside frame
- Clean alpha edges
- Correct resolution
- Destination editor supports alpha
- Master file archived
Frequently asked questions
Why does transparency look black in some players?
Some video players display transparent pixels against black even when the alpha channel is present. Test the file over another layer in an editor.
Can MP4 have a transparent background?
Standard MP4 workflows generally do not preserve transparency. Use the supported transparent MOV option for compositing.
Should I use a green screen instead?
A real alpha channel avoids chroma-key spill and usually produces cleaner reflections and edges.