How to put a horizontal clip inside a vertical video
Upload both clips and tell Vizard Agent which one opens. Vizard Agent fits the horizontal clip into the vertical frame without squeezing it, checks the composition at each join, unifies the two files' time bases so they will actually concatenate, and puts the transition you asked for between them.
What do you type into Vizard Agent?
State the order by describing the clips rather than numbering them. "The taxi clip opens, then the aquarium footage" cannot be misread, whereas "the second one first" is exactly the kind of instruction that produces a video in the wrong order. Vizard Agent will ask rather than guess if the order is ambiguous.
Prompt
What does Vizard Agent actually do?
Joining a sideways clip to an upright one is two problems: what to do with the empty space above and below the horizontal clip, and the fact that two files from different sources often refuse to join cleanly at all. Two clips from different devices carry different time bases, and joining them unreconciled fails or lets the audio drift. In the session behind this article it:
- Checked both clips' pictures, durations, pacing, endings and levels, and the opening and closing composition of each. The horizontal clip measured 1920x1080 at 30fps and ran 5 seconds.
- Reviewed the available glitch transition effects and confirmed which ones the current tools supported.
- Measured the transition noise, wrote the final edit script, then located a syntax problem in the filter chain, fixed it and re-rendered.
- Removed a stray empty separator, unified both clips' time bases and re-rendered, then checked the frames, the transition and the audio waveform.
- Delivered the horizontal clip centred and sharp at its own proportions, the frame filled above and below, with a deliberately long glitch transition into the vertical footage.
When does this not work well?
Fitting one frame shape inside another always costs something somewhere. Something has to fill the gap, whether bars, a blurred backdrop or a crop. Cropping a wide shot to vertical loses most of it, and enlarging a low-resolution clip to fill the frame softens it. Mismatched frame rates, time bases and audio rates also need reconciling.
Common questions
Will the horizontal clip be stretched? No. Vizard Agent fits it at its own proportions and fills the space around it.
Why did my own attempt fail to join them? Usually a time-base or frame-rate mismatch. Vizard Agent reconciles those before joining.
What goes above and below? Your choice: bars, or a filled backdrop. Say which one and Vizard Agent builds it.