How to turn four seconds of footage into a seamless loop
Give Vizard Agent the exact in and out points and say the result must read as one continuous shot. A loop is not a clip played five times: the end has to become the beginning through synthesised frames, and the whole job lives or dies at that one join.
What do you type into Vizard Agent?
Specify the range and the standard in one message. "No visible restarts, cuts, jumps, flicker or freeze frames" is a list of the five ways a loop fails, and stating them turns a vague request into an acceptance test. A range whose first and last frames are similar makes the join far easier for Vizard Agent.
Prompt
What does Vizard Agent actually do?
Repeating four seconds five times gives the viewer four restarts they can see. The craft is at the join. Start and end frames that nearly match need almost no synthesis, ones that differ need several invented frames, and a seam that looks fine at playback speed can look wrong on the third viewing. In the session behind this article it:
- Sampled the requested four-second segment, viewed the frames to understand the motion, and checked what motion interpolation and local optical-flow frame synthesis were available.
- Compared the exact start and end frames before choosing how to join them, recovering the comparison frames when the endpoint extraction errored.
- Built the twenty-second loop, verified its exact properties and reviewed it at regular intervals for visual continuity.
- Inspected the synthesised seam frame by frame, found a corrupted frame and rebuilt without it.
- Traced the bad frame to the original source range rather than the blend, verified the usable range and rendered from frame-accurate timestamps.
When does this not work well?
Some footage can't be looped at all. Anything with a clear direction of travel, like a car crossing the frame or a person walking through it, ends up somewhere different from where it started, and no blending by Vizard Agent hides that. Changing light shows at the join, a blended face is immediately wrong, and a pan has to return to its start.
Common questions
How long can a loop be? As long as you like. Vizard Agent builds the length you ask for.
What if the source has a flicker? Vizard Agent finds it in the source rather than blaming the join.
Does it need the original file? Yes. A re-encoded copy makes frame-accurate work harder.