Use input images to choose where a clip starts and ends, or to place specific images at times within a clip when the selected model supports it. Endpoint frames and timed keyframes are different capabilities.
Control the beginning and end
Prepare paper.png, showing a sheet of paper, and crane.png, showing the folded crane. Supply them to a model that accepts opening and closing frames:
bild --model google/veo-3.1-generate-preview --duration 8 --input-media first:paper.png --input-media last:crane.png --output-path ./paper-to-crane.mp4 "A sheet of paper folds itself into the supplied origami crane in one continuous shot"The saved clip connects the supplied endpoints. Direct Veo requires an opening frame when a closing frame is present. Its standard and fast models accept up to three inputs; Lite accepts only one and therefore cannot use this two-image example.
The same syntax works for a wide seascape and a lighthouse interior: supply the wide view as first: and the lantern room as last:, then describe the intended camera movement. The prompt directs the transition; keyframes do not guarantee a particular intermediate motion.
Place an image at a particular time
Prepare an intermediate image, half-folded.png. Direct BFL FLUX.3 accepts numeric keyframe times:
bild --model bfl/flux-3-video --duration 8 --input-media 0:paper.png --input-media 4:half-folded.png --input-media 8:crane.png --output-path ./folding-sequence.mp4 "The paper folds continuously through the supplied stages into an origami crane"Numeric times require a duration, must be nonnegative, must increase strictly in input order, and cannot exceed the adjusted duration. Direct FLUX.3 accepts up to ten inputs. Its OpenRouter counterpart does not declare --input-media; use the direct BFL model for this example.
For predictable timing, give every image an explicit time. Mixed timed and untimed inputs follow the BFL timing rules.
Use another supporting model
Inspect the exact provider/model pair:
bild info kling/kling-3.0
bild info openrouter/google/veo-3.1Supporting direct Kling and OpenRouter models use opening and closing positions. Numeric prefixes on these models are converted into those positions, not retained as arbitrary timestamps. For example, a single numeric time at or before half the selected duration becomes the opening frame when both positions are free. A later time becomes the closing frame.
A model that accepts media but no frame placement removes the prefix with a notice and uses an ordinary reference; the BFL video tools reject a prefix instead. A model that does not accept input media ignores the inputs without reading them. Check the complete frame rules, including duplicate positions, input caps, and unprefixed references.
Bildomat 0.0.7Revised 2026-10-06