Built-in programs

Find the callable programs that create or transform Video and Audio values.

ClipAsm registers these programs and uses normal call syntax for them. Imported source programs use the same call model. Separate documentation describes language forms such as clip and stack blocks. These forms do not appear in clipasm programs.

The type shapes below are lookup notation, not ClipAsm declaration syntax. See statements and calls for authored syntax.

Program catalog

Sources

Program	Summary	Type shape	Properties
`image`	Create a Video from an image file.	`() -> Video`	—
`video`	Load a Video from a video file.	`() -> Video`	—
`audio`	Load standalone Audio from an audio file.	`() -> Audio`	—

Timeline

Program	Summary	Type shape	Properties
`concat`	Concatenate one or more homogeneous timelines.	`(T...) -> T`	generic
`repeat`	Repeat a Video or Audio timeline.	`(T) -> T`	generic
`trim`	Keep a selected range of a Video or Audio timeline.	`(T) -> T`	generic
`drop`	Remove one Video or Audio value from the stack.	`(T) -> none`	generic

Audio

Program	Summary	Type shape	Properties
`extract_audio`	Extract the meaningful Audio from a Video.	`(Video) -> Audio`	—
`set_audio`	Replace a Video’s Audio with standalone Audio.	`(Video, Audio) -> Video`	—

Effects

Program	Summary	Type shape	Properties
`zoom_in`	Apply a linear zoom-in effect to a Video.	`(Video) -> Video`	—

Transitions

Program	Summary	Type shape	Properties
`flash_cut`	Join two Videos with a brief white-flash transition.	`(Video, Video) -> Video`	—
`crossfade`	Overlap two Videos or Audio values with a crossfade transition.	`(T, T) -> T`	generic

Body programs

Program	Summary	Type shape	Properties
`join`	Transform and concatenate two Video or Audio timelines in a body.	`(T, T) -> T`	generic, accepts a body
`during`	Replace a selected timeline range with the result of a body.	`(T) -> T`	generic, accepts a body

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