Rendering pipelines

A named pipeline is an ordered list of typed operations. Artifacts reference a pipeline through a rendition. AASG validates its shape before executing FFmpeg or image work.

pipelines:
  social-video:
    frame_rate: 30
    crf: 18
    steps:
      - type: gesture_overlay
        color: "#FFFFFF"
        halo_color: "#000000A0"
        radius_px: 44
        trail: true
        motion: standard

Available operations

Operation	Purpose
resize	Resize with contain, cover, or stretch fit.
crop	Crop literal coordinates or a named semantic region.
pad	Place media on a colored canvas.
background	Apply one color or a theme-keyed color map.
blur	Blur a frame or image by sigma.
redact	Blur or cover named semantic regions.
device_frame	Place media into a verified frame asset.
edge_fade / feather	Fade selected edges or soften the alpha boundary.
trim / temporal_fade	Trim and fade video over time.
gesture_overlay	Render recorded taps, swipes, and drags over video.

gesture_overlay may appear only once and must be the first step because its coordinates refer to the untouched source video. It requires a video artifact with metadata and show_taps: false on the capture.

Process media outside a capture

Run a pipeline against an existing file with the same validation rules:

aasg process social-video raw.mp4 --metadata raw.metadata.json --output promo.mp4

Pass --theme only when a pipeline uses a theme-keyed background color. Detailed field definitions are in the schema reference.