media/reframe

Vertical reframe pipeline — face detection + subject tracking + 9:16 crop.

Category: media
Source: workflows/media/reframe.py

Input Schema

Field	Type	Default	Description
media_path	object	required
regenerate	object	—	When set, this run is a regeneration. Workflows may read direction / keep / extra_instructions to modulate prompts; the engine persists parent_run_id and parent_variant_index as run lineage columns.
tracking_data	object	—
variants	integer	1	Number of independent variant executions (1–10). When > 1, the engine runs the workflow N times with different sampling, producing N outputs.
video_height	object	—
video_width	object	—

Output Schema

No schema defined.

Task Pipeline

detect_and_track_subjects → crop_to_vertical

Task	Description
detect_and_track_subjects	Detect faces and track subjects across frames using MediaPipe + YOLO.
crop_to_vertical	Crop video to 9:16 vertical following tracked subjects.

Run-spec example

Save the YAML below as my-run.yaml, edit the values, and run with the CLI or POST it to the API. Required fields are uncommented; optional knobs are documented above the input: block — copy any line under input: and uncomment to set.

workflow: media/reframe

# Optional fields — copy any line(s) under `input:` and uncomment to set:
#   tracking_data: null
#
#   video_height: null
#
#   video_width: null
#

input:
  media_path: ""

Run it locally:

fab-workflow --from-file my-run.yaml

Or submit over the wire — the same file is the request body:

curl -X POST 'https://gofabric.dev/v1/workflows/runs?name=media/reframe' \
  -H 'Authorization: Bearer fab_xxx' \
  -H 'content-type: application/yaml' \
  --data-binary @my-run.yaml

Every workflow also accepts the universal WorkflowInput fields — variants (1–10 fan-out) and regenerate (creative-direction hints with run lineage). See Run-specs (YAML / TOML / JSON) for the full top-level shape (metadata, priority, bundle, parent, etc.).

Warnings

• Last user task crop_to_vertical has no Pydantic return type — workflow output schema is null. Declare a WorkflowOutput subclass and pass it to Flow(output=…) for a strict contract.