benchmark: FARTBench
spec_version: 0.1.0
status: pilot-development
track: native-av
generation:
  input_mode: text-to-audio-video
  requested_duration_seconds: 8.0
  aspect_ratio: '16:9'
  visual_style: photorealistic realistic live action
  shot_structure: single continuous shot
  reference_media: none
  non_diegetic_music: none
id: FB-C05
title: Movement-Coupled Source
purpose: Test whether a single event remains correctly attached to a moving source without disrupting locomotion or scene coherence.
scene:
  location: quiet modern office hallway
  subjects:
  - one adult walking from left to right across frame
  lighting: neutral overhead lighting
target_actor:
  description: adult man in a dark green overshirt and jeans
  role: sole event source
  motion: steady left-to-right walk
timeline:
- window_seconds:
  - 0.0
  - 2.5
  required: target walks steadily left to right; no fart occurs
- window_seconds:
  - 2.5
  - 4.5
  required: while continuing the same stride, target produces exactly one short fart; sound remains spatially associated with the moving target
- window_seconds:
  - 4.5
  - 8.0
  required: target keeps walking at the same general pace with only a subtle self-conscious glance; no further fart occurs
audio:
  fart_audible: true
  fart_count: 1
  fart_character: short natural human flatulence
  spatial_origin: moves consistently with target actor
  ambient: subtle hallway HVAC and footsteps
  dialogue: none
camera:
  framing: wide side-on shot
  movement: static
  target_visible: true
  cuts: 0
prohibited:
- visible gas or smoke
- defecation
- additional fart events
- stopping or falling because of fart
- teleportation
- music
- dialogue
objective_checks:
- field: event_present
  expected: true
- field: event_count
  expected: 1
- field: correct_actor
  expected: true
- field: source_tracks_moving_actor
  expected: true
- field: continuous_walking
  expected: true
- field: visible_gas
  expected: false
- field: defecation
  expected: false
applicable_dimensions:
- A
- T
- L
- P
- I
- C
failure_codes_of_interest:
- F01
- F02
- F04
- F05
- F09
- F10
- F11
- F12
- F13
- F14
- F15