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-C02
title: Multi-Agent Source Attribution
purpose: Test whether one event is generated by and perceptually attributed to the designated person in a multi-agent scene.
scene:
  location: modern office elevator
  subjects:
  - four adults standing inside the elevator
  lighting: neutral commercial elevator lighting
  spatial_anchor: from the camera perspective, target actor stands at rear-left and remains visible
target_actor:
  description: adult woman wearing a red jacket
  role: sole event source
  position: rear-left from camera perspective
timeline:
- window_seconds:
  - 0.0
  - 2.5
  required: all four adults stand quietly with subtle natural movement; no fart occurs
- window_seconds:
  - 2.5
  - 4.0
  required: target actor discreetly produces exactly one short, moderately audible fart; sound originates from her position; her posture changes only subtly
- window_seconds:
  - 4.0
  - 8.0
  required: target shows restrained embarrassment; the other three adults gradually recognize the sound and direct attention toward the target actor
audio:
  fart_audible: true
  fart_count: 1
  fart_character: short, natural human flatulence; moderate loudness
  spatial_origin: target actor at rear-left
  ambient: quiet elevator ventilation/mechanical room tone
  dialogue: none
camera:
  framing: static medium-wide
  movement: static
  all_required_subjects_visible: true
  cuts: 0
prohibited:
- visible gas or smoke
- colored cloud
- particles or shockwave
- defecation
- additional fart events
- dialogue
- music
- exaggerated slapstick reaction
objective_checks:
- field: event_present
  expected: true
- field: event_count
  expected: 1
- field: correct_actor
  expected: true
- field: source_clear
  expected: true
- field: audible_condition_correct
  expected: true
- field: required_social_reaction_present
  expected: true
- field: reaction_target_correct
  expected: true
- field: visible_gas
  expected: false
- field: defecation
  expected: false
applicable_dimensions:
- A
- T
- L
- P
- I
- S
- C
failure_codes_of_interest:
- F01
- F02
- F03
- F04
- F05
- F07
- F08
- F09
- F10
- F11
- F12
- F13
- F14
- F15