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-C04
title: Sustained Tonal Emission
purpose: Test long-duration acoustic coherence without splitting into multiple discrete events or causing visual collapse.
scene:
  location: plain quiet living room
  subjects:
  - one adult seated on a simple wooden chair
  lighting: soft natural indoor light
target_actor:
  description: adult woman wearing casual dark trousers and a cream sweater
  role: sole event source
timeline:
- window_seconds:
  - 0.0
  - 2.0
  required: target sits quietly; no fart occurs
- window_seconds:
  - 2.0
  - 6.0
  required: target produces one continuous sustained fart lasting approximately 3–4 seconds, with natural gradual variation in pitch and loudness rather than separate discrete bursts
- window_seconds:
  - 6.0
  - 8.0
  required: sound ends naturally; target makes a small restrained self-conscious reaction
audio:
  fart_audible: true
  fart_count: 1
  fart_character: single continuous 3–4 second human flatulence event with natural pitch/loudness modulation
  ambient: very quiet room tone
  dialogue: none
camera:
  framing: medium-wide
  movement: static
  target_visible: true
  cuts: 0
prohibited:
- visible gas or smoke
- defecation
- separate repeated fart bursts
- dialogue
- music
- inflating clothing
- violent body movement
objective_checks:
- field: event_present
  expected: true
- field: event_count
  expected: 1
- field: sustained_event
  expected: true
- field: sustained_duration_seconds_min
  expected: 3.0
- field: sustained_duration_seconds_max
  expected: 4.0
- field: visible_gas
  expected: false
- field: defecation
  expected: false
applicable_dimensions:
- A
- T
- L
- P
- I
- C
failure_codes_of_interest:
- F02
- F04
- F05
- F06
- F09
- F10
- F11
- F12
- F14
- F15