Market walk: scrub-preview index
The WebVTT index for the sprite sheet in this group: 24 cues, one per second, each naming a rectangle of the sheet with an xywh media fragment. The sheet and this index are each useless alone, which is why they are paired.
vtt
text/vtt
- Film
- film-market-walk
- Duration Seconds
- 24
- Segments
- 12
- Synthetic
- true
- Disclosure
- AI-generated / synthetic video. Not a recording of a real person, place or event.
- Schema Version
- 1
Binary vtt: no in-browser preview. Download it above to open in a compatible application.
Specifications
- Film
- film-market-walk
- Duration Seconds
- 24
- Segments
- 12
- Synthetic
- true
- Disclosure
- AI-generated / synthetic video. Not a recording of a real person, place or event.
- Schema Version
- 1
- Cues
- 24
- Cue Kind
- sprite-index
- Fragment Syntax
- xywh
Testing contract
Expected to pass- Scenario
- Resolve every cue's media fragment against the sprite sheet.
- Expected result
- All 24 fragments resolve inside the sheet's 960x360 bounds, and no two cues name the same rectangle.
What is a .vtt file?
WebVTT (VTT) is the W3C subtitle and caption format used by the HTML5 <track> element for timed text on the web. It extends the SubRip model with cue settings, positioning, styling, and metadata, and requires a WEBVTT header. It is the standard format for browser-based captions.
How to use this file
Use an example VTT to test HTML5 <track> caption rendering, cue-setting and positioning parsers, and converters between WebVTT and SRT.
How to use this file for testing
“Market walk: scrub-preview index” is a deterministic Novus Examples fixture for Subtitle parsing, Media handling. The same captions written out across SubRip, WebVTT, ASS/SSA, SBV, TTML and a synced LRC lyric file, with known timings, for exercising subtitle parsers, format converters and burn-in tools against every serialisation.
Documented properties for this file: 24 cues. Compare results against paired or grouped companions on this page when present (clean↔damaged, searchable↔scanned, or format twins) so scores stay reproducible across runs.
Download the file once, keep the path stable in CI or local scripts, and treat the spec table as the contract: dimensions, seeds, field lists, and roles are intentional. Corrupt or invalid samples are labelled as such, expect parsers to fail loudly rather than silently accept them.
Media fixtures are short and synthetic by design. Prefer waveform or transcript ground truth in the same group when measuring ASR, trim, upscale, or sync tools; do not assume broadcast-quality masters.
Parse the cues and check timings against the documented count; the same captions ship across subtitle formats so you can diff a converter against a known target.
Code examples
<video controls src="clip.mp4">
<track kind="captions" srclang="en" label="English" src="film-market-walk-thumbs.vtt" default>
</video>Related files
- vttCoast drift: scrub-preview indexThe WebVTT index for the sprite sheet in this group: 24 cues, one per second, each naming a rectangle of the sheet with an xywh media fragment. The sheet and this index are each useless alone, which is why they are paired.
- vttStreet at dusk: scrub-preview indexThe WebVTT index for the sprite sheet in this group: 24 cues, one per second, each naming a rectangle of the sheet with an xywh media fragment. The sheet and this index are each useless alone, which is why they are paired.
- mp4Coast drift: 24-second continuous filmA 24 second 512x288 H.264 film at 24 fps, 576 frames, written with the moov atom first so it can be seeked before it has finished downloading. Twelve generated segments crossfaded into one continuous take. Across 575 transitions the mean inter-frame change is 0.0139 and the strongest single transition is 0.1614, with 0 above 0.3. A deliberate hard cut between two unrelated films measures 0.311 by the same method, so the worst join here sits 0.1496 below a real cut. At eleven times the length of any other clip in this library, it is the only footage here long enough to seek through, chapter, or scrub. Stylised rather than photographic: this is the 1.3B model at 512x288, the subject drifts over 24 seconds, and a dark rendering artefact recurs in a few frames. It is a fixture for duration, seeking and stitch measurement, not showcase footage.
- vttCoast drift: chapter trackA WebVTT chapter track for the 24 second film in this group, with 12 cues at 2.125 second intervals. The cues are not decoration: each one marks a boundary between two of the twelve generated segments, verified against the measured transitions, so seeking to a cue lands on a join. Chapter tracks over two-second clips have nowhere to seek to; this is the first in this library with somewhere to go.
- mp4Street at dusk: 24-second continuous filmA 24 second 512x288 H.264 film at 24 fps, 576 frames, written with the moov atom first so it can be seeked before it has finished downloading. Twelve generated segments crossfaded into one continuous take. Across 575 transitions the mean inter-frame change is 0.0206 and the strongest single transition is 0.2395, with 0 above 0.3. A deliberate hard cut between two unrelated films measures 0.311 by the same method, so the worst join here sits 0.0715 below a real cut. At eleven times the length of any other clip in this library, it is the only footage here long enough to seek through, chapter, or scrub. Stylised rather than photographic: this is the 1.3B model at 512x288, the subject drifts over 24 seconds, and a dark rendering artefact recurs in a few frames. It is a fixture for duration, seeking and stitch measurement, not showcase footage.
- vttStreet at dusk: chapter trackA WebVTT chapter track for the 24 second film in this group, with 12 cues at 2.125 second intervals. The cues are not decoration: each one marks a boundary between two of the twelve generated segments, verified against the measured transitions, so seeking to a cue lands on a join. Chapter tracks over two-second clips have nowhere to seek to; this is the first in this library with somewhere to go.
Generated by generation/comfy_film_wave.py. Free for any use, no attribution required, license.