SubRip and WebVTT sidecars plus multi-track containers (forced-narrative, SDH and styled tracks in one file) for testing track selection, default flags and caption rendering in players.
Each card starts with one representative test file. Choose a use case, search, or filter to find a specific profile; a card’s variant menu contains its related samples.
13 test families · 26 available files · Page 1 of 1
Subtitle Tracks
WebVTT muxed inside a WebM container, which the Matroska specification allows and almost nothing consumes. No browser surfaces an embedded WebVTT track through the HTML TextTrack API (the web platform expects a separate
Multi Track
Everything this phase covers in one file: two audio languages, three subtitle tracks including SDH, four chapters, an attached cover image and container tags, with every language tag and disposition set correctly. This
Subtitles
A SubRip (SRT) subtitle track with three timed cues: the most common subtitle format. Paired with the WebVTT twin for testing subtitle parsers and SRT↔VTT conversion.
Colour Audio Sync Failures
Download-only WebVTT caption sidecar 01 with one sub-second cue for timing and attachment checks. Stable P8 artifact p8-video-caption-vtt-01.
Colour Audio Sync Failures
Download-only WebVTT caption sidecar 02 with one sub-second cue for timing and attachment checks. Stable P8 artifact p8-video-caption-vtt-02.
Colour Audio Sync Failures
Download-only WebVTT caption sidecar 03 with one sub-second cue for timing and attachment checks. Stable P8 artifact p8-video-caption-vtt-03.
Colour Audio Sync Failures
Download-only WebVTT caption sidecar 04 with one sub-second cue for timing and attachment checks. Stable P8 artifact p8-video-caption-vtt-04.
Colour Audio Sync Failures
Download-only WebVTT caption sidecar 05 with one sub-second cue for timing and attachment checks. Stable P8 artifact p8-video-caption-vtt-05.
Colour Audio Sync Failures
Download-only WebVTT caption sidecar 06 with one sub-second cue for timing and attachment checks. Stable P8 artifact p8-video-caption-vtt-06.
Colour Audio Sync Failures
Download-only WebVTT caption sidecar 07 with one sub-second cue for timing and attachment checks. Stable P8 artifact p8-video-caption-vtt-07.
Colour Audio Sync Failures
Download-only WebVTT caption sidecar 08 with one sub-second cue for timing and attachment checks. Stable P8 artifact p8-video-caption-vtt-08.
Colour Audio Sync Failures
Download-only WebVTT caption sidecar 09 with one sub-second cue for timing and attachment checks. Stable P8 artifact p8-video-caption-vtt-09.
Colour Audio Sync Failures
Download-only WebVTT caption sidecar 10 with one sub-second cue for timing and attachment checks. Stable P8 artifact p8-video-caption-vtt-10.
