Short 270p clips with known scene cuts, freezes, black frames, flash frames, and burned-in captions, for detection and QC tooling.
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.
166 test families · 514 available files · Page 1 of 10
Alpha
The same codec and container with NO alpha plane, as the control for the alpha clip in this group. Useful for checking that alpha detection reads the pixel format rather than assuming every WebM is transparent, and for c
Captions Edge
Advanced SubStation Alpha using the features that distinguish it from SubRip: per-syllable \k karaoke timings in centiseconds, a full V4+ style definition with primary and secondary colours, and an \an override that repo
Base Plates
A 24-patch chart drifting slowly so it is genuinely moving footage rather than a still. Patch values are fixed and documented, so colourisation and colour-management output can be measured per patch. The values are ficti
Structure
Every frame is an I-frame, so any frame is an independent cut point. Much larger, and the shape editing and frame-accurate seeking want. Same picture and same codec as every other clip in this group; only the GOP and fra
Chapters
Four named chapters (Cold Open, Titles, Main Segment, Credits) on two-second boundaries. The clip burns the chapter name and a running timecode into the picture, so the chapter marks can be verified by eye against what t
Generated Films · Synthetic realistic media
A 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 tra
AI-generated / synthetic video. Not a recording of a real person, place or event.
Codecs
The shared pan-city base plate encoded with AV1 (libaom-av1). Royalty-free and now decoded by every current browser. Encoding is far slower than H.264, which is why this fixture uses a fast preset; the bitstream is stand
Hdr
Wide-gamut primaries with a conventional SDR transfer: wide colour without HDR. Frequently mishandled because tooling assumes BT.2020 always implies PQ or HLG. Every clip in this group carries the SAME picture and differ
Colour
The colour-patches plate with 50% of its saturation removed, leaving 50% of the original chroma. This is the faded-archive case rather than the black-and-white one: some colour information survives, so the task is restor
Colour
The gradient-sky plate with 50% of its saturation removed, leaving 50% of the original chroma. This is the faded-archive case rather than the black-and-white one: some colour information survives, so the task is restorat
Colour
The pan-city plate with 50% of its saturation removed, leaving 50% of the original chroma. This is the faded-archive case rather than the black-and-white one: some colour information survives, so the task is restoration
Compress
The detail-chart plate at CRF 28: mild artefacts. Encoded from the original frames rather than transcoded from the reference, so it carries exactly one generation of loss and the comparison is clean. On this plate the fi
Compress
The gradient-sky plate at CRF 28: mild artefacts. Encoded from the original frames rather than transcoded from the reference, so it carries exactly one generation of loss and the comparison is clean. On this plate the da
Compress
The text-motion plate at CRF 28: mild artefacts. Encoded from the original frames rather than transcoded from the reference, so it carries exactly one generation of loss and the comparison is clean. On this plate the dam
Containers
One H.264 elementary stream wrapped in 3GP. Every file in this group was produced from the SAME encode with a stream copy, so the compressed video bytes are identical and the container is genuinely the only difference. T
B Roll Action
Compact H.264 b-roll action clip 001 with a deterministic lateral marker for trim, crop, and shot-order tests. Stable P8 artifact p8-video-broll-001.
B Roll Action
Compact H.264 b-roll action clip 002 with a deterministic lateral marker for trim, crop, and shot-order tests. Stable P8 artifact p8-video-broll-002.
B Roll Action
Compact H.264 b-roll action clip 003 with a deterministic lateral marker for trim, crop, and shot-order tests. Stable P8 artifact p8-video-broll-003.
