Creator Overlay Alpha Still 009
Download-only RGBA overlay still 009 with two known alpha levels for compositor and premultiplication comparisons. Stable P8 artifact p8-video-overlay-png-009.
Specifications
- Variant
- 9
- Resolution
- 192x108
- Alpha
- true
- Delivery Mode
- download-only
- Provider
- browser-local
- Provenance
- Synthetic deterministic P8 fixture generated by generation/p8_content.py; seed namespace 2026082300
Testing contract
Reference control- Scenario
- Decode the PNG as RGBA and inspect transparent, semi-transparent, and opaque pixel regions.
- Expected result
- Variant 009 is 192x108 RGBA, retains a fully transparent background, and includes distinct nonzero alpha values in both overlay marks.
What is a .png file?
PNG (Portable Network Graphics) is a raster image format using lossless DEFLATE compression. It supports full 8- or 16-bit-per-channel truecolor, palette, and greyscale modes with an optional alpha channel, but no animation. It is the standard choice for screenshots, logos, and graphics with sharp edges or transparency.
How to use this file
Use an example PNG to test image decoders, alpha-compositing, thumbnail generators, and format converters, or to verify that a pipeline preserves transparency and color depth on round-trip.
How to use this file for testing
“Creator Overlay Alpha Still 009” is a deterministic Novus Examples fixture for Video editing, Image matting, Media pipeline testing. Short playable clips plus overlays, captions, timelines, colour targets, sync references, and controlled failures for testing browser and desktop editing workflows.
Documented properties for this file: PNG · 1,014 bytes. 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.
Playable creator clips use their measured duration and catalog thumbnail on a watch-first page. Timeline, caption, sync, colour, and failure sidecars remain download-only; compare their ordered decisions and expected outcome rather than assuming every creator format is browser-playable.
Relink the declared local assets, preserve rational or frame-based timing, and compare the resulting clip order, transitions, duration, and sync markers with the expected contract.
Code examples
<img src="p8-video-overlay-png-009.png" alt="Example image" width="640" loading="lazy">Related files
- pngCreator Overlay Alpha Still 001Download-only RGBA overlay still 001 with two known alpha levels for compositor and premultiplication comparisons. Stable P8 artifact p8-video-overlay-png-001.
- pngCreator Overlay Alpha Still 002Download-only RGBA overlay still 002 with two known alpha levels for compositor and premultiplication comparisons. Stable P8 artifact p8-video-overlay-png-002.
- pngCreator Overlay Alpha Still 003Download-only RGBA overlay still 003 with two known alpha levels for compositor and premultiplication comparisons. Stable P8 artifact p8-video-overlay-png-003.
- pngCreator Overlay Alpha Still 004Download-only RGBA overlay still 004 with two known alpha levels for compositor and premultiplication comparisons. Stable P8 artifact p8-video-overlay-png-004.
- pngCreator Overlay Alpha Still 005Download-only RGBA overlay still 005 with two known alpha levels for compositor and premultiplication comparisons. Stable P8 artifact p8-video-overlay-png-005.
- pngCreator Overlay Alpha Still 006Download-only RGBA overlay still 006 with two known alpha levels for compositor and premultiplication comparisons. Stable P8 artifact p8-video-overlay-png-006.
Generated by generation/p8_content.py. Free for any use, no attribution required — license.