Media and visual

Colours, image and page sizes, video and audio formats and subtitles.

Topics

Colour is a colour as a web page uses it: written as CSS writes a hex colour, #1e6fd9, and held as its red, green, blue and alpha channels.

The media types describe images, video, audio and captions: an image's size, a frame rate, a timecode, a subtitle cue, a film's age rating.

Type	What it is
`Colour`	A colour, written `#1e6fd9`, or `#1e6fd980` when it isn't fully opaque.
`ImageDimensions`	An image's width and height in pixels: `1920x1080`.
`AspectRatio`	Width to height in whole numbers: `16:9`.
`Rect`	A rectangle by its top-left corner and its size, written like an SVG `viewBox`: `0 0 300 200`.
`Insets`	Space inside each edge, written in CSS's order: `8 16 8 16`.
`PaperSize`	A paper size: `A4`, `Letter` and so on.
`ExifOrientation`	How a stored photo must be turned to look upright, as a camera records it.
`AltText`	What an image shows, for someone who can't see it.
`FrameRate`	Frames a second, as an exact fraction: `25/1`, or `30000/1001` for 29.97.
`VideoResolution`	A video's frame size in pixels: `1920x1080`.
`VideoCodec`	A video format as browsers name it: `avc1.42001E`, `vp09.00.10.08`.
`AudioCodec`	An audio format as browsers name it: `mp4a.40.2`, `opus`.
`Timecode`	An address of one frame in a video: hours, minutes, seconds and frames.
`SubtitleCue`	A timed caption: when it starts and ends, and its text.
`ContentRating`	An age rating and the body that gave it: `BBFC 12A`.
`ContentRatingScheme`	A body that rates films or games for age: `BBFC`, `MPA`, `PEGI` or `ESRB`.

Markdown for agents: /docs/types-media-and-visual.md.Built from Jadpo main at 6cc3cb4.