hang

A media library built on top of moq-lite for streaming audio and video. hang provides media-specific functionality, split into a few components:

• Broadcast: A discoverable collection of tracks, documented using a catalog.
• Catalog: Metadata describing the available tracks, codec information, etc. This is a live track itself and is updated as tracks are added/removed/changed.
• Timeline: A per-track index mapping each of a media track's groups to its start timestamp, so consumers can seek (or build playlists) without downloading media. Advertised in the media track's catalog entry; itself a live track.
• Track: Audio/video streams, as well as other types of data.
• Group: A group of pictures (video) or collection of samples (audio). Each group is independently decodable.
• Frame: A timestamp and a codec payload pair.

Supported Codecs

We most of the implement the WebCodecs specification.

• Video: H.264, H.265, VP8, VP9, AV1
• Audio: AAC, Opus

CMAF Import

For importing fMP4/CMAF files, see the moq-mux crate. For HLS, see the moq-hls crate.

Examples

• Publishing a video track