# bilibili/flv.js

HTML5 FLV Player

Repository: https://github.com/bilibili/flv.js
Canonical: https://ross.abutalabs.com/products/flvjs
Language: JavaScript
License: Apache-2.0
License Family: permissive
Last push: 2024-07-07T07:28:53+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 3765, "days_push": 787, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 23194, forks 3338 (observed 2026-08-28T04:11:34.562782+00:00)

## What it is
A pure-JavaScript HTML5 FLV player that transmuxes FLV streams into fragmented MP4 segments and plays them via Media Source Extensions. It supports H.264 + AAC/MP3 playback, multipart segmented video, and low-latency HTTP/WebSocket FLV live streams.

## Use cases
- play flv videos in the browser without flash
- play low-latency http flv live streams in html5
- stream flv over websocket to a video element
- play multipart segmented flv videos
- embed flv playback in a web app with mse

## When to choose
- you need to play FLV (H.264 + AAC/MP3) content in modern browsers without Flash
- you need low-latency HTTP FLV or FLV-over-WebSocket live playback
- you want hardware-accelerated playback via Media Source Extensions with broad browser support

## When to avoid
- you need actively maintained FLV or MPEG-TS live stream playback - use mpegts.js instead
- you need MP3 audio support on IE11 or Edge
- your project requires a library under heavy active development

## Facets
- artifact type: library
- maturity: maintenance
- function: video-processing, streaming
- domain: media, web-development
- platform: browser
- tags: flv, mse, html5-video, transmuxing, live-streaming, video, javascript

## Member repositories
- bilibili/flv.js (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:34.562782+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T16:56:46.475901+00:00, confidence not recorded.
  - readme: https://github.com/bilibili/flv.js (fetched 2026-08-28T04:11:34.562782+00:00, sha a3f10bb3237f)
  - registry_npm: https://registry.npmjs.org/flv.js (fetched 2026-08-29T07:54:55.422749+00:00, sha 2f63149ee421)
- Data as of 2026-08-30T08:39:29.467469+00:00.