pproenca/node-webcodecs

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README del repositorio

Archivo de origen del README: README.md

# node-webcodecs WebCodecs API for Node.js — encode and decode video/audio with browser-compatible APIs, powered by FFmpeg. [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](LICENSE) [![Node.js](https://img.shields.io/badge/node-%3E%3D20-blue)](package.json) ## Why node-webcodecs? | Feature | node-webcodecs | Browser WebCodecs | | -------------------- | --------------------------- | ----------------- | | **Video Codecs** | H.264, H.265, VP8, VP9, AV1 | Varies by browser | | **Audio Codecs** | AAC, Opus, MP3, FLAC | Varies by browser | | **Container Muxing** | MP4 | Not in spec | | **Demuxing** | Any FFmpeg format | Not in spec | | **Server-side** | Yes | Browser only | ## Installation ```bash npm install @pproenca/node-webcodecs ``` Prebuilt binaries with FFmpeg statically linked are included for: - macOS ARM64 (Apple Silicon) - macOS x64 (Intel) - Linux x64 (musl, fully static) <details> <summary><strong>Building from Source</strong></summary> For other platforms or to force a source build: ```bash npm install @pproenca/node-webcodecs --build-from-source ``` This requires FFmpeg 5.0+ development libraries: **macOS:** ```bash brew install ffmpeg pkg-config ``` **Ubuntu/Debian:** ```bash sudo apt-get install libavcodec-dev libavformat-dev libavutil-dev \ libswscale-dev libswresample-dev libavfilter-dev pkg-config ``` **Fedora/RHEL:** ```bash sudo dnf install ffmpeg-devel pkg-config ``` </details> ## Quick Start ### Encode ```javascript import { VideoEncoder, VideoFrame } from "@pproenca/node-webcodecs"; const encoder = new VideoEncoder({ output: (chunk) => chunks.push(chunk), error: console.error, }); encoder.configure({ codec: "avc1.42001e", width: 1920, height: 1080, bitrate: 5_000_000, }); const frame = new VideoFrame(rgbaBuffer, { format: "RGBA", codedWidth: 1920, codedHeight: 1080, timestamp: 0, }); encoder.encode(frame); frame.close(); await encoder.flush(); ``` ### Decode ```javascript import { VideoDecoder, EncodedVideoChunk } from "@pproenca/node-webcodecs"; const decoder = new VideoDecoder({ output: (frame) => { // Process frame... frame.close(); }, error: console.error, }); decoder.configure({ codec: "avc1.42001e", codedWidth: 1920, codedHeight: 1080, }); decoder.decode(new EncodedVideoChunk({ type: "key", timestamp: 0, data })); await decoder.flush(); ``` ### Mux to MP4 ```javascript import { Muxer } from "@pproenca/node-webcodecs"; const muxer = new Muxer({ filename: "output.mp4" }); muxer.addVideoTrack({ codec: "avc1.42001e", width: 1920, height: 1080, description: codecDescription, }); muxer.writeVideoChunk(chunk); muxer.finalize(); ``` ### Demux ```javascript import { Demuxer } from "@pproenca/node-webcodecs"; const demuxer = new Demuxer({ onTrack: (track) => console.log(track.codec), onChunk: (chunk, trackIndex) => decoder.decode(chunk), onError: console.error, }); demuxer.open("input.mp4"); demuxer.demux(); demuxer.close(); ``` See [examples/](examples/) for complete working code. ## API This library implements the [W3C WebCodecs specification](https://www.w3.org/TR/webcodecs/). | Class | Description | | ----------------------------------------- | ------------------------------- | | `VideoEncoder` / `VideoDecoder` | Compress / decompress video | | `AudioEncoder` / `AudioDecoder` | Compress / decompress audio | | `VideoFrame` / `AudioData` | Raw media containers | | `EncodedVideoChunk` / `EncodedAudioChunk` | Compressed media packets | | `ImageDecoder` | Decode JPEG, PNG, WebP, GIF | | | | | `Muxer` / `Demuxer` | Container I/O (beyond W3C spec) | **Video codecs:** H.264, H.265, VP8, VP9, AV1 **Audio codecs:** AAC, Opus, MP3 (decode), FLAC (decode) See [docs/codecs.md](docs/codecs.md) for codec strings and pixel formats. See [docs/best-practices.md](docs/best-practices.md) for resource management, error handling, and queue management guidance. ## Contributing See [CONTRIBUTING.md](.github/CONTRIBUTING.md). ## License MIT

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