@etaio/frames

Video and audio frame processing utilities for the etaio ecosystem.

Features

• WebCodecs Integration: Modern web APIs for video/audio processing
• MP4 Utilities: MP4 file manipulation, concatenation, and duration fixing
• Audio Processing: PCM extraction, resampling, volume adjustment, and mixing
• Video Clips: MP4Clip class for video frame extraction and thumbnails
• Stream Processing: Utilities for working with streams and files

Installation

npm install @etaio/frames
# or
pnpm add @etaio/frames

Usage

import { MP4Clip, decodeImg, audioResample } from '@etaio/frames';

// Create a video clip for thumbnail extraction
const clip = new MP4Clip(videoStream);
const thumbnails = await clip.thumbnailsList(150, {
  timestamps: [1000000, 2000000, 3000000] // microseconds
});

// Audio processing
const resampledAudio = audioResample(audioData, 44100, 48000);

API

Classes

• MP4Clip - Video clip processing and thumbnail extraction

Audio Utils

• extractPCM4AudioData - Extract PCM data from AudioData
• audioResample - Resample audio data
• mixinPCM - Mix multiple PCM streams

MP4 Utils

• fastConcatMP4 - Concatenate MP4 files
• fixFMP4Duration - Fix fragmented MP4 duration
• recodemux - Remux video streams

DOM Utils

• decodeImg - Decode image data
• file2stream - Convert file to stream

License

Licensed under the MIT License.